page 1/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Opto 22 SNAP “D Series” racks are designed for discrete
control applications and can accommodate 4, 6, 8, or 12 SNAP
4-channel digital modules. These racks use an industry-standard
50-pin header connector, which allows them to be used in a
variety of applications.
The logic side of the I/O circuitry can be controlled directly
or by using an Opto 22 PCIe-AC5 (PCI Express bus), PCI-AC5 (PCI
bus) or G4AC5 or AC5 (ISA bus) PC adapter card. In addition,
the 4-module position SNAP-D4M can be used with Opto 22’s
Classic brain boards. These boards use one of Opto 22’s industry-
standard protocols (Mistic®
, Optomux®
, or Pamux®) to control
the I/O, and communicate either serially or in parallel.
The MC and MC-P model racks provide an auxiliary screw-
type terminal strip for additional wiring requirements. The MC
racks use a fixed terminal strip while the MC-P uses removable
connectors for easy maintenance (see enlarged view below).
Field devices are wired directly to the top-mounted
removable connectors on the SNAP I/O®
modules. The module
and rack design allows modules to simply “snap” on and off the
mounting rack. SNAP racks use a retention rail locking system
that holds modules securely to the rack. Normally, a hold-down
screw is not required. However, for applications that require
additional mounting security, SNAP racks have provisions for
two 4-40 by ½-inch standard machine screws to hold each
module in position. All SNAP racks offer panel mounting and
the option of DIN-rail mounting. SNAP racks use a single 5 VDC
power source.
SNAP-D4M 4-Module Position
I/O Mounting Rack
Description
Pluggable
Connector for
MC-P Models
Part N umb er Ordering Gu ide
SNAP-D4MC SN AP I/O mounting ra ck: Digital 4-module rack
with header connector. Commo n te r minal block
SNAP-D4MC-P SN AP I/O mounting rack: Digital 4-modu le rack with
header con necto r. C omm on terminal block pluggable
SNAP-D6MC SN AP I/O mounting ra ck: Digital 6-module rack
with header connector. Commo n te r minal block
SNAP-D6MC-P SN AP I/O mounting rack: Digital 6-modu le rack with
header con necto r. C omm on terminal block pluggable
SNAP-D8MC SN AP I/O mounting ra ck: Digital 8-module rack
with header connector. Commo n te r minal block
SNAP-D8MC-P SN AP I/O mounting rack: Digital 8-modu le rack with
header con necto r. C omm on terminal block pluggable
SNAP-D12MC SNAP I/O mounting ra ck: Digital 12-module rack
with header connector. Commo n te r minal block
SNAP-D12MC-P SN AP I/O mounting rack: Digital 12-mod ule rack with
header con necto r. C omm on ter m inal block pluggable
SNAP-CDBBN Classi c dig ital brain b oard DIN-rail adapter
SNAP-FUSE1A SNAP 1-Amp fuse
SNAP-TEX-DR C10 SNAP PAC rack DIN-rail adapter clip
page 2/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Notes
1. Even pins on control connector are connected common to +5V RTN.
2. Pin 1 of control connector J1 is connected common to +5V through jumper JP1.
3. Pin 49 of control connector J1 is connected common to +5V through jumper JP2.
4. For operation of SNAP-D4MC/MC-P with Classic plug-in
brain boards (B100, B1, and B5), install jumpers JP1 and JP2.
5. For operation with PC adapter cards (i.e. G4AC5), remove jumpers JP1 and JP2.
6. Odd numbered pins 3 through 15 of control connector are not used.
Control Connector
(50-pin male)
Module Mating
Connector Pinout
(female)
Power
Schematic
Operating Requirements
SNAP-D4MC/MC-P (4 Module Position)
Specifications
Position Channel
Position
J1
Control
Connector
00 47
145
243
341
14 39
537
635
733
28 31
929
10 27
11 25
312 23
13 21
14 19
15 17
Power Requiremen ts 5 VDC ± 0.1 VDC
@ 200mA max.
(700mA wi th brain b oard)
Operating Temperatur e R ang e 0° to 70°C
Relative Humidity 95%, non-con densing
page 3/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Notes
1. Even pins on control
connectors are connected
to +5V RTN.
2. SNAP-D6MC/MC-P is
designed to interface with PC
adapter cards (i.e. AC5 or
G4AC5). It will not work with
brain boards because there is
no power to the control
connector.
3. Pin 49 - “no” connection.
Power
Schematic
Control Connector
(50-pin male)
Module Mating
Connector Pinout
(female)
Operating Requirements
SNAP-D6MC/MC-P (6 Module Position)
Specifications
Connection Diagram for 12-position ter minal strip
(MC and MC-P models, MC shown)
For detailed information on
terminal strip, see pa ges 9-10.
Module
Position Channel
Position Control
Connector
0047
145
243
341
1439
537
635
733
2831
929
10 27
11 25
312 23
13 21
14 19
15 17
416 15
17 13
18 11
19 9
520 7
21 5
22 3
23 1
Power Requirements 5 VDC ± 0.1 VDC
@ 300mA max.
