SNAP PAC Racks
Features
Compatible with all SNAP PAC brains and R-series
controllers, including Wired+Wireless
™
models
Secure mounting for SNAP I/O modules plus a SNAP
brain or on-the-rack SNAP PAC controller
Analog, digital, and serial modules on the same rack
Panel or DIN-rail mounting
Modules snap into place
Factory Mutual-approved versions available
SNAP PAC Racks
SNAP PAC Racks
module security, SNAP PAC racks have provisions for two 4-40
by ½-inch standard machine screws to hold each module in
position.
All SNAP PAC racks offer panel mounting and the option of
DIN-rail mounting. DIN-rail adapter part numbers are shown in
the table below. For more information, see form 1772, the
SNAP TEX Mounting/Wiring Tools and Spare Parts Data Sheet.
SNAP PAC racks require a 5 VDC power source. One power
supply can usually power the rack, the I/O processor
(controller or brain), and all modules on the rack. See form
1120, the
SNAP Power Supplies Data Sheet,
to choose a power
supply.
Description
SNAP PAC I/O mounting racks are designed to hold an
intelligent SNAP I/O processor—a SNAP PAC EB-series or SB-
series brain or a SNAP PAC R-series on-the-rack controller—
and several I/O modules. Both standard wired controllers and
brains and Wired+Wireless models are mounted on these
racks.
Since SNAP analog, digital, and serial I/O modules all have the
same footprint, customers using SNAP PAC racks can mix all
these modules on the same I/O mounting rack. Field devices
are wired directly to the top-mounted connectors on the
modules plugged into each rack, or through breakout boards
when additional wiring space is required. (See form 1756, the
SNAP TEX Cables and Breakout Boards Data Sheet,
for more
information.)
SNAP PAC racks can accommodate up to 4, 8, 12, or 16 I/O
modules. Part numbers ending in -FM are Factory Mutual
approved.
The module and rack design allows modules to simply “snap”
on the mounting rack.
Part Numbers
Part
SNAP-PAC-RCK4
SNAP-PAC-RCK4-FM
SNAP-PAC-RCK8
SNAP-PAC-RCK8-FM
SNAP-PAC-RCK12
SNAP-PAC-RCK12-FM
SNAP-PAC-RCK16
SNAP-PAC-RCK16-FM
SNAP-FUSE7.5AB
Description
4-module SNAP PAC rack
4-module SNAP PAC rack, Factory
Mutual approved
8-module SNAP PAC rack
8-module SNAP PAC rack, Factory
Mutual approved
12-module SNAP PAC rack
12-module SNAP PAC rack, Factory
Mutual approved
16-module SNAP PAC rack
16-module SNAP PAC rack, Factory
Mutual approved
7.5-amp fuse, 25 pack
DATA SHEET
Form 1684-141031
SNAP rack DIN-rail adapter clip, 10-
pack
Wide end cap for SNAP PAC racks
DIN-rail assemblies, 10-pack
Narrow end cap for SNAP PAC racks
DIN-rail assemblies, 10-pack
SNAP-PAC-RCK8 (8-Module Position I/O Mounting Rack)
Shown with SNAP-PAC-R1 controller and SNAP modules (all
purchased separately)
SNAP-TEX-DRC10
SNAP-TEX-REC10W
SNAP-TEX-REC10N
SNAP PAC 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
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
© 2007–2014 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.
PAGE
1
SNAP PAC Racks
Specifications
Power
1
Requirements
5.0 to 5.2 VDC @ 4.2 Amps max
SNAP-PAC-R1
SNAP-PAC-R2
SNAP-PAC-EB1
SNAP-PAC-EB2
SNAP-PAC-SB1
SNAP-PAC-SB2
SNAP-PAC-R1-W
SNAP-PAC-R2-W
SNAP-PAC-EB1-W
SNAP-PAC-EB2-W
SNAP-PAC-R1-FM
SNAP-PAC-R2-FM
SNAP-PAC-EB1-FM
SNAP-PAC-EB2-FM
I/O Processor
2
Compatibility
SNAP PