CSM_NX-OD_OC_DS_E_7_1
1
NX-series Digital Output Units
NX-OD/OC
A Wide Range of Digital Output
Units from General Purpose use to
High-Speed Synchronous Control
• Transistor and relay Output Units for the NX-series
modular I/O system.
• Connect to other NX-series I/O Units and EtherCAT
Coupler units using the high-speed NX-bus.
• Synchronous Units update their output status according
to the controller's instructions every EtherCAT cycle.
Features
•High-speed I/O refreshing is possible by connecting with the NX-series EtherCAT Coupler.
•Output refreshing can be synchronized with the control cycle of the Controller. (Synchronous refreshing)
•ON/OFF response time of the high-speed model is 300 ns max, which enables high-speed, high-precision control.
•The screwless terminal block is detachable for easy commissioning and maintenance.
•Screwless clamp terminal block and Connector types (Units with MIL/Fujitsu Connectors) are significantly reduces wiring work.
•Up to 16 digital outputs in a space-saving 12 mm width. (Connector Types 30 mm width)
•The lineup includies 2-point, 4-point, 8-point, 16-point, and 32-point types with 3-wire, 2-wire and 1-wire connection methods.
•With output refreshing with specified time stamp, the Output Unit refreshes outputs at the time specified by the program. This enables high-
precision output control independent of the control cycle of the Controller.
•Connection to the CJ-series is possible by connecting with the EtherNet/IPTM Coupler.
Sysmac is a trademark or registered trademark of OMRON Corporation in Japan and other countries for OMRON factory automation products.
EtherCAT is a registered trademark of Beckhoff Automation GmbH for their patented technology. EtherNet/IPTM is the trademarks of ODVA.
Other company names and product names in this document are the trademarks or registered trademarks of their respective companies.
NX-OD/OC
2
System Configuration
System Configuration in the Case of a CPU Unit
The following figure shows a system configuration when a group of NX Units is connected to an NX-series CPU Unit.
System Configuration of Slave Terminals
The following figure shows an example of the system configuration when an EtherCAT Coupler Unit is used as a Communications Coupler Unit.
*1. The connection method for the Sysmac Studio depends on the model of the CPU Unit or Industrial PC.
*2. An EtherCAT Slave Terminal cannot be connected to any of the OMRON CJ1W-NC@81/@82 Position Control Units even though they can
operate as EtherCAT masters.
Note: For whether NX Units can be connected to the CPU Unit or Communications Coupler Unit to be used, refer to the user's manual for the CPU
Unit or Communications Coupler Unit to be used.
Sysmac Studio
Support Software
End Cover
NX Units
NX Units
Built-in EtherCAT port
NX-series CPU Unit
EtherCAT Slave Terminal
Connection to built-in
EtherNet/IP port
● CPU Rack
NX1P2-@@@@@@@
EtherCAT
EtherCAT Coupler Unit
EtherCAT master *2
NJ/NX-series CPU Unit, NY-series Industrial PC, or
master from another manufacturer
Communications cable
Ethernet cables NX Series
EtherCAT Coupler Unit
NX-ECC@@@
●EtherCAT Slave Terminal
Sysmac Studio
Support Software
Sysmac Studio
Support Software
End Cover
NX Units
Built-in EtherCAT port
Connection to peripheral USB port
or built-in EtherNet/IPTM port on
CPU Unit or Industrial PC *1
Connection to peripheral USB
port on EtherCAT Coupler Unit
Peripheral USB port.
ESI files
.xml
ESI files
.xml
3
NX-OD/OC
Ordering Information
International Standards
•The standards are abbreviated as follows: U: UL, U1: UL (Class I Division 2 Products for Hazardous Locations), C: CSA, UC: cULus, UC1:
cULus (Class I Division 2 Products for Hazardous Locations), CU: cUL, N: NK, L: Lloyd, CE: EU Directives, RCM: Regulatory Compliance Mark,
and KC: KC Registration.
•Contact your OMRON representative for further details and applicable conditions for these standards.
Digital Output Units
●Transistor Output Unit (Screwless Clamping Terminal Block, 12 mm Width)
* To use output refreshing with specified time stamp, the NJ-series CPU Unit with unit version 1.06 or later, EtherCAT Coupler Unit with unit version
1.1 or later, and Sysmac Studio version 1.07 or higher are required.
●Transistor Output Units (M3 Screw Terminal Block, 30 mm Width)
●Transistor Output Units (MIL Connector, 30 mm Width)
Unit type Product
name
Specification
Model Standards
Number
of points
Internal
I/O
common
Maximum
value of load
current
Rated
voltage I/O refreshing method
ON/OFF
response
time
NX-series
Digital
Output
Unit
Transistor
Output
Unit
2 points
NPN 0.5 A/point,
1 A/Unit 24 VDC Output refreshing with specified time
stamp only*
300 ns max./
300 ns max.
NX-OD2154
UC1, N, L,
CE, RCM,
KC
PNP NX-OD2258
4 points
NPN
0.5 A/point,
2 A/Unit
12 to 24 VDC
Switching Synchronous I/O refreshing
and Free-Run refreshing
0.1 ms max./
0.8 ms max. NX-OD3121
24 VDC
300 ns max./
300 ns max. NX-OD3153
PNP
0.5 ms max./
1.0 ms max. NX-OD3256
300 ns max./
300 ns max. NX-OD3257
2 A/point,
8 A/Unit
0.5 ms max./
1.0 ms max. NX-OD3268 UC1, CE,
RCM, KC
8 points
NPN
0.5 A/point,
4 A/Unit
12 to 24 VDC 0.1 ms max./
0.8 ms max. NX-OD4121
UC1, N, L,
CE, RCM,
KC
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD4256
16 points
NPN 12 to 24 VDC 0.1 ms max./
0.8 ms max. NX-OD5121
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD5256
Unit type Product
name
Specification
Model Standards
Number
of points
Internal
I/O
common
Maximum
value of load
current
Rated
voltage I/O refreshing method
ON/OFF
response
time
NX-series
Digital
Output
Unit
Transistor
Output
Unit
16 points
NPN
0.5 A/point,
5 A/Unit
12 to 24 VDC
Switching Synchronous I/O refreshing
and Free-Run refreshing
0.1 ms max./
0.8 ms max.
NX-OD5121-1
UC1, CE,
RCM, KC
PNP 24 VDC 0.5 ms max./
1.0 ms max.
NX-OD5256-1
Unit type Product
name
Specification
Model Standards
Number
of points
Internal
I/O
common
Maximum
value of load
current
Rated
voltage I/O refreshing method
ON/OFF
response
time
NX-series
Digital
Output
Unit
Transistor
Output
Unit 16 points
NPN 0.5 A/point,
2 A/Unit
12 to 24 VDC
Switching Synchronous I/O refreshing
and Free-Run refreshing
0.1 ms max./
0.8 ms max.
NX-OD5121-5
UC1, CE,
RCM, KC
PNP 24 VDC 0.5 ms max./
1.0 ms max.
NX-OD5256-5
32 points
NPN
0.5 A/point,
2 A/common,
4 A/Unit
12 to 24 VDC 0.1 ms max./
0.8 ms max.
NX-OD6121-5
PNP 24 VDC 0.5 ms max./
1.0 ms max.
NX-OD6256-5
NX-OD/OC
4
●Transistor Output Unit (Fujitsu Connector, 30 mm Width)
●Relay Output Units (Screwless Clamping Terminal Block, 12 mm Width)
●Relay Output Unit (Screwless Clamping Terminal Block, 24 mm Width)
Optional Products
Accessories
Not included.
Unit type Product
name
Specification
Model Standards
Number
of points
Internal
I/O
common
Maximum
value of load
current
Rated
voltage I/O refreshing method
ON/OFF
response
time
NX-series
Digital
Output
Unit
Transistor
Output
Unit
32 points NPN
0.5 A/point,
2 A/common,
4 A/Unit
12 to 24 VDC Switching Synchronous I/O refreshing
and Free-Run refreshing
0.1 ms max./
0.8 ms max.
NX-OD6121-6
UC1, CE,
RCM, KC
Unit type Product
name
Specification
Model Standards
Number
of points
Relay
type
Maximum switching
capacity I/O refreshing method
ON/OFF
response
time
NX-series
Digital
Output
Unit
Relay
Output
Unit
2 points
N.O.
250 VAC/2A (cosφ=1)
250 VAC/2A (cosφ=0.4)
24 VDC/2A
4 A/Unit
Free-Run refreshing 15ms max./
15ms max.
NX-OC2633
UC1, N, L,
CE, RCM,
KC
N.O.+
N.C. NX-OC2733 UC1, N, CE,
RCM, KC
Unit type Product
name
Specification
Model Standards
Number
of points
Relay
type
Maximum switching
capacity I/O refreshing method
ON/OFF
response
time
NX-series
Digital
Output
Unit
Relay
Output
Unit
8 points N.O.
250 VAC/2A (cosφ=1)
250 VAC/2A (cosφ=0.4)
24 VDC/2A
8 A/Unit
Free-Run refreshing 15ms max./
15ms max. NX-OC4633 UC1, CE,
RCM, KC
Product name Specification Model Standards
Unit/Terminal Block Coding Pins For 10 Units
(Terminal Block: 30 pins, Unit: 30 pins) NX-AUX02 ---
Product name
Specification
Model Standards
No. of
terminals
Terminal
number
indications
Ground
terminal mark
Terminal
current
capacity
Terminal Block
8
A/B None 10 A
NX-TBA082
---12 NX-TBA122
16 NX-TBA162
NX-OD/OC
5
Connection Patterns for Connector-Terminal Block Conversion Units
Connections to Connector-Terminal Block Conversion Units
Pattern Configuration Number of connectors Branching
A
1
None
B2 branches
Unit I/O capacity Number of
connectors Polarity Connection
pattern
Number of
branches
Connecting
Cable
Connector-Terminal Block
Conversion Unit
Common
terminal
NX-OD5121-5 16 outputs 1 MIL
connector NPN
A None XW2Z-@@@X XW2B-20G4 None
A None XW2Z-@@@X XW2B-20G5 None
A None XW2Z-@@@X XW2D-20G6 None
A None XW2Z-@@@X XW2R-J20G-T None
NX-OD5256-5 16 outputs 1 MIL
connector PNP
A None XW2Z-@@@X XW2B-20G4 None
A None XW2Z-@@@X XW2B-20G5 None
A None XW2Z-@@@X XW2D-20G6 None
A None XW2Z-@@@X XW2R-J20G-T None
NX-OD6121-5 32 outputs 1 MIL
connector NPN
A None XW2Z-@@@K XW2B-40G4 None
A None XW2Z-@@@K XW2B-40G5 None
A None XW2Z-@@@K XW2D-40G6 None
A None XW2Z-@@@K XW2R-J40G-T None
B 2 XW2Z-@@@N XW2B-20G4 (2 Units) None
B 2 XW2Z-@@@N XW2B-20G5 (2 Units) None
B 2 XW2Z-@@@N XW2C-20G6-IO16 (2 Units) Yes
B 2 XW2Z-@@@N XW2D-20G6 (2 Units) None
B 2 XW2Z-@@@N XW2F-20G7-OUT16 (2 Units) Yes
B 2 XW2Z-@@@N XW2R-J20G-T (2 Units) None
NX-OD6121-6 32 outputs 1 Fujitsu
connector NPN
A None XW2Z-@@@B XW2B-40G4 None
A None XW2Z-@@@B XW2B-40G5 None
A None XW2Z-@@@B XW2D-40G6 None
A None XW2Z-@@@B XW2R-J40G-T None
A None XW2Z-@@@BU XW2D-40C6 None
B 2 XW2Z-@@@L XW2B-20G4 (2 Units) None
B 2 XW2Z-@@@L XW2B-20G5 (2 Units) None
B 2 XW2Z-@@@L XW2C-20G6-IO16 (2 Units) Yes
B 2 XW2Z-@@@L XW2D-20G6 (2 Units) None
B 2 XW2Z-@@@L XW2F-20G7-OUT16 (2 Units) Yes
B2 XW2Z-@@@L XW2R-J20G-T (2 Units) None
NX-OD6256-5 32 outputs 1 MIL
connector PNP
A None XW2Z-@@@K XW2B-40G4 None
A None XW2Z-@@@K XW2B-40G5 None
A None XW2Z-@@@K XW2D-40G6 None
A None XW2Z-@@@K XW2R-J40G-T None
B 2 XW2Z-@@@N XW2B-20G4 (2 Units) None
B 2 XW2Z-@@@N XW2B-20G5 (2 Units) None
B 2 XW2Z-@@@N XW2C-20G6-IO16 (2 Units) Yes
B 2 XW2Z-@@@N XW2D-20G6 (2 Units) None
B 2 XW2Z-@@@N XW2F-20G7-OUT16 (2 Units) Yes
B 2 XW2Z-@@@N XW2R-J20G-T (2 Units) None
Connector-Terminal Block
Conversion Unit
20 or 40 terminals
Connecting Cable
20 terminals 20 terminals
Connector-Terminal Block
Conversion Unit
Connecting Cable with two branches
NX-OD/OC
6
General Specification
*1. For the Relay Output Unit, refer to the Digital Input Unit Specifications.
*2. Refer to the OMRON website (http://www.ia.omron.com/) or consult your OMRON representative for the most recent applicable standards for
each model.
Item Specification
Enclosure Mounted in a panel
Grounding method Ground to 100 Ω or less
Operating
environment
Ambient operating temperature 0 to 55°C
Ambient operating humidity 10% to 95% (with no condensation or icing)
Atmosphere Must be free from corrosive gases.
