SNAP High-Density
Digital I/O Modules
PAGE
1
DATA SHEET
Form 1556-160920
SNAP High-Density Digital I/O Modules
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Features
16 or 32 digital input points or output points in one
compact SNAP module
Up to 16 high-density digital modules on a SNAP rack,
making up to 512 digital points available on one rack
Convenient pluggable wiring harness, breakout
boards, and header cables (available separately)
1500 V of isolation protects sensitive control
electronics from industrial field signals
Rugged packaging
Description
SNAP high-density digital (HDD) modules from Opto 22
provide 16 or 32 digital input or output points in one compact
SNAP module. All HDD modules work with the SNAP PAC
System, which consists of SNAP PAC controllers and brains,
SNAP PAC racks, SNAP I/O modules, and PAC Project software.
These modules can also be used in intelligent remote I/O for
Allen-Bradley® Logix PLC systems.
SNAP high-density digital modules are ideal for OEMs and for
anyone who has high point-count applications. The high-
density point configuration reduces per-point costs of digital
I/O systems by providing up to eight times as many I/O points
in the same space.
The following high-density digital modules are available:
•The SNAP-IDC-32 or SNAP-IDC-32-FM digital input
module, with 32 input points, can be used to sense on/
off status for 10–32 VDC inputs from sources such as
proximity switches, limit switches, push buttons, and
pilot switches (PNP or sourcing type).
•The SNAP-IDC-32N is similar, but its input range is -10
to -32 VDC and its common connections are positive
rather than negative, making it ideal for NPN or sinking
type inputs.
•The SNAP-IDC-32D has an input range of 2.5 to 12 VDC.
•The SNAP-IDC-32DN offers a -2.5 to -12 VDC input
range and has positive common connections, also suited
to NPN (sinking) inputs.
•The SNAP-IDC-16 digital input module offers 16 points
with channel-to-channel isolation. It can sense on/off
status for 10–32 VDC/VAC loads.
•The SNAP-IDC-HT-16 leakage tolerant digital input
module is used with proximity switches. It offers
channel-to-channel isolation for 16 points and senses
on/off status for loads of 15–28 VDC/VAC.
Part Numbers
Part Description
Modules
SNAP-IDC-32
SNAP-IDC-32-FM*
SNAP 32-point digital input mod-
ule, 10–32 VDC
SNAP-IDC-32N
SNAP 32-point digital input mod-
ule, -10 to -32 VDC, with positive
common connection
SNAP-IDC-32D SNAP 32-point digital input mod-
ule, 2.5 to 12 VDC
SNAP-IDC-32DN
SNAP 32-point digital input mod-
ule, -2.5 to -12 VDC, with positive
common connection
SNAP-IDC-16 SNAP isolated 16-point digital
input module, 10–32 VDC/VAC
SNAP-IDC-HT-16
SNAP leakage-tolerant isolated
16-point digital input module,
15–28 VDC/VAC
SNAP-IAC-16 SNAP isolated 16-point digital
input module, 90–140 VAC/VDC
SNAP-IAC-A-16 SNAP isolated 16-point digital
input module, 180–280 VAC/VDC
SNAP-IAC-K-16 SNAP isolated 16-point digital
input module, 70–130 VAC/VDC
SNAP-ODC-32-SRC
SNAP-ODC-32-SRC-FM*
SNAP 32-point digital output mod-
ule, 5–60 VDC load sourcing
SNAP-ODC-32-SNK
SNAP-ODC-32-SNK-FM*
SNAP 32-point digital output mod-
ule, 5–60 VDC load sinking
Accessories
OPTOTERMINAL-G20
Terminal with operator controls for
use with SNAP high-density digital
modules
* Factory Mutual approved
SNAP-IDC-32 high-density digital input module
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
2
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
•SNAP-IAC-16, SNAP-IAC-A-16, and SNAP-IAC-K-16
digital input modules each have 16 points with channel-
to-channel isolation. These modules sense on/off status
for 90–140 VAC (SNAP-IAC-16), 180–280 VAC (SNAP-IAC-
A-16), or 70–130 VAC (SNAP-IAC-K-16).
• SNAP-ODC-32-SRC, SNAP-ODC-32-SRC-FM, SNAP-
ODC-32-SNK, and SNAP-ODC-32-SNK-FM digital
output modules have 32 points and can switch on and
off 5–60 VDC loads, either sourcing or sinking.
Part numbers ending in -FM are Factory Mutual approved.
All HDD input modules feature automatic counting and
latching. DC models are ideal for detecting low-voltage
auxiliary contacts.
Mounting Racks
SNAP high-density digital modules are designed to work with
SNAP PAC mounting racks. Up to 16 modules can be mounted
on a rack, making up to 512 digital points available. In
addition, HDD modules can be mixed with 4-channel SNAP
digital, analog, and serial modules on the same rack.
SNAP racks have a retention rail locking system. Use two 4-40
by ½-inch standard machine screws to hold each module
securely in position on the SNAP rack.
Wiring Aids: Breakout Boards, Wiring
Harnesses, and Header Cables
Due to space constraints, instead of using the usual removable
terminal connectors, high-density digital modules use other
wiring devices. These cables and breakout boards are available
separately and are detailed in form 1756, SNAP TEX Cables and
Breakout Boards Data Sheet, available on our website.
SNAP breakout boards for high-density digital modules
provide LED indicators as well as labeled and easily accessible
fused connectors for input or output points, all of which
simplify connecting field devices to HDD modules.
For a table showing compatible boards, cables, and modules,
see the SNAP TEX Cables and Breakout Boards Data Sheet.
If you are not using breakout boards, you can connect 16-
point input modules directly to field devices or terminal strips
using the SNAP-HD-ACF6 wiring harness assembly. The
assembly has two 8-point connectors that plug securely into
the top of the module and provide flying leads at the field end.
Similarly, 32-point modules can connect to field devices with
the SNAP-HD-CBF6 wiring harness, which plugs into the top
of the module and provides flying leads.
SNAP Product Compatibility
SNAP HDD modules are part of the SNAP PAC System and can
be used on SNAP PAC mounting racks with SNAP PAC R-series
controllers and SNAP PAC EB and SB brains. These modules
can be used with both standard wired Ethernet controllers
and brains and with Wired+Wireless™ models.
Other digital, analog, and serial SNAP I/O modules can be
placed on the same rack with HDD modules for the mix of
signals required at any location.
NOTE: To use HDD modules in older systems, see form 1688,
SNAP PAC System Migration Technical Note.
Programming
Opto 22 PAC Control software version 8.0 or newer is required
for SNAP high-density digital modules used with a SNAP PAC
controller. SNAP HDD modules can also be accessed by an
EtherNet/IP or Modbus/TCP system or by custom software
built with the OptoMMP Communication Toolkit.
See form 1547, SNAP High-Density Digital Modules User’s Guide,
for detailed information on using these modules in a PAC
Control strategy. The OptoMMP Communication Toolkit is
documented in form 1465, OptoMMP Protocol Guide.
Communication with A-B PLC systems is covered in form 1770,
EtherNet/IP for SNAP PAC Protocol Guide. For Modbus/TCP
systems, see form 1678, Modbus/TCP Protocol Guide.
OptoTerminal-G20
SNAP high-density digital
modules have a
diagnostic port for
commissioning and
troubleshooting using
the optional
OptoTerminal-G20
operator interface
terminal.
The OptoTerminal-G20 displays the status of a high-density
digital module’s points on a two-line LCD display and can also
be used to turn output points on and off. See form 1547, SNAP
SNAP-IDC-HDB breakout board
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
3
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
High-Density Digital Modules User’s Guide, for more
information.
