1
CSM_EE-SX91_DS_E_7_2
Compact Pre-wired Photomicrosensor with Built-in Amplifier (Non-modulated)
EE-SX91
Meeting Customer Needs with Compact
Sensors that Mount with M3 Screws
• Both light-ON and dark-ON outputs provided.
• A compact size and choice of five models for a wide
range of applications.
• Compact NPN and PNP output models.
• Safer operation with built-in power supply reverse polarity protection.
• Output overcurrent protection with a thermal shutdown circuit (patent
pending). *
• Mount using M3 or M2 screws.
• Indicator is visible in many directions for installation
in any location.
• Flexible robot cables are standard on all models.
* Output overcurrent protection is provided only on output 2 (OUT2) on NPN models.
Be sure to read Safety Precautions on
page 6.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Features
A Compact Size and Choice of Five Models
for a Wide Range of Applications
Select any of five models to minimize the space required.
Compact NPN and PNP Output Models
Both NPN and PNP output models are available for use according to
system requirements.
Safer Operation with Built-in Power Supply
Reverse Polarity Protection
The built-in power supply reverse polarity protection protects against
reverse connection of the power supply or outputs for safer operation
at the assembly site.
Flexible Robot Cables: Standard on All Models
Robot Cables are effective for moving parts, and are provided as
standard equipment with all models.
Both Light-ON and Dark-ON Outputs
Both light-ON and dark-ON outputs are provided on all models,
allowing outputs to be switched by simply changing the wiring
according to the application.
Indicator Visible from Many Directions for
Installation in Any Location
The light indicator can be checked from up to four directions.
Mount Using M3 or M2 Screws
The EE-SX91 can be mounted using M3 or M2 screws, so it can
easily replace an existing compact sensor mounted with M2 screws.
Reverse polarity protection
NPN
GND (0 V)
OUT2
OUT1
(Control
output)
(Control output)
Vcc
Load 1
5 to
24 VDC
Load 2
Main
circuit
Light indicator
(orange)
2
EE-SX91
Ordering Information
List of Models
Models with Robot Cables
* Prewired models with a 3-m cable are also available. When ordering, specify the cable length by adding “3M” for the end of the model number (e.g., EE-SX910-R 3M).
Appearance Sensing
method
Sensing
distance
Output
configuration
Indicator
mode
Connecting
method
(Cable length)
Model
NPN output PNP output
Standard
Through-
beam type
(with slot)
Light-ON
Dark-ON
(2 outputs)
Lit when light
is incident
Pre-wired models
(1 m)
EE-SX910-R 1M *EE-SX910P-R 1M *
L-shaped
EE-SX911-R 1M *EE-SX911P-R 1M *
F-shaped
EE-SX912-R 1M *EE-SX912P-R 1M *
R-shaped
EE-SX913-R 1M *EE-SX913P-R 1M *
U-shaped
EE-SX914-R 1M *EE-SX914P-R 1M *
Infrared light
5 mm
(slot width)
EE-SX91
3
Ratings and Specifications
*1. The differential distance is the value when a sensing object is moved in a lateral direction to the slot.
*2. The response frequency was measured by detecting the following rotating disk.
Item
Type Standard L-shaped F-shaped R-shaped U-shaped
NPN
models Pre-wired models EE-SX910-R EE-SX911-R EE-SX912-R EE-SX913-R EE-SX914-R
PNP
models Pre-wired models EE-SX910P-R EE-SX911P-R EE-SX912P-R EE-SX913P-R EE-SX914P-R
Sensing distance 5 mm (slot width)
Sensing object Opaque: 1.2 × 0.8 mm min.
Differential distance 0.025 mm max. *1
Light source GaAs infrared LED with a peak wavelength of 940 nm
Indicator Light indicator (orange LED)
Supply voltage 5 to 24 VDC ±10%, ripple (p-p): 10% max.
Current consumption 21 mA max.
Control output
Load power supply voltage: 5 to 24 VDC
Load current: 50 mA max.
OFF current: 0.5 mA max.
50 mA load current with a residual voltage of 1.0 V max.
5 mA load current with a residual voltage of 0.4 V max.