Ambient storage temperature −25 to 70°C (with no condensation or icing)
Altitude 2,000 m max.
Pollution degree 2 or less: Conforms to JIS B3502 and IEC 61131-2.
Noise immunity 2 kV on power supply line (Conforms to IEC61000-4-4.)
Overvoltage category Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level Zone B
Vibration resistance *1
Conforms to IEC 60068-2-6.
5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of 9.8 m/s2, 100 min each
in X, Y, and Z directions
(10 sweeps of 10 min each = 100 min total)
Shock resistance *1 Conforms to IEC 60068-2-27. 147 m/s2, 3 times each in X, Y, and Z directions
Applicable standards *2 cULus: Listed (UL508) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01,
EU: EN 61131-2 or EN 61010-2-201, C-Tick or RCM, KC: KC Registration, NK, LR
7
NX-OD/OC
Digital Output Unit Specifications
● Transistor Output Unit (Screwless Clamping Terminal Block 12 mm, Width)
NX-OD2154
Unit name Transistor Output Unit Model NX-OD2154
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Output refreshing with specified time stamp
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 1 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.85 W max.
• Connected to a Communications
Coupler Unit
0.45 W max.
I/O current consumption 30 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function Not supported.
OUT0 to OUT1
This unit uses a push-pull output circuit.
IOV0 to 1
IOG0 to 1
Terminal block
Internal circuits
Isolation circuit
Drive circuit
NX bus
connector
(left)
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Two-wire type
Three-wire type
24 VDC
Transistor Output
Unit
NX-OD2154
Additional I/O
Power Supply Unit
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
A1 B1
A8 B8
A1 B1
A8 B8
OUT1
IOV
IOG
NC
OUT0
IOV
IOG
NC
NX-OD/OC
8
NX-OD2258
Unit name Transistor Output Unit Model NX-OD2258
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Output refreshing with specified time stamp
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 1 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.85 W max.
• Connected to a Communications
Coupler Unit
0.50 W max.
I/O current consumption 40 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function With load short-circuit protection.
OUT0 to OUT1
This unit uses a push-pull output circuit.
IOV0 to 1
IOG0 to 1
Terminal block
Internal circuits
Isolation circuit
Drive circuit
NX bus
connector
(left)
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Two-wire type
Three-wire type
24 VDC
Transistor Output
Unit
NX-OD2258
Additional I/O
Power Supply Unit
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
A1 B1
A8 B8
A1 B1
A8 B8
OUT1
IOV
IOG
NC
OUT0
IOV
IOG
NC
NX-OD/OC
9
NX-OD3121
Unit name Transistor Output Unit Model NX-OD3121
Number of points 4 points External connection
terminals
Screwless clamping terminal block (12
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.90 W max.
• Connected to a Communications
Coupler Unit
0.55 W max.
I/O current consumption 10 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function Not supported.
OUT0 to OUT3
IOV0 to 3
IOG0 to 3
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
Internal circuits
I/O power supply +
I/O power supply −
NX bus
connector
(right)
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
OUT0
IOG0
IOV2
IOV0
A1 B1
A8 B8
OUT2
IOG2
OUT1
IOG1
IOV3
IOV1
OUT3
IOG3
Two-wire type
Three-wire type
12 to 24 VDC
A1 B1
A8 B8
Transistor Output
Unit
NX-OD3121
Additional I/O
Power Supply Unit
NX-OD/OC
10
NX-OD3153
Unit name Transistor Output Unit Model NX-OD3153
Number of points 4 points External connection
terminals
Screwless clamping terminal block (12
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.90 W max.
• Connected to a Communications
Coupler Unit
0.50 W max.
I/O current consumption 30 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function Not supported.
OUT0 to OUT3
This unit uses a push-pull output circuit.
IOV0 to 3
IOG0 to 3
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
Internal circuits
Isolation circuit
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Drive circuit
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
OUT0
IOG0
IOV2
IOV0
A1 B1
A8 B8
OUT2
IOG2
OUT1
IOG1
IOV3
IOV1
OUT3
IOG3
Two-wire type
Three-wire type
24 VDC
A1 B1
A8 B8
Transistor Output
Unit
NX-OD3153
Additional I/O
Power Supply Unit
NX-OD/OC
11
NX-OD3256
Unit name Transistor Output Unit Model NX-OD3256
Number of points 4 points External connection
terminals
Screwless clamping terminal block (12
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.90 W max.
• Connected to a Communications
Coupler Unit
0.55 W max.
I/O current consumption 20 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function With load short-circuit protection.
OUT0 to OUT3
IOV0 to 3
IOG0 to 3
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
Internal circuits
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Short-circuit protection
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
OUT0
IOG0
IOV2
IOV0
A1 B1
A8 B8
OUT2
IOG2
OUT1
IOG1
IOV3
IOV1
OUT3
IOG3
Two-wire type
Three-wire type
24 VDC
A1 B1
A8 B8
Transistor Output
Unit
NX-OD3256
Additional I/O
Power Supply Unit
NX-OD/OC
12
NX-OD3257
Unit name Transistor Output Unit Model NX-OD3257
Number of points 4 points External connection
terminals
Screwless clamping terminal block (12
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.85 W max.
• Connected to a Communications
Coupler Unit
0.50 W max.
I/O current consumption 40 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function With load short-circuit protection.
Short-circuit
protection
OUT0 to OUT3
This unit uses a push-pull output circuit.
IOV0 to 3
IOG0 to 3
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
Internal circuits
Isolation circuit
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Drive circuit
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
OUT0
IOG0
IOV2
IOV0
A1 B1
A8 B8
OUT2
IOG2
OUT1
IOG1
IOV3
IOV1
OUT3
IOG3
Two-wire type
Three-wire type
24 VDC
A1 B1
A8 B8
Transistor Output
Unit
NX-OD3257
Additional I/O
Power Supply Unit
13
NX-OD/OC
NX-OD3268
Unit name Transistor Output Unit Model NX-OD3268
Number of points 4 points External connection
terminals
Screwless clamping terminal block (16
terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 2 A/point, 8 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from external source Current capacity of I/O
power supply terminal
IOV: 2 A/terminal max.,
IOG: 2 A/terminal max.,
COM (+V): 4 A/terminal max.,
0V: 4 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.85 W max.
• Connected to a Communications
Coupler Unit
0.50 W max.
Current consumption
from I/O power supply 20 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit detection Not supported. Protective function With load short-circuit protection.
OUT 0 to OUT 3
IOG 0 to IOG 3
IOV 0 to IOV 3
COM (+V)
0V
I/O power
supply +
NX bus
connector
(left)
I/O power
supply −
NX bus
connector
(right)
I/O power
supply +
I/O power
supply −
Terminal block
Internal circuits
Short-circuit
protection
OUT0
IOG0
IOV2
IOV0
A1 B1
A8 B8
OUT2
IOG2
OUT1
IOG1
IOV3
IOV1
OUT3
IOG3
COM (+V) COM (+V)
0V 0V
Transistor Output Unit
NX-OD3268
Two-wire type
Three-wire type
24 V
DC
• 0V has 2 terminals, so be sure to wire both terminals.
• COM (+V) has 2 terminals, so be sure to wire both terminals.
NX-OD/OC
14
NX-OD4121
Unit name Transistor Output Unit Model NX-OD4121
Number of points 8 points External connection
terminals
Screwless clamping terminal block (16
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal IOV: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
0.90 W max.
• Connected to a Communications
Coupler Unit
0.55 W max.
I/O current consumption 10 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function Not supported.
OUT0 to OUT7
IOV0 to 7
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
Internal circuits
I/O power supply +
I/O power supply −
NX bus
connector
(right)
A1 B1
A8 B8
Two-wire type
Three-wire type
12 to 24 VDC
A1 B1
A8 B8
A1 B1
A8 B8
Transistor Output
Unit
NX-OD4121
Additional I/O
Power Supply Unit
I/O Power Supply
Connection Unit
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
OUT0
OUT2
OUT4
IOV0
IOV2
IOV4
OUT1
OUT3
OUT5
IOV1
IOV3
IOV6
OUT6
IOV7
OUT7
IOV5
15
NX-OD/OC
NX-OD4256
Unit name Transistor Output Unit Model NX-OD4256
Number of points 8 points External connection
terminals
Screwless clamping terminal block (16
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal IOG: 0.5 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.00 W max.
• Connected to a Communications
Coupler Unit
0.65 W max.
I/O current consumption 30 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function With load short-circuit protection.
OUT0 to OUT7
IOG0 to 7
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Internal circuits
Short-circuit protection
A1 B1
A8 B8
Two-wire type
Three-wire type
24 VDC
A1 B1
A8 B8
A1 B1
A8 B8
Transistor Output
Unit
NX-OD4256
Additional I/O
Power Supply Unit
I/O Power Supply
Connection Unit
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
OUT0
OUT2
OUT4
IOG0
IOG2
IOG4
OUT1
OUT3
OUT5
IOG1
IOG3
IOG6
OUT6
IOG7
OUT7
IOG5
NX-OD/OC
16
NX-OD5121
Unit name Transistor Output Unit Model NX-OD5121
Number of points 16 points External connection
terminals
Screwless clamping terminal block (16
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.00 W max.
• Connected to a Communications
Coupler Unit
0.65 W max.
I/O current consumption 20 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function Not supported.
OUT0 to OUT15
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Internal circuits
A1 B1
A8 B8
Two-wire type
Three-wire type
12 to 24 VDC
A1 B1
A8 B8
A1 B1
A8 B8
A1 B1
A8 B8
Transistor Output
Unit
NX-OD5121
Additional I/O
Power Supply Unit
I/O Power Supply
Connection Unit
I/O Power Supply
Connection Unit
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
OUT0
OUT4
OUT8
OUT2
OUT6
OUT10
OUT1
OUT5
OUT9
OUT3
OUT7
OUT14
OUT12
OUT15
OUT13
OUT11
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
17
NX-OD/OC
NX-OD5256
Unit name Transistor Output Unit Model NX-OD5256
Number of points 16 points External connection
terminals
Screwless clamping terminal block (16
terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 15 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the NX bus Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.10 W max.
• Connected to a Communications
Coupler Unit
0.70 W max.
I/O current consumption 40 mA max.
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function With load short-circuit protection.
OUT0 to OUT15
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Internal circuits
Short-circuit protection
A1 B1
A8 B8
Two-wire type
Three-wire type
24 VDC
A1 B1
A8 B8
A1 B1
A8 B8
A1 B1
A8 B8
Transistor Output
Unit
NX-OD5256
Additional I/O
Power Supply Unit
I/O Power Supply
Connection Unit
I/O Power Supply
Connection Unit
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
OUT0
OUT4
OUT8
OUT2
OUT6
OUT10
OUT1
OUT5
OUT9
OUT3
OUT7
OUT14
OUT12
OUT15
OUT13
OUT11
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
NX-OD/OC
18
● Transistor Output Units (M3 Screw Terminal Block, 30 mm Width)
NX-OD5121-1
Unit name Transistor Output Unit Model NX-OD5121-1
Number of points 16 points External connection
terminals M3 screw terminal block (18 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 5 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
0.90 W max.
• Connected to a Communications
Coupler Unit
0.60 W max.
Current consumption
from
I/O power supply
30 mA max.
Weight 125 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit detection Not supported. Protective function Not supported.
OUT0 to OUT15
COM
+V
I/O power
supply +
NX bus
connector
(left)
I/O power
supply −
NX bus
connector
(right)
I/O power
supply +
I/O power
supply −
Terminal block
Internal circuits
A0
AB
A2
A4
A1
A3
A5
A7
A8
A6
B0
B2
B4
B1
B3
B5
B7
B8
B6
OUT2
OUT6
OUT0
OUT4
OUT8
OUT12
OUT14
COM
OUT10
Terminal
Signal nameSignal name
12 to 24 VDC
OUT3
OUT7
OUT1
OUT5
OUT9
OUT13
OUT15
+V
OUT11
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
19
NX-OD/OC
NX-OD5256-1
Unit name Transistor Output Unit Model NX-OD5256-1
Number of points 16 points External connection
terminals M3 screw terminal block (18 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 20.4 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 5 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
0.95 W max.
• Connected to a Communications
Coupler Unit
0.65 W max.
Current consumption
from
I/O power supply
30 mA max.
Weight 125 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit detection Not supported. Protective function With load short-circuit protection.
OUT0 to OUT15
0V
COM (+V)
I/O power
supply +
NX bus
connector
(left)
I/O power
supply −
NX bus
connector
(right)
I/O power
supply +
I/O power
supply −
Terminal
block
Internal circuits
Short-circuit
protection
A0
AB
A2
A4
A1
A3
A5
A7
A8
A6
B0
B2
B4
B1
B3
B5
B7
B8
B6
OUT2
OUT6
OUT0
OUT4
OUT8
OUT12
OUT14
0V
OUT10
Terminal
Signal nameSignal name
24 VDC
OUT3
OUT7
OUT1
OUT5
OUT9
OUT13
OUT15
COM (+V)
OUT11
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
NX-OD/OC
20
● Transistor Output Units (MIL Connector, 30 mm Width)
NX-OD5121-5
Unit name Transistor Output Unit Model NX-OD5121-5
Number of points 16 points External connection
terminals MIL connector (20 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits
(at 100 VDC) Dielectric strength 510 VAC between isolated circuits for 1 minute at
a leakage current of 5 mA max.