Connecting to G4 Digital I/O
Some 32-channel HDD modules can connect to older G4 and
G1 mounting racks, using a special cable, to integrate older G4
digital I/O systems with modern PAC Project software and
SNAP Ethernet-based controllers. For outputs, this connection
makes available the G4 module’s 3-amp switching capability,
which provides twelve times the 0.25 amp capability per point
of the high-density digital modules themselves.
These HDD modules and cables also work with some G1 racks,
and the SNAP-HD-G4F6 works with some integrated I/O racks.
For more information, see form 1756, SNAP TEX Cables and
Breakout Boards Data Sheet.
Outputs
Connect SNAP-ODC-32-SNK digital output modules to
G4PB16H and G4PB16HC mounting racks using the SNAP-
HD-G4F6 header cable.
•Do not use SNAP-ODC-32-SRC modules with G4 digital.
•All G4 modules on the G4 mounting rack must be
outputs and must be the same logic voltage (5, 15, or 24
VDC).
Inputs
SNAP-IDC-32N and SNAP-IDC-32DN digital input modules can
connect to G4PB16H and G4PB16HC mounting racks using
the SNAP-HD-G4F6N header cable.
•All G4 modules on the G4 mounting rack must be inputs
and must be the same logic voltage (5, 15, or 24 VDC).
•For 5 volt G4 modules, use the SNAP-IDC-32DN.
•For 15 or 24 volt G4 modules, use the SNAP-IDC-32N.
NOTE: While not designed for this use, it is possible to connect the
SNAP-IDC-32 module with G4 15 or 24 V inputs using a SNAP-HD-
G4F6 cable. However, the SNAP-IDC-32 uses positive-true logic
and therefore returns the inverse of the typical negative-true logic.
For example, if the SNAP-IDC-32 is controlled by a PAC Control
strategy, an “OFF” state from it actually indicates that the
associated G4 module is turned ON.
Comparing SNAP Digital Modules
IMPORTANT: SNAP high-density digital modules differ from
each other and from 4-channel SNAP digital modules in
several critical areas, including electrical capabilities and I/O
performance.
You must consider these differences when deciding which
SNAP digital module to use for an application. For example,
while a SNAP-IDC-32 digital input module provides 32 I/O
points on one module, it does not provide the channel-to-
channel isolation of a SNAP-IDC-16 with 16 channels or a
SNAP-IDC5 with 4. See the table “Comparing SNAP High-
Density and 4-Channel Digital Modules” on page 4 for a
comparison of capabilities.
Counting
Digital counting is an important area in which HDD input
modules differ from 4-channel SNAP digital input modules.
Opto 22 has traditionally provided counting capability for any
digital input point when used with a brain that supports high-
speed digital features. This counting happens in the brain, not
in the module.
SNAP high-density digital modules introduce a different kind
of counting, where the counting occurs on the module itself.
While the module uses a 16-bit counter (counting only to
65,535), the I/O processor used with the module accumulates
counts to 32 bits by periodically getting and clearing the
module’s counts, and adding each new count to what it
already has for that point. However, this is not high-speed
counting because it is done on the module, and both the HDD
module’s speed and communication speed between the brain
and the module are limited. Note that counting speed on HDD
modules is not deterministic and will vary.
However, this slower counting rate works well for many
applications that involve counting at slower speeds—for
example, rotating shafts, flow meters with pulsed outputs, and
electrical meters tuned to slower speeds.
SNAP-HD-G4F6 header cable
G4PB16H mounting racks
SNAP-ODC-32-SNK
module
SNAP mounting rack
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
4
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Comparing SNAP High-Density and 4-Channel Digital Modules
Item SNAP High-Density Digital Modules 4-Channel SNAP Digital Modules
Number of points
on module 16 or 32, depending on module 4
Isolation and fusing
16-point input modules: Each point is optically iso-
lated from other points on the module.
32-point input and output modules: The module is
divided into four groups of eight points. Groups are
isolated from each other, but points within a group
are not isolated from each other. Groups must be
externally fused.
Input modules: Each point is optically isolated
from other points on the module.