Operating Temperature Range 0° to 70°C
Relative Humidity 95%, non-condensing
page 4/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Notes
1. Even pins on control connectors are connected to +5V RTN.
2. Pin 1 of control connectors J1 and J2 is connected to +5V through jumper JP1.
3. Pin 49 of control connectors J1 and J2 is connected to +5V through jumper JP2.
4. For operation with PC adapter cards (i.e. AC5 or G4AC5), remove jumpers JP1 and JP2.
5. Odd numbered pins 3 through 15 of control connectors are not used.
Module Mating
Connector Pinout
(female)
Power
Schematic
Control Connectors
(50-pin male)
Operating Requirements
SNAP-D8MC/MC-P (8 Module Position)
Specifications
Connection Diagram for each of
the two 8-position terminal strips
(MC and MC-P models, MC shown)
For detailed information on
terminal strip, see pages 9–10.
Position Channel
Position
J1
Control
Connector
00 47
145
243
341
14 39
537
635
733
28 31
929
10 27
11 25
312 23
13 21
14 19
15 17
Power Requirements 5 VDC ± 0.1 VDC
@ 400mA max.
Operating Temperature Range 0° to 70°C
Relative Humidity 95%, non-condensing
Module
Position Channel
Position
J2
Control
Cnnector
416 47
17 45
18 43
19 41
520 39
21 37
22 35
23 33
624 31
25 29
26 27
27 25
728 23
29 21
30 19
31 17
page 5/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Notes
1. Even pins on control connectors are connected to +5V RTN.
2. SNAP-12MC/MC-P is designed to interface with PC adapter cards (i.e. AC5 or G4AC5).
It will not work with brain boards because there is no power to the control connector.
Power
Schematic
Module Mating
Connector Pinout
(female)
Control Connectors
(50-pin male)
Operating Requirements
SNAP-D12MC/MC-P (12 Module Position)
Specifications
Connection diagram for each of
the three 8-position terminal strips
(MC and MC-P models, MC shown)
For detailed information on
terminal strip, see pages 9–10.
Module
Position Channel
Position Control
Connector
0047
145
243
341
1439
537
635
733
2831
929
10 27
11 25
312 23
13 21
14 19
15 17
416 15
17 13
18 11
19 9
520 7
21 5
22 3
23 1
Power Requirements 5 VDC ± 0.1 VDC
@ 1200mA max.
Operating Temperature Range 0° to 70°C
Relative Humidity 95%, non-condensing
Module
Position Channel
Position
J2
Control
Connector
6047
145
243
341
7439
537
635
733
8831
929
10 27
11 25
912 23
13 21
14 19
15 17
10 16 15
17 13
18 11
19 9
11 20 7
21 5
22 3
23 1
page 6/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Front View (When Mounted)
Overall Length Dimension (All Models)
All Models
Dimensional Drawing
Part
Number Description Length
(inches) Length
(mm)
SNAP-D4M 4-module rack 4.19 106.43
SNAP-D6M 6-module rack 5.74 145.8
SNAP-D8M 8-module rack 7.74 196.6
SNAP-D12M 12-module rack 10.74 272.8
page 7/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Right Side View (with DIN-Rail Option)
All Models
Dimensional Drawing
page 8/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
General
If not using module hold-down screws, the SNAP rack assembly
should be mounted horizontally, as shown in diagram.
Preferred Method
Template (product on site)
1. Use SNAP rack mounting extrusion as template.
2. Be sure to use drawing to determine required product and
option clearances.
Alternate Method
Prefabrication of Panels (no product on site)
1. Mounting holes are in sets of two located on lower left and
upper right, with respect to a centerline (CL).
2. Using the drawing, determine CL1 mounting hole positions.
(CL1 is located on the left side of all SNAP rack mounting
extrusions.)
3. Use the center-to-center length specification table to
determine offset between centerlines and number of
centerline positions for each model.