I/O power supply method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power consumption
• Connected to a CPU Unit
0.95 W max.
• Connected to a Communications Coupler Unit
0.60 W max.
Current consumption from
I/O power supply 30 mA max.
Weight 80 g max.
Circuit layout
Installation orientation and
restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/Short-circuit
detection Not supported. Protective function Not supported.
OUT0 to OUT15
COM
+V
+V
COM
I/O power supply +
NX bus
connector
(left) I/O power supply −
NX bus
connector
(right)
I/O power supply +
I/O power supply −
Connector
Internal circuits
1
5
9
3
7
11
15
17
19
13
+V
OUT15
OUT13
COM
OUT14
OUT12
OUT10
OUT09
OUT08
OUT11
2
6
10
4
8
12
16
18
20
14
12 to
24 VDC +V
OUT07
OUT05
COM
OUT06
OUT04
OUT02
OUT01
OUT00
OUT03
L L
L L
L L
L L
L L
L L
L L
L L
Connector
pin
Signal
name
Signal
name
• Be sure to wire both pins 3 and 4 (COM).
• Be sure to wire both pins 1 and 2 (+V).
21
NX-OD/OC
NX-OD5256-5
Unit name Transistor Output Unit Model NX-OD5256-5
Number of points 16 points External connection
terminals MIL connector (20 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 20.4 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at 100
VDC) Dielectric strength 510 VAC between isolated circuits for 1 minute at
a leakage current of 5 mA max.
I/O power supply method Supplied from external source. Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power consumption
• Connected to a CPU Unit
1.00 W max.
• Connected to a Communications Coupler Unit
0.70 W max.
Current consumption from
I/O power supply 40 mA max.
Weight 85 g max.
Circuit layout
Installation orientation and
restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/Short-circuit
detection Not supported. Protective function With load short-circuit protection.
OUT0 to OUT15
0V
COM (+V)
COM (+V)
0V
I/O power supply +
NX bus
connector
(left) I/O power supply −
NX bus
connector
(right)
I/O power supply +
I/O power supply −
Connector
Internal circuits
Short-circuit
protection
1
5
9
3
7
11
15
17
19
13
COM (+V)
OUT15
OUT13
0V
OUT14
OUT12
OUT10
OUT09
OUT08
OUT11
2
6
10
4
8
12
16
18
20
14
24 VDC
COM (+V)
OUT07
OUT05
0V
OUT06
OUT04
OUT02
OUT01
OUT00
OUT03
L L
L L
L L
L L
L L
L L
L L
L L
Connector
pin
Signal
name
Signal
name
• Be sure to wire both pins 1 and 2 (COM (+V)).
• Be sure to wire both pins 3 and 4 (0V).
NX-OD/OC
22
NX-OD6121-5
Unit name Transistor Output Unit Model NX-OD6121-5
Number of points 32 points External connection
terminals MIL connector (40 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits
(at 100 VDC) Dielectric strength 510 VAC between isolated circuits for 1 minute at
a leakage current of 5 mA max.
I/O power supply method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power consumption
• Connected to a CPU Unit
1.00 W max.
• Connected to a Communications Coupler Unit
0.80 W max.
Current consumption from
I/O power supply 50 mA max.
Weight 90 g max.
Circuit layout
Installation orientation and
restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
OUT0
to OUT15
COM0
+V0
OUT16
to OUT31
COM1
+V1
+V0
COM0
+V1
COM1
I/O power supply +
NX bus
connector
(left) I/O power supply −
NX bus
connector
(right)
I/O power supply +
I/O power supply −
Internal circuits
Connector
23
NX-OD/OC
Terminal connection
diagram
Disconnection/Short-circuit
detection Not supported. Protective function Not supported.
1
5
9
3
7
11
15
17
19
13
+V1
OUT31
OUT29
COM1
OUT30
OUT28
OUT26
OUT25
OUT24
OUT27
2
6
10
4
8
12
16
18
20
14
21
25
29
23
27
31
35
37
39
33
22
26
30
24
28
32
36
38
40
34
+V1
OUT23
OUT21
COM1
OUT22
OUT20
OUT18
OUT17
OUT16
OUT19
+V0
OUT15
OUT13
COM0
OUT14
OUT12
OUT10
OUT09
OUT08
OUT11
+V0
OUT07
OUT05
COM0
OUT06
OUT04
OUT02
OUT01
OUT00
OUT03
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
Connector
pin
Signal
name
Signal
name
• Be sure to wire both pins 21 and 22 (+V0).
• Be sure to wire both pins 23 and 24 (COM0).
• Be sure to wire both pins 1 and 2 (+V1).
• Be sure to wire both pins 3 and 4 (COM1).
12 to
24 VDC
12 to
24 VDC
NX-OD/OC
24
NX-OD6256-5
Unit name Transistor Output Unit Model NX-OD6256-5
Number of points 32 points External connection
terminals MIL connector (40 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common PNP
Rated voltage 24 VDC
Operating load voltage
range 20.4 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.5 ms max./1.0 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at 100
VDC) Dielectric strength 510 VAC between isolated circuits for 1 minute at
a leakage current of 5 mA max.
I/O power supply method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power consumption
• Connected to a CPU Unit
1.30 W max.
• Connected to a Communications Coupler Unit
1.00 W max.
Current consumption from
I/O power supply 80 mA max.
Weight 95 g max.
Circuit layout
Installation orientation and
restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
25
NX-OD/OC
Terminal connection
diagram
Disconnection/Short-circuit
detection Not supported. Protective function With load short-circuit protection.
1
5
9
3
7
11
15
17
19
13
COM1 (+V)
OUT31
OUT29
0V1
OUT30
OUT28
OUT26
OUT25
OUT24
OUT27
2
6
10
4
8
12
16
18
20
14
21
25
29
23
27
31
35
37
39
33
22
26
30
24
28
32
36
38
40
34
COM1 (+V)
OUT23
OUT21
0V1
OUT22
OUT20
OUT18
OUT17
OUT16
OUT19
COM0 (+V)
OUT15
OUT13
0V0
OUT14
OUT12
OUT10
OUT09
OUT08
OUT11
COM0 (+V)
OUT07
OUT05
0V0
OUT06
OUT04
OUT02
OUT01
OUT00
OUT03
Connector
pin
Signal
name
Signal
name
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
• Be sure to wire both pins 21 and 22 (COM0 (+V)).
• Be sure to wire both pins 1 and 2 (COM1 (+V)).
• Be sure to wire both pins 23 and 24 (0V0).
• Be sure to wire both pins 3 and 4 (0V1).
24 VDC
24 VDC
NX-OD/OC
26
● Transistor Output Units (Fujitsu Connector, 30 mm Width)
NX-OD6121-6
Unit name Transistor Output Unit Model NX-OD6121-6
Number of points 32 points External connection
terminals Fujitsu connector (40 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage
range 10.2 to 28.8 VDC
Maximum value of load
current 0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at 100
VDC) Dielectric strength 510 VAC between isolated circuits for 1 minute at
a leakage current of 5 mA max.