Most output modules: Points are not isolated
from each other. Points share a common fuse. For
isolated modules, see form 1144, SNAP
Digital Output Modules Data Sheet.
Status LEDs
None; use the handheld OptoTerminal-G20 for mod-
ule diagnostics and commissioning, or for 32-point
modules, connect to an optional breakout rack.
One for each point, located on top of module.
Polling time from I/
O processor to
module1
2–30 ms typical20.5–2 ms typical2
Module turn-on/off
time1
16-point input modules: 15–20 ms
32-point input modules: 6 ms
Output modules: 100 microseconds
Varies by module. Examples:
•SNAP-IDC5-FAST: 25 microseconds
•SNAP-IDC5: 5 ms turn-on, 15 ms turn-off
On/off status Yes Yes
Input latching Yes Yes
Counting on digital
input modules
Counting occurs on the module.3
Counting is available with SNAP-PAC-R14, SNAP-
PAC-EB14, and SNAP-PAC-SB1 processors.
Counting speeds:
On 32-point modules, 0–50 Hz @ 50% duty cycle
On 16-point modules, 0–25 Hz @ 50% duty cycle
(Speed depends on module; see specifications for
each part number.)
High-speed counting occurs on the I/O processor
(brain or on-the-rack controller) and can be config-
ured for any point. (High-speed counting is avail-
able on SNAP-PAC-R14, SNAP-PAC-EB14, and
SNAP-PAC-SB1 processors.)
Counting speed varies based on the processor
and the speed of the module. Example: SNAP-
PAC-EB1 brain with SNAP-IDC5-FAST: up to 20
KHz
Watchdog timer Firmware 8.1 and higher, yes.
Firmware 8.0 and lower, no. Yes
Pulse generation Yes Yes
On-pulse, off-pulse,
and Period mea-
surement
No Yes
Frequency No Yes
To t a l i ze r N o Ye s
Digital events Firmware 8.1 and higher, yes.
Firmware 8.0 and lower, no. Yes
1 Actual turn-on and turn-off times equal the polling time plus the module time.
2 Polling time varies based on the SNAP I/O processor (brain or on-the-rack controller), processor configuration, and Ethernet
host communication activity.
3 The high-density digital module uses a 16-bit counter, but the processor used with the module accumulates counts to 32 bits
by periodically getting and clearing the module’s counts and adding to current values. Update time varies based on number of
modules and Ethernet communication demands.
4 Including -FM (Factory Mutual approved) and -W (Wired+Wireless) models, and the SNAP-PAC-R1-B.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
5
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Specifications
SNAP-IDC-32
SNAP-IDC-32-FM
SNAP-IDC-32N SNAP-IDC-32D SNAP-IDC-32DN
Input Range 10 to 32 VDC -10 to -32 VDC 2.5 to 12 VDC -2.5 to -12 VDC
Nominal Voltage Range 24 VDC -12 to -24 VDC 2.5 VDC -2.5 VDC
Input Resistance 20 K ohms 20 K ohms 3 K ohms 3 K ohms
Logic Voltage and Current 5 VDC ± 0.1 @ 150 mA 5 VDC ± 0.1 @ 150 mA
Maximum Operating
Common Mode Voltage 250 V 250 V 250 V 250 V
Isolation: Field to Logic 1500 V 1500 V 1500 V 1500 V
Input Arrangement 32 input channels; 4 groups of 8 inputs each 32 input channels; 4 groups of 8 inputs each
Common connection
Points in each group
share a common
negative connection.
Points in each group
share a common
positive connection.
Points in each group
share a common
negative connection.
Points in each group
share a common
positive connection.
Channel-to-Channel Isola-
tion
No channel-to-channel isolation;
100 V group-to-group isolation
No channel-to-channel isolation;
100 V group-to-group isolation
Hold-down screws
Connector screws
Torque: 4 in-lb (0.45 N-m)
Torque: 5.26 in-lb (0.6 N-m)
Torque: 4 in-lb (0.45 N-m)
Torque: 5.26 in-lb (0.6 N-m)
Maximum Number of HDD
Modules on One Mounting
Rack
16 16 16 16
Indicators None; use optional OptoTerminal-G20 diagnostic display or breakout rack.