4. Repeat process for each centerline position.
5. Dimensions shown in drawing apply to all models.
Typical Plain View of SNAP Mounting Extrusion
Center-to-Center Length (All Models)
All Models
Dimensional Drawing
Part Numbers Description Center to
Center Le ng th # of Cent er
Positions
SNAP-D4MC 4-m o du le ra ck with extra te rmin al
block for fi eld w iring 1.98" 2
SNAP-D4MC-P 4-m o du le ra ck wi th extra te rmin al
block for field wiring, pluggable 1.98" 2
SNAP-D6MC 6-module rack with extra terminal
block for fi eld w iring 3.53" 2
SNAP-D6MC-P 6-module rack with extra terminal
block for field wiring, pluggable 3.53" 2
SNAP-D8MC 8-module rack with extra terminal
block for fi eld w iring 5.53" 2
SNAP-D8MC-P 8-module rack with extra terminal
block for field wiring, pluggable 5.53" 2
SNAP-D12MC 12 - m od ul e r a ck wi th extra terminal
block for fi eld w iring 4.26" 3
SNAP-D12MC-P 12 - m od ul e r a ck wi th extra terminal
block for field wiring, pluggable 4.26" 3
page 9/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Terminal Strip Usa ge - Digital
Schematics
Typical Digital Input Using Terminal Strip
Typical Digital AC Output Using Terminal Strip
page 10/10
RACKS
SNAP
D SERIES
(WITH AUXILIARY TERMINAL STRIP)
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Phone: (951) 695-3000 • (800) 321-OPTO • Fax: (951) 695-3095 • www.opto22.com
Inside Sales: (800 321-OPTO • Product Support: (800)TEK-OPT O • (951) 695-3080 • Fax: (951) 695-3017 • E-mail: sales@opto22.com
DATA SHEET
Form 778-120629
Terminal Strip Usa ge - Digital
Schematics
Typical Digital DC Output (Sourcing) Using Terminal Strip
Typical Digital DC Output (Sinking) Using Terminal Strip
© 1996–2012 Opto 22. All rights reserved. All trademarks, trade names, logos, and service marks referenced herein belong to their respective companies.
More About Opto 22
www.opto22.com • Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Form 1335-110907
SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com
© 2012 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
Products
Opto 22 develops and manufactures reliable, flexible, easy-to-
use hardware and software products for industrial automation,
energy management, remote monitoring, and data
acquisition applications.
OptoEMU Energy Management System
The easy-to-use OptoEMU Sensor monitors electrical energy
use in your facility and delivers detailed, real-time data you
can see and analyze. The Sensor can monitor energy data from
pulsing meters, electrical panels or subpanels, and equipment.
View energy data online using a software service or
incorporate the data into your control system for complete
energy management.
SNAP PAC System
Designed to simplify the typically
complex process of selecting and
applying an automation system, the
SNAP PAC System consists of four
integrated components:
•SNAP PAC controllers
•PAC Project™ Software Suite
•SNAP PAC brains
•SNAP I/O™
SNAP PAC Controllers
Programmable automation controllers (PACs) are
multifunctional, modular controllers based on open standards.
Opto 22 has been manufacturing PACs for over two decades.
The standalone SNAP PAC S-series and the rack-mounted
SNAP PAC R-series both handle a wide range of digital, analog,
and serial functions for data collection, remote monitoring,
process control, and discrete and hybrid manufacturing.
SNAP PACs are based on open Ethernet and Internet Protocol
(IP) standards, so you can build or extend a system easily,
without the expense and limitations of proprietary networks
and protocols.
PAC Project Software Suite
Opto 22’s PAC Project Software Suite provides full-featured,
cost-effective control programming, HMI (human machine
interface) development and runtime, OPC server, and
database connectivity software for your SNAP PAC System.
Control programming includes both easy-to-learn flowcharts
and optional scripting. Commands are in plain English;
variables and I/O point names are fully descriptive.
PAC Project Basic offers control and HMI tools and is free for
download on our website, www.opto22.com. PAC Project
Professional, available for separate purchase, adds
OptoOPCServer, OptoDataLink, options for controller
redundancy or segmented networking, and support for legacy
Opto 22 serial mistic™ I/O units.
SNAP PAC Brains
While SNAP PAC controllers provide central control and data
distribution, SNAP PAC brains provide distributed intelligence
for I/O processing and communications. Brains offer analog,
digital, and serial functions, including thermocouple
linearization; PID loop control; and optional high-speed digital
counting (up to 20 kHz), quadrature counting, TPO, and pulse
generation and measurement.
SNAP I/O
I/O provides the local connection to sensors and equipment.
Opto 22 SNAP I/O offers 1 to 32 points of reliable I/O per
module, depending on the type of module and your needs.
Analog, digital, and serial modules are all mixed on the
same mounting rack and controlled by the same processor
(SNAP PAC brain or rack-mounted controller).
Quality
Founded in 1974, Opto 22 has established a
worldwide reputation for high-quality products. All
are made in the U.S.A. at our manufacturing
facility in Temecula, California. Because we do
no statistical testing and each part is tested
twice before leaving our factory, we can
guarantee most solid-state relays and optically
isolated I/O modules for life.
Free Product Support
Opto 22’s California-based Product Support Group offers free,
comprehensive technical support for Opto 22 products. Our
staff of support engineers represents decades of training and
experience. Support is available in English and Spanish by
phone or email, Monday–Friday, 7 a.m. to 5 p.m. PST.
Additional support is always available on our website: how-to
videos, OptoKnowledgeBase, self-training guide,
troubleshooting and user’s guides, and OptoForums.
In addition, hands-on training is available for free at our
Temecula, California headquarters, and you can register online.
Purchasing Opto 22 Products
Opto 22 products are sold directly and through a worldwide
network of distributors, partners, and system integrators. For
more information, contact Opto 22 headquarters at 800-321-
6786 or 951-695-3000, or visit our website at
www.opto22.com.
www.opto22.com