I/O power supply method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power consumption
• Connected to a CPU Unit
1.10 W max.
• Connected to a Communications Coupler Unit
0.80 W max.
Current consumption from
I/O power supply 50 mA max.
Weight 90 g max.
Circuit layout
Installation orientation and
restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit detection Not supported. Protective function Not supported.
OUT0
to OUT15
COM0
+V0
OUT16
to OUT31
COM1
+V1
+V0
COM0
+V1
COM1
I/O power
supply +
NX bus
connector
(left)
I/O power
supply −
NX bus
connector
(right)
I/O power
supply +
I/O power
supply −
Internal circuits
Connector
A1
A3
A5
A2
A4
A6
A8
A9
A10
A7
OUT0
OUT2
OUT4
OUT1
OUT3
OUT5
OUT7
COM0
+V0
OUT6
A11
A13
A15
A12
A14
A16
A18
A19
A20
A17
B1
B3
B5
B2
B4
B6
B8
B9
B10
B7
B11
B13
B15
B12
B14
B16
B18
B19
B20
B17
Connector
pin Signal
name
Signal
name
OUT16
OUT18
OUT20
OUT17
OUT19
OUT21
OUT23
COM1
+V1
OUT22
12 to 24 VDC 12 to 24 VDC
OUT8
OUT10
OUT12
OUT9
OUT11
OUT13
OUT15
COM0
+V0
OUT14
OUT24
OUT26
OUT28
OUT25
OUT27
OUT29
OUT31
COM1
+V1
OUT30
• Be sure to wire both pins A9 and A19 (COM0).
• Be sure to wire both pins B9 and B19 (COM1).
• Be sure to wire both pins A10 and A20 (+V0).
• Be sure to wire both pins B10 and B20 (+V1).
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
NX-OD/OC
27
● Relay Output Unit (Screwless Clamping Terminal Block 12 mm, Width)
NX-OC2633
* Electrical service life will vary depending on the current value. Refer to "NX-series Digital I/O Units User’s Manual" for details.
Unit name Relay Output Units Model NX-OC2633
Number of points 2 points, independent contacts External connection
terminals Screwless clamping terminal block (8 terminals)
I/O refreshing method Free-Run refreshing
Indicators
TS indicator, output indicator Relay type N.O. contact
Maximum switching
capacity
250 VAC/2 A (cosφ = 1),
250 VAC/2 A (cosφ = 0.4),
24 VDC/2 A, 4 A/Unit
Minimum switching
capacity 5 VDC, 1 mA
Relay service life Electrical: 100,000 operations*
Mechanical: 20,000,000 operations ON/OFF response time 15 ms max./15 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Relay isolation
Insulation resistance
Between A1/B1 terminals and A3/B3 terminals:
20 MΩ min. (500 VDC)
Between the external terminals and internal
circuits: 20 MΩ min. (500 VDC)
Between the internal circuit and GR terminal: 20
MΩ min. (100 VDC)
Between the external terminals and GR terminal:
20 MΩ min. (500 VDC)
Dielectric strength
Between A1/B1 terminals and A3/B3 terminals:
2300 VAC for 1 min at a leakage current of 5 mA
max.
Between the external terminals and GR terminal:
2300 VAC for 1 min at a leakage current of 5 mA
max.
Between the external terminals and internal
circuits: 2300 VAC for 1 min at a leakage current
of 5 mA max.
Between the internal circuit and GR terminal: 510
VAC for 1 min at a leakage current of 5 mA max.
Vibration resistance
Conforms to IEC60068-2-6.
5 to 8.4 Hz with amplitude of 3.5 mm, 8.4 to 150
Hz, acceleration of 9.8 m/s2
100 min each in X, Y, and Z directions
(10 sweeps of 10 min each = 100 min total)
Shock resistance 100 m/s2, 3 times each in X, Y, and Z directions
I/O power supply method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power consumption
•Connected to a CPU Unit
1.20 W max.
•Connected to a Communications Coupler Unit
0.80 W max.
I/O current consumption No consumption
Weight 65 g max.
Circuit layout
Installation orientation and
restrictions
Installation orientation:
•Connected to a CPU Unit: Possible in upright installation.
•Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/
Short-circuit
detection
Not supported. Protective function Not supported.
0 to 1
C0 to C1
You cannot replace the relay.
NX bus
connector
(left)
Terminal block
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Internal circuits
Internal power
supply
Relay Output
Unit
NX-OC2633
Load
Load
0
1
A1 B1
A8 B8
C0
C1
NCNC
NC NC
NX-OD/OC
28
● Relay Output Unit
NX-OC2733
Unit name Relay Output Unit Model NX-OC2733
Number of points 2 points, independent contacts External connection
terminals
Screwless clamping terminal block (8
terminals)
I/O refreshing method Free-Run refreshing
Indicators
TS indicator, output indicator
Maximum switching
capacity
250 VAC/2 A (cosφ = 1),
250 VAC/2 A (cosφ = 0.4),
24 VDC/2 A,
4 A/Unit
Minimum switching
capacity 5 VDC, 10 mA
Relay service life Electrical: 100,000 operations
Mechanical: 20,000,000 operations ON/OFF response time 15 ms max./15 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Relay isolation
Insulation resistance
Between A1/3, B1/3 terminals and A5/7,
B5/7 terminals: 20 MΩ min. (
at
500 VDC)
Between the external terminals and
functional ground terminal: 20 MΩ min. (
at
500 VDC)
Between the external terminals and
internal circuits: 20 MΩ min. (
at
500 VDC)
Between the internal circuit and the
functional ground terminal: 20 MΩ min. (
at
100 VDC)
Dielectric strength
Between A1/3, B1/3 terminals and A5/7,
B5/7 terminals: 2300 VAC for 1 min at a
leakage current of 5 mA max.
Between the external terminals and the
functional ground terminal: 2300 VAC for 1
min at a leakage current of 5 mA max.
Between the external terminals and
internal circuits: 2300 VAC for 1 min at a
leakage current of 5 mA max.
Between the internal circuit and the
functional ground terminal: 510 VAC for 1
min at a leakage current of 5 mA max.
I/O power supply
method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.30 W max.
• Connected to a Communications
Coupler Unit
0.95 W max.
Current consumption
from I/O power supply No consumption
Weight 70 g max.
Circuit layout
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnection/Short-
circuit detection Not supported. Protective function Not supported.
NO0 to NO1
NC0 to NC1
Internal circuits
Internal power
supply
NO0 and NO1 are normal open contacts, and NC0 and NC1 are normal close contacts.
You cannot replace the relay.