ON Voltage 10 VDC @ 0.5 mA -10 VDC @ 0.5 mA 2.5 VDC @ 0.5 mA -2.5 VDC @ 0.5mA
OFF Voltage 3VDC @ 0.1mA -3VDC @ 0.1mA 1VDC @ 0.1mA -1VDC @ 0.1mA
Polling time from I/O pro-
cessor to module1 2–30 ms typical2 2–30 ms typical2 2–30 ms typical2 2–30 ms typical2
Input Turn-On/Off Time 6 ms 6 ms 6 ms 6 ms
Counting Frequency
(DC input)
0–50 Hz @ 50% duty
cycle
0–50 Hz @ 50% duty
cycle
0–50 Hz @ 50% duty
cycle
0–50 Hz @ 50% duty
cycle
Operating Temperature -20 to 70 °C -20 to 70 °C -20 to 70 °C -20 to 70 °C
Storage Temperature -40 to 85 °C -40 to 85 °C -40 to 85 °C -40 to 85 °C
Agency Approvals UL, CE, RoHS, DFARS
FM (-FM model only) CE, RoHS, DFARS CE, RoHS, DFARS CE, RoHS, DFARS
Warranty Lifetime Lifetime Lifetime Lifetime
1 Affects turn-on and turn-off determination
2 Time varies based on the SNAP PAC I/O processor (brain or on-the-rack controller), processor configuration, and Ethernet host
communication activity.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
6
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Specifications (continued)
SNAP-IDC-16 SNAP-IDC-HT-16 SNAP-IAC-16 SNAP-IAC-A-16 SNAP-IAC-K-16
Input Range 10–32 VDC/VAC 15–28 VDC/VAC 90–140 VAC/VDC 180–280 VAC/VDC 70–130 VAC/VDC
Nominal Voltage Range 24 VDC 24 VDC 120 VAC 240 VAC 100 VAC
Input Resistance 44 K ohms 4 K ohms 300 K ohms 940 K ohms 220 K ohms
Logic Voltage and
Current
5 VDC ± 0.1 @
150 mA
5 VDC ± 0.1 @
150 mA
5 VDC ± 0.1 @
150 mA
5 VDC ± 0.1 @
150 mA
5 VDC ± 0.1 @
150 mA
Input Arrangement 16 isolated input channels 16 isolated input channels
Channel-to-Channel Iso-
lation
250 V steady-state,
1500 V transient
250 V steady-state,
1500 V transient
Maximum Operating
Common Mode Voltage 250 V 250 V 250 V 250 V 250 V
Isolation: Field to Logic 1500 V 1500 V 1500 V 1500 V 1500 V
Maximum Number of
HDD Modules on One
Mounting Rack
16 16 16 16 16
Indicators None; use optional OptoTerminal-G20
diagnostic display. None; use optional OptoTerminal-G20 diagnostic display.