Protection circuits Power supply reverse polarity protection; output reverse polarity protection
(only OUT2 on models with NPN output)
Response frequency 1 kHz min. (3 kHz average) *2
Ambient illumination 1,000 lx max. with fluorescent light on the surface of the receiver
Ambient temperature range Operating: −25 to 55°C
Storage: −30 to 80°C (with no icing or condensation)
Ambient humidity range Operating: 5% to 85%
Storage: 5% to 95% (with no icing or condensation)
Vibration resistance (Destruction) 10 to 2,000 Hz (peak acceleration: 150m/s2)
0.75-mm single amplitude for 2.5 h (15-min periods, 10 cycles) each in X, Y, and Z directions
Shock resistance (Destruction) 500 m/s2 for 3 times each in X, Y, and Z directions
Degree of protection IEC60529 IP50
Connecting method Pre-wired Models (standard cable length: 1 m)
Weight
(packed state) Pre-wired Models Approx. 17 g
Mate-
rials
Case/cover Polybutylene phthalate (PBT)
Emitter/receiver Polycarbonate (PC)
Disk
1 mm1 mm
2.1 mm
t = 0.2 mm
4
EE-SX91
Engineering Data (Reference Value)
Sensing Position Characteristics
EE-SX910 EE-SX910 EE-SX911
Repeated Sensing Position Characteristics
EE-SX910
0123456
Dark-ON
Light-ON
Distance d (mm)
Insertion
direction
d
0123456
d
Dark-ON
Light-ON
Insertion direction
Distance d (mm)
0123456
Dark-ON
Light-ON
Insertion
direction
Distance d (mm)
d
3.14 3.16 3.18 3.2
d
Dark-ON
Light-ON
Vcc = 24 V, No. of repetitions: 20, Ta = 25°C
(Differential distance = 0.025 mm max.)
Distance d (mm)
d=±0.002
Note: The data applies to dark status. Operation may be affected by external light
interference or light coming through the sensing object.
EE-SX91
5
I/O Circuit Diagrams
Output
type Model Output transistor
operation status Timing charts Output circuit
NPN
output
EE-SX910-R
EE-SX911-R
EE-SX912-R
EE-SX913-R
EE-SX914-R
OUT1: Light-ON
OUT2: Dark-ON
PNP
output
EE-SX910P-R
EE-SX911P-R
EE-SX912P-R
EE-SX913P-R
EE-SX914P-R
Light incident
Light interrupted
GND (0 V)
OUT2
OUT1
(Control
output)
(Control output)
Vcc
Load 1
5 to
24 VDC
Load 2
Main
circuit
Light indicator
(orange)
ON
OFF
Light indicator
(orange)
ON
OFF
Output 1
transistor
Operates
Releases
Load 1
(e.g., relay)
GND (0 V)
OUT2
OUT1
(Control
output)
(Control output)
Vcc
Load 1
5 to
24 VDC
Load 2
Main
circuit
Light indicator
(orange)
ON
OFF
Output 2
transistor
Load 2
Operates
Releases
(e.g., relay)
6
EE-SX91
Safety Precautions
Refer to Warranty and Limitations of Liability.
This product is not designed or rated for ensuring
safety of persons either directly or indirectly. Do not
use it for such purposes.
• Power Supply Voltage
Do not exceed the voltage range
indicated in the specifications.
Applying a voltage exceeding
the specifications or using an AC
power supply may result in
rupture or burning.
•Faulty Wiring
Do not reverse the power supply
polarity. Doing so may result in
rupture or burning.
• Do not short-circuit the load. (Do
not connect to the power
supply.)
Doing so may result in rupture or
burning.
• Dispose of this product as
industrial waste.
● Installation
• It is assumed that EE-SX91 Sensors will be built into a device.
These Sensors use non-modulated light and are not equipped to
deal with interference from an external light source. When they are
used in locations subject to external light interference, such as near
a window or under an incandescent light, install them to minimize
the effects of external light interference.
• Mount the Sensors securely on a flat surface.
• Use M3 or M2.0 screws to secure the Photomicrosensor. (The
stronger M3 screws are recommended. In addition, use flat
washers and spring washers to prevent the screws from loosening.)
Refer to the following table for the correct tightening torque.
• If the Sensor is to be used on a moving part, secure the cable
connection point so that it is not directly subjected to stress.
● Wiring
Unused Output Lines
Be sure to isolate output lines that are not going to be used.
Connecting to Devices with Voltage Input Specifications
A Sensor with an open-collector output can be connected to a counter
with a voltage input by connecting a resistor between the power
source and output. Select a resistor with reference to the following
example. The resistance of the resistor is generally 4.7 kΩ and its
wattage is 1/2 W for a supply voltage of 24 V and 1/4 W for 12 V.
Example: EE-SX91 Series
Load Resistance of 4.7 kΩ Connected in a Counter
Counter Specifications
The high and low levels are found using the following formulas. The
input device specifications must satisfy both formulas.
High level:
Low level:
Input voltage VL ≤ 1.0 V (Residual voltage for 50-mA load current)
Note: Refer to the ratings of the Sensor for the residual voltage of the load
current.
WARNING
Precautions for Safe Use
Sensor
Brown
Blue
Load
Load
Black
White
Sensor
Brown
Blue
Black
White
−
+
Load
Load
+
Sensor
Brown
Blue
+
−
Black
White
Load
d short-circuit)
(Loa
Load
ck
(
Precautions for Correct Use
Screw diameter Tightening torque
M2.0 0.15 N·m max.
M3 0.54 N·m max.