Terminal block
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(left)
NX bus
connector
(right)
C0 to C1
Load NO0
C0
A1 B1
A8 B8
NC0
C0
NC1NO1
C1 C1
Relay Output
Unit
NX-OC2733
Load
29
NX-OD/OC
● Relay Output Units (Screwless Clamping Terminal Block, 24 mm Width)
NX-OC4633
Unit name Relay Output Unit Model NX-OC4633
Number of points 8 points, independent contacts External connection
terminals
Screwless clamping terminal block (8
terminals x 2)
I/O refreshing method Free-Run refreshing
Indicators
TS indicator, output indicator Relay type N.O. contact
Maximum switching
capacity
250 VAC/2 A (cosφ = 1),
250 VAC/2 A (cosφ = 0.4),
24 VDC/2 A,
8 A/Unit
Minimum switching
capacity 5 VDC, 1 mA
Relay service life Electrical: 100,000 operations*
Mechanical: 20,000,000 operations ON/OFF response time 15 ms max./15 ms max.
Dimensions 24 (W) x 100 (H) x 71 (D) Isolation method Relay isolation
Insulation resistance
Between output bits: 20 MΩ min. (at 500
VDC)
Between the external terminals and the
functional ground terminal: 20 MΩ min. (at
500 VDC)
Between the external terminals and
internal circuits: 20 MΩ min. (at 500 VDC)
Between the internal circuit and the
functional ground terminal: 20 MΩ min. (at
100 VDC)
Dielectric strength
Between output bits: 2300 VAC for 1 min at
a leakage current of 5 mA max.
Between the external terminals and the
functional ground terminal: 2300 VAC for 1
min at a leakage current of 5 mA max.
Between the external terminals and
internal circuits: 2300 VAC for 1 min at a
leakage current of 5 mA max.
Between the internal circuit and the
functional ground terminal: 510 VAC for 1
min at a leakage current of 5 mA max.
Vibration resistance
Conforms to IEC 60068-2-6.
5 to 8.4 Hz with amplitude of 3.5 mm, 8.4 to
150 Hz, acceleration of 9.8 m/s2
100 min each in X, Y, and Z directions (10
sweeps of 10 min each = 100 min total)
Shock resistance 100 m/s2, 3 times each in X, Y, and Z
directions
I/O power supply
method Supply from external source Current capacity of I/O
power supply terminal Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
2.00 W max.
• Connected to a Communications
Coupler Unit
1.65 W max.
Current consumption
from I/O power supply No consumption
Weight 140 g max.
Circuit layout
0 to 7
C0 to C7
You cannot replace the relay.
Terminal block
Internal circuits
Internal power
supply
NX bus
connector
(left)
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
NX-OD/OC
30
* Electrical service life will vary depending on the current value. Refer to "NX-series Digital I/O Units User’s Manual" for details.
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal connection
diagram
60504030201005545
(8A, 45°C)
8
4
2
0
6
10
12
(4A, 55°C)
(A)
Output current/Unit -
Ambient temperature characteristics
Ambient temperature
Output current/Unit
(°C)
0
1
A1 B1
A8 B8
C0
C1
C22
3C3
Relay Output Unit NX-OC4633
4
5
C1 D1
C8 D8
C4
C5
C66
7C7
Load
Load
31
NX-OD/OC
Version Information
Connecting with CPU Units
Refer to the user's manual for the CPU Unit for the CPU Unit to which NX Units can be connected.
* Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version, support is provided by the
oldest available version after the specified version. Refer to the user's manuals for the specific Units for the relation between models and
versions.
Connecting with Coupler Units
*1. Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version, support is provided by the
oldest available version after the specified version. Refer to the user’s manuals for the specific Units for the relation between models and
versions.
*2. If you use a CPU Unit, the instructions for time stamp refreshing are supported by CPU Units with unit version 1.06 or later. If you do not use
instructions for time stamp refreshing, you can use version 1.05. Refer to the instructions reference manual for the connected CPU Unit or
Industrial PC for details on the instructions for time stamp refreshing.
NX Unit Corresponding versions *
Model Unit version CPU Unit Sysmac Studio
NX-OD2154
Ver.1.0 Ver.1.13 or later Ver.1.17 or higher
NX-OD2258
NX-OD3121
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268
NX-OD4121
NX-OD4256
NX-OD5121
NX-OD5121-1
NX-OD5121-5
NX-OD5256
NX-OD5256-1
NX-OD5256-5
NX-OD6121-5
NX-OD6121-6
NX-OD6256-5
NX-OC2633
NX-OC2733
NX-OC4633
NX Unit Corresponding versions *1
Model Unit version
EtherCAT EtherNet/IP
Communications
Coupler Unit
NJ/NX-series
CPU Units or
NY-series
Industrial PCs
Sysmac Studio Communications
Coupler Unit Sysmac Studio
NX-OD2154
Ver.1.0
Ver.1.1 or later Ver.1.06 or later
*2 Ver.1.07 or higher --- ---
NX-OD2258
NX-OD3121
Ver.1.0 or later Ver.1.05 or later
Ver.1.06 or higher
Ver.1.0 or later
Ver.1.10 or higher
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268 Ver.1.13 or higher Ver.1.13 or higher
NX-OD4121
Ver.1.06 or higher Ver.1.10 or higherNX-OD4256
NX-OD5121
NX-OD5121-1 Ver.1.13 or higher Ver.1.13 or higher
NX-OD5121-5 Ver.1.10 or higher Ver.1.10 or higher
NX-OD5256 Ver.1.06 or higher
NX-OD5256-1 Ver.1.13 or higher Ver.1.13 or higher
NX-OD5256-5 Ver.1.10 or higher Ver.1.10 or higher
NX-OD6121-5
NX-OD6121-6 Ver.1.13 or higher Ver.1.13 or higher
NX-OD6256-5 Ver.1.10 or higher
Ver.1.10 or higherNX-OC2633 Ver.1.06 or higher
NX-OC2733 Ver.1.08 or higher
NX-OC4633 Ver.1.17 or higher Ver.1.17 or higher
NX-OD/OC
32
External Interface
Screwless Clamping Terminal Block Type
Terminal Blocks
Symbol Name Function
(A) NX bus connector This connector is used to connect each Unit.
(B) Indicators The indicators show the current operating status of the Unit.
(C) Terminal block The terminal block is used to connect external devices.
The number of terminals depends on the type of Unit.
Symbol Name Function
(A) Terminal number
indications
Terminal numbers for which A and B indicate the column, and 1 to 8 indicate the line are displayed.
The terminal number is a combination of column and line, i.e. A1 to A8 and B1 to B8.
The terminal number indications are the same regardless of the number of terminals on the terminal block.
(B) Release holes Insert a flat-blade screwdriver into these holes to connect and remove the wires.
(C) Terminal holes The wires are inserted into these holes.