ON Voltage 10 VDC @
0.230 mA
15 VDC @
3.50 mA
90 VAC/VDC @
0.3 mA
180 VAC/VDC @
0.191 mA
70 VAC/VDC @
0.3 mA
OFF Voltage 3 VDC @ 0.05 mA 9 VDC @ 2.0 mA 40 VAC/VDC @
0.135 mA
40 VAC/VDC @
0.043 mA
30 VAC/VDC @
0.135 mA
Torque, hold-down
screws 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m)
Torque, connector
screws 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m)
Polling time from I/O
processor to module1 2–30 ms typical2 2–30 ms typical2 2–30 ms typical2 2–30 ms typical2 2–30 ms typical2
Input Turn-On/Off Time 15 ms turn-on time
20 ms turn-off time
20 ms turn-on time
25 ms turn-off time
15 ms turn-on time
20 ms turn-off time
15 ms turn-on time
20 ms turn-off time
15 ms turn-on time
20 ms turn-off time
Counting Frequency
(DC input)
0–25 Hz @ 50%
duty cycle
0–15 Hz @ 50%
duty cycle
0–25 Hz @ 50%
duty cycle
0–25 Hz @ 50%
duty cycle
0–25 Hz @ 50%
duty cycle
Operating Temperature -20 to 70 °C -20 to 70 °C -20 to 70 °C -20 to 70 °C -20 to 70 °C
Storage Temperature -40 to 85 °C -40 to 85 °C -40 to 85 °C -40 to 85 °C -40 to 85 °C
Agency Approvals UL, CE, RoHS,
DFARS CE, RoHS, DFARS UL, CE, RoHS,
DFARS
UL, CE, RoHS,
DFARS CE, RoHS, DFARS
Warranty Lifetime Lifetime Lifetime Lifetime Lifetime
1 Affects turn-on and turn-off determination
2 Time varies based on the SNAP PAC I/O processor (brain or on-the-rack controller), processor configuration, and Ethernet host
communication activity.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
7
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Specifications (continued)
SNAP-ODC-32-SRC
SNAP-ODC-32-SRC-FM
SNAP-ODC-32-SNK
SNAP-ODC-32-SNK-FM
Switching Voltage 5–60 VDC 5–60 VDC
Nominal Switching Voltage 12–24 VDC 12–24 VDC
Logic Voltage and Current 5 VDC ± 0.1 @ 150 mA 5 VDC ± 0.1 @ 150 mA
Maximum Off State Voltage 60 VDC 60 VDC
Output Leakage, Typical <10 microamps per channel (60 V, 70 °C) <10 microamps per channel (60 V, 70 °C)
Maximum Load per Point 0.25 A 0.25 A
Voltage Drop 0.15 VDC @ 0.25 A 0.15 VDC @ 0.25 A
Surge (1 sec.) 1 A 1 A
Output Arrangement
32 output channels; 4 groups of 8 outputs
each. Points in each group share a common
positive connection.
32 output channels; 4 groups of 8 outputs each.
Points in each group share a common
negative connection.
Maximum Operating
Common Mode Voltage 250 V 250 V
Isolation: Field to Logic 1500 V 1500 V
Output Turn-On/Off Time 100 microseconds 100 microseconds
Polling time from I/O processor
to module12–30 ms typical22–30 ms typical2
Indicators None; use optional OptoTerminal-G20 diag-
nostic display or breakout rack.
None; use optional OptoTerminal-G20 diagnostic
display or breakout rack.
Maximum Number of HDD
Modules on One Mounting
Rack
16 16
Torque, hold-down screws 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m)
Torque, connector screws 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m)
Operating Temperature -20 to 70 °C -20 to 70 °C
Storage Temperature -40 to 85 °C -40 to 85 °C
Agency Approvals
SNAP-ODC-32-SRC: UL, CE, RoHS, DFARS
SNAP-ODC-32-SRC-FM: CE, FM, RoHS,
DFARS
SNAP-ODC-32-SNK: UL, CE, RoHS, DFARS
SNAP-ODC-32-SNK-FM: CE, FM, RoHS, DFARS
Warranty Lifetime Lifetime
1 Affects turn-on and turn-off determination
2 Time varies based on the SNAP PAC I/O processor (brain or on-the-rack controller), processor configuration, and Ethernet host
communication activity.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
8
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Pinouts and Wiring
Pinouts—SNAP-ODC-32-SRC (and -FM) and SNAP-ODC-32-SNK (and -FM) Digital Modules
B0
B4
B1
B5
B2
B6
B3
B7
BCOM
12–24 VDC Nominal
C0
C4
C1
C5
C2
C6
C3
C7
CCOM
12–24 VDC Nominal
D0
D4
D1
D5
D2
D6
D3
D7
DCOM
12–24 VDC Nominal
+
12–24 VDC Nominal
+
+
+
B0
B4
B1
B5
B2
B6
B3
B7
BCOM
12–24 VDC Nominal
C0
C4
C1
C5
C2
C6
C3
C7
CCOM
12–24 VDC Nominal
D0
D4
D1
D5
D2
D6
D3
D7
DCOM
12–24 VDC Nominal
A0
A4
A1
A5
A2
A6
A3
A7
ACOM
+
12–24 VDC Nominal
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
SNAP-ODC-32-SRC
Load Sourcing Module
(Top view of module)
SNAP-ODC-32-SNK
Load Sinking Module
(Top view of module)
+
+
+
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO
LO LO
LO LO
LO LO
LO
LO LO
LO LO
LO LO
LO
FUSING
For both sourcing and sinking
modules, either fuse each point
(as shown in the first and third
groups, below) or fuse each
group of points (as shown in
the second and fourth groups).