Input impedance 5.6 KΩ
Voltage judged as high level (input ON) 4.5 to 30 VDC
Voltage judged as low level (input OFF) 0 to 2 VDC
SW
main
circuit
Tr
+Vcc
EE-SX91 series Counter (Voltage input type)
Insert a resistor
Output
0 V 0 V
R
24 V
Power supply
Z
Input terminal (CP)
(Input impedance:
approx. 5.6 kΩ)
Input voltage VH = R+Z
ZVcc = 4.7 k+5.6 k
5.6 k × 24 V = 13 V
Load current Ic = R
Vcc = = 5.1 mA ≤ 50 mA
R
24 V
EE-SX91
7
● Other Precautions
• Do not disconnect wire the cables from the Sensor when power is
supplied to the Sensor, or Sensor damage could result.
• Do not install the Sensor in the following places to prevent
malfunction or trouble:
1. Places exposed to dust or oil mist
2. Places exposed to corrosive gas
3. Places directly or indirectly exposed to water, oil, or chemicals
4. Outdoor or places exposed to intensive light, such as direct
sunlight
• Be sure to use the Sensor under the rated ambient temperature.
• The Sensor may be dissolved by exposure to organic solvents,
acids, alkali, or aromatic hydrocarbons, aliphatic chloride
hydrocarbons causing deterioration in characteristics. Do not
expose the Sensor to such chemicals.
• Make sure the total length of the power cable connected to the
product is less than 10 m.
• Only output 2 (OUT2) on NPN models is provided with overcurrent
protection.
If an overcurrent occurs, heat generated by the output transistor will
activate the thermal shutdown circuit and OUT2 will turn OFF.
Check the wiring and load current and cycle the power supply. If
there is no overcurrent, normal operation will be resumed. (The
thermal shutdown circuit will be activated again if there is an
overcurrent.)
This function does not provide protection against load short circuits.
If the electric power of the output transistor increases due to a load
short-circuit or near load short-circuit, the Sensor may be damaged.
• An output pulse may occur when the power supply is turned ON
depending on the power supply and other conditions. The operation
of the Sensor will be stable 100 ms after turning ON the power
supply.
8
EE-SX91
Dimensions (Unit: mm) Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified.
Photomicrosensors
6
24
Optical axis
Optical axis
Sensing window
3
EE-SX910-R
1.2 0.8
5.8
Indicator window
5
3.7
13.4
8.3
2.7
5
4.6
dia.
(2)
2.3
18.7
Two, 3.2 dia.
6.5
12 8
Robot cable
of 2.8 dia., 4 cores,
(0.15 mm2 with 0.8-mm dia. insulator);
Standard length: 1 m
EE-SX910-R
EE-SX910P-R
Optical axis
Optical axis
Indicator window
Sensing
window
(2)
10
6.9
3.7
2
3
5
0.8
1.75
1.6 3.2
8
612
6
1.2
13.4
4
12
6.5
EE-SX911-R
(Four, R1.6)
Robot cable of 2.8 dia., 4 cores,
(0.15 mm2 with 0.8-mm dia.
insulator);
Standard length: 1 m
EE-SX911-R
EE-SX911P-R
Sensing window
Optical axis
Optical axis
Indicator window
EE-SX912-R
1.95 1.6
3.2 2 dia.
4.6 dia.
3.7
11.7
6.2
12 8
5
13.4
3
5
(2)
4
1.5
6.7
1.2
2.3
0.8 8.3
6.5
(R1.6)
6
Robot
cable of 2.8 dia., 4 cores,
(0.15 mm2 with 0.8-mm dia.
insulator);
Standard length: 1 m
*
* The lug is used to prevent turning. When installing, make a fixed hole of 2.1 to 2.3 mm dia.
EE-SX912-R
EE-SX912P-R
*
Indicator window
Optical axis
Optical axis
Sensing window
5
13.4
3.7
2 dia. 2.3
4.6 dia.
812
1.5 (2)
6.7
4
6
11.7
3
5
6.2
3.2
1.6 1.95
1.2
0.8
EE-SX913-R
(R1.6)
8.3 6.5
Robot cable of 2.8 dia., 4 cores,
(0.15 mm2 with 0.8-mm dia.insulator);
Standard length: 1 m
* The lug is used to prevent turning. When installing, make a fixed hole
of 2.1 to 2.3 mm dia.
EE-SX913-R
EE-SX913P-R
Two, 3.2 dia.
Indicator window
Indicator window
Sensing window
Optical axis
Optical axis
16
6.5
11.5
13.4
5
3.7
(2) 1.2
0.8
63
8.3 8.3
8
EE-SX914-R
Robot cable of 2.8 dia., 4 cores,
(0.15 mm2 with 0.8-mm dia. insulator);
Standard length: 1 m
EE-SX914-R
EE-SX914P-R