(A)
(C)
(B)
(A)
(C)
(B)
NX Units (12 mm Width) NX Units (24 mm Width)
8-terminal type
(B)
12-terminal type 16-terminal type
(C)
(A)
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
(B)
(C)
A1
A2
A3
A4
A5
A6
A7
A8
D1
D2
D3
D4
D5
D6
D7
D8
24 mm Width
8-terminal type ×2
33
NX-OD/OC
Applicable Terminal Blocks for Each Unit Model
Unit model Terminal Blocks
Model No. of terminals Ground terminal mark
Terminal current capacity
NX-OD2@@@ NX-TBA082 8 None 10 A
NX-OD3@@@
(any model other than
NX-OD3268)
NX-TBA122 12 None 10 A
NX-OD3268
NX-OD4@@@ NX-TBA162 16 None 10 A
NX-OD5@@@ NX-TBA162 16 None 10 A
NX-OC2@@@ NX-TBA082 8 None 10 A
NX-OC4633 NX-TBA082 8 None 10 A
NX-TBB082 8 None 10 A
NX-OD/OC
34
Applicable Wires
Using Ferrules
If you use ferrules, attach the twisted wires to them.
Observe the application instructions for your ferrules for the wire stripping length when attaching ferrules.
Always use plated one-pin ferrules. Do not use unplated ferrules or two-pin ferrules.
The applicable ferrules, wires, and crimping tool are given in the following table.
* Some AWG 14 wires exceed 2.0 mm2 and cannot be used in the screwless clamping terminal block.
When you use any ferrules other than those in the above table, crimp them to the twisted wires so that the following processed dimensions are
achieved.
Using Twisted Wires/Solid Wires
If you use the twisted wires or the solid wires, use the following table to determine the correct wire specifications.
*1. Secure wires to the screwless clamping terminal block. Refer to the Securing Wires in the USER'S MANUAL for how to secure wires.
*2 With the NX-TB@@@1 Terminal Block, use twisted wires to connect the ground terminal. Do not use a solid wire.
<Additional Information> If more than 2 A will flow on the wires, use plated wires or use ferrules.
Terminal types Manufacturer Ferrule model
number
Applicable wire
(mm2 (AWG)) Crimping tool
Terminals other
than ground
terminals
Phoenix Contact AI0,34-8 0.34 (#22) Phoenix Contact (The figure in parentheses is the applicable wire size.)
CRIMPFOX 6 (0.25 to 6 mm2, AWG24 to 10)
AI0,5-8 0.5 (#20)
AI0,5-10
AI0,75-8 0.75 (#18)
AI0,75-10
AI1,0-8 1.0 (#18)
AI1,0-10
AI1,5-8 1.5 (#16)
AI1,5-10
Ground terminals AI2,5-10 2.0 *
Terminals other
than ground
terminals
Weidmuller H0.14/12 0.14 (#26) Weidmuller (The figure in parentheses is the applicable wire size.)
PZ6 Roto (0.14 to 6 mm2, AWG 26 to 10)
H0.25/12 0.25 (#24)
H0.34/12 0.34 (#22)
H0.5/14 0.5 (#20)
H0.5/16
H0.75/14 0.75 (#18)
H0.75/16
H1.0/14 1.0 (#18)
H1.0/16
H1.5/14 1.5 (#16)
H1.5/16
Terminals Wire type
Wire size Conductor length
(stripping length)
Twisted wires Solid wire
Classification Current capacity Plated Unplated Plated Unplated
All terminals except
ground terminals
2 A max.
Possible
Possible Possible Possible
0.08 to 1.5 mm2
AWG28 to 16 8 to 10 mm
Greater than
2 A and 4 A or less Not
Possible
Possible
*1 Not
Possible
Greater than
4 A
Possible
*1
Not
Possible
Ground terminals --- Possible Possible Possible
*2
Possible
*2 2.0 mm29 to 10 mm
Finished Dimensions of Ferrules
1.6 mm max. (except ground terminals)
2.0 mm max. (ground terminals)
2.4 mm max. (except ground terminals)
2.7 mm max. (ground terminals)
8 to 10 mm
Conductor length (stripping length)
NX-OD/OC
35
M3 Screw Terminal Block Type
NX Units (30 mm Width)
Connector Types
NX Units (30 mm Width)
● Units with MIL Connectors (1 Connector with 20 Terminals)
Letter Name Function
(A) NX bus connector This connector is used to connect each Unit.
(B) Indicators The indicators show the current operating status of the Unit.
(C) Screw terminals These screw terminals are used to connect the wires.
Letter Name Function
(A) NX bus connector This connector is used to connect each Unit.
(B) Indicators The indicators show the current operating status of the Unit.
(C) Connectors The connectors are used to connect to external devices.
(C)
(B)
(A)
(C)
(B)
(A)
NX-OD/OC
36
● Units with MIL Connectors (1 Connector with 40 Terminals)
● Units with Fujitsu Connectors (1 Connector with 40 Terminals)
Letter Name Function
(A) NX bus connector This connector is used to connect each Unit.
(B) Indicators The indicators show the current operating status of the Unit.
(C) Connectors The connectors are used to connect to external devices.
Letter Name Function
(A) NX bus connector This connector is used to connect each Unit.
(B) Indicators The indicators show the current operating status of the Unit.
(C) Connectors The connectors are used to connect to external devices.
(C)
(B)
(A)
(C)
(B)
(A)
37
NX-OD/OC
Dimensions (Unit/mm)
Screwless Clamping Terminal Block Type
12 mm Width
* The dimension is 1.35 mm for Units with lot numbers through December 2014.
24 mm Width
14.1
12.0
100
1.5
1.5
104.5
65.2
80.1
71
0.55 *
26.1
24.0
C D
CD
80.1
71
104.5
100
65.2
1.5 1.5
0.55
NX-OD/OC
38
M3 Screw Terminal Block Type
30 mm Width
Connector Types
30 mm Width
● Units with MIL Connectors (1 Connector with 20 Terminals)
30
32.1 71
95
1.5
100
1.5
65.2
104.5
16.1
16.1
27.85
32.1
19.1
30
100
58.3
1.5
1.5 65.2
89.52
71
104.5
NX-OD/OC
39
● Units with MIL Connectors (1 Connector with 40 terminals)
●Units with Fujitsu Connectors (1 Connector with 40 Terminals)
16.1
38
32.1
19.1
30
100
83.7
1.5
1.5 65.2
89.52
71
104.5
1.5
100
1.5
72.5
(118.5)
71
65.2
104.5
16.1
32.1
19.4
30
38
NX-OD/OC
40
Related Manuals
Cat. No. Model number Manual name Application Description
W521
NX-IA@@@@
NX-ID@@@@
NX-OD@@@@
NX-OC@@@@
NX-MD@@@@
NX-series Digital I/O
Units User’s Manual
Learning how to use NX-series
Digital I/O Units
The hardware, setup methods, and functions of the NX-
series Digital I/O Units are described.
Terms and Conditions Agreement
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have any questions or comments.
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NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
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AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
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Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
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Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
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Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
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any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2016
.
10
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2016 All Right Reserved.