A0
A4
A1
A5
A2
A6
A3
A7
ACOM
NOTE: The SNAP-ODC-32-SRC and SNAP-ODC-32-SNK modules (includes -FM models) have built-in
transient suppression for each channel. Additional commutating diodes are not necessary.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
9
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Pinouts and Wiring (continued)
Pinouts for SNAP-IDC-32, SNAP-IDC-32-FM, and SNAP-IDC-32N Digital Modules
IMPORTANT: All SNAP-IDC-32 modules are
polarity specific and must be wired as shown.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
10
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Pinouts and Wiring (continued)
Pinouts for SNAP-IDC-32D and SNAP-IDC-32DN Digital Modules
IMPORTANT: All SNAP-IDC-32 modules are
polarity specific and must be wired as shown.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
11
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Pinouts and Wiring (continued)
Connector Wiring—SNAP 32-Point Digital Modules
The following diagram shows 32-channel module connector
wiring for the SNAP-HD-CBF6 wiring harness.
Wires from the wiring harness are grouped into four sets.
Each set contains color-coded wires.
Signal
Pin
Number
Harness
Wire Color
A4 39 White
A5 37 Violet
A6 35 Green
A7 33 Orange
ACOM 31 Brown
B4 29 White
B5 27 Violet
B6 25 Green
B7 23 Orange
BCOM 21 Brown
C4 19 White
C5 17 Violet
C6 15 Green
C7 13 Orange
CCOM 11 Brown
D4 9 White
D5 7 Violet
D6 5 Green
D7 3 Orange
DCOM 1 Brown
Harness
Wire Color
Pin
Number Signal
Gray 40 A0
Blue 38 A1
Yellow 36 A2
Red 34 A3
Black 32 ACOM
Gray 30 B0
Blue 28 B1
Yellow 26 B2
Red 24 B3
Black 22 BCOM
Gray 20 C0
Blue 18 C1
Yellow 16 C2
Red 14 C3
Black 12 CCOM
Gray 10 D0
Blue 8 D1
Yellow 6 D2
Red 4 D3
Black 2 DCOM
Connector wiring for SNAP-ODC-32-SNK, SNAP-ODC-32-SRC, SNAP-IDC-32,
-FM versions, SNAP-IDC-32N, and SNAP-IDC-32DN (top view of module)
Building Your Own Wiring Harness or Header Cable for a 32-channel module
To build your own wiring harness similar to the SNAP-HD-
CBF6, you will need the following parts:
Connector: Molex 15-04-5401
Pin housing: Molex 50-57-9320
Pins: Molex p/n 16-02-0103
Cable: Alpha 5020/40c (24 AWG, 40 conductor) or equivalent
(UL type CM)
To build your own SNAP-HD-BF6 header cable for use with
either breakout rack, you will need the parts listed below.
Both ends of the cable use the same connectors.
Connector: Molex 15-04-5401
Pin housing: Molex 50-57-9320
Pins: Molex p/n 16-02-0103
Cable: Alpha 5020C or Manhattan M38910 (24 AWG, 10
conductor, 4x length needed) or equivalent (UL type CM)
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
12
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Pinouts and Wiring (continued)
Pinouts—16-Channel Digital Input Modules
Applies to the SNAP-IDC-16, SNAP-IDC-HT-16, SNAP-IAC-16, SNAP-IAC-A-16, and SNAP-IAC-K-16.
NOTE: The connectors on these modules
are not polarity-sensitive. You can connect
the positive lead (+) for each channel (or
point) to either L1 or L2, and this can vary
from point to point on the module.
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
13
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Pinouts and Wiring (continued)
Connector Wiring—SNAP 16-Point Digital Modules
The following diagram shows16-channel module connector
wiring for the SNAP-HD-ACF6 wiring harness. Applies to
SNAP-IDC-16, SNAP-IDC-HT-16, SNAP-IAC-16, SNAP-IAC-A-16,
and SNAP-IAC-K-16 high-density digital modules.
NOTE: The small four-pin connector on the top of a 16-point
module connects to the optional OptoTerminal-G20 using a
special adapter cable, included with the OptoTerminal.
Port for OptoTerminal-G20
Building Your Own Wiring Harness for a
16-channel Module
To build your own wiring harness similar to the SNAP-HD-
ACF6, you will need the following parts:
Connector: Molex 39-01-2165
Pins: Molex 39-00-0214
Cable: Belden 8308 (22 AWG, 16 conductor, shielded) or
equivalent (UL AWM style 2464)
Top View of Module
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
14
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Dimensional Drawings
SNAP 32-Point Digital Modules
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
15
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Dimensional Drawings (continued)
SNAP 16-Point Digital Modules
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules
PAGE
16
DATA SHEET
Form 1556-160920
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Dimensional Drawings (continued)
SNAP High-Density Digital Modules (All)
SNAP High-Density Digital I/O Modules
SNAP High-Density Digital I/O Modules DATA SHEET
Form 1556-160920
PAGE
17
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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
© 2006–2016 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.
Dimensional Drawings (continued)
SNAP High-Density Digital Modules (All)
More About Opto 22
www.opto22.com • Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • Form 1335-160810
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
© 2013–2016 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, easy-to-use, open
standards-based hardware and software products deployed
worldwide.
Industrial automation, process control, building automation,
industrial refrigeration, remote monitoring, data acquisition,
Industrial Internet of Things (IIoT), and information technology
applications all rely on Opto 22.
groov
Monitor and control your
equipment from anywhere
using your smartphone or
tablet with groov. Build your
own mobile app easily—just
drag, drop, and tag. No
programming or coding. Visit
groov.com
for more
information and your free trial.
SNAP PAC System
Developer- and IIoT-ready, the SNAP PAC System connects
physical assets to databases and applications using open
standards. 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
SNAP PAC programmable
automation controllers handle a
wide range of digital, analog, and
serial functions for data collection,
remote monitoring, process control,
and discrete and hybrid manufacturing.
For IIoT applications and easier integration with company
systems, standalone and rack-mounted SNAP PACs include a
built-in HTTP/HTTPS server and
RESTful API
(application
program interface). The REST API gives you secure, direct access
to I/O and variable data using your choice of programming
languages. No middleware, protocol converters, drivers, or
gateways needed.
Based on open Ethernet and Internet Protocol (IP) standards,
SNAP PACs make it easier to build or extend a system without the
expense and limitations of proprietary networks and protocols.
PAC Project Software Suite
Opto 22’s PAC Project Software Suite offers full-featured, cost-
effective control programming, HMI (human machine interface),
OPC server, and database connectivity software.
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 one SoftPAC
software-based controller, 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, local
PID loop control, watchdog, totalizing, and much more.
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.
Analog, digital, and serial modules are mixed on one mounting
rack and controlled by a SNAP PAC brain or rack-mounted PAC.
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 test each product twice before it leaves
our factory, rather than only testing a sample of each
batch, 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 from engineers with 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 (toll-free in the U.S. and Canada) or 951-695-3000,
or visit our website at
www.opto22.com
.
www.opto22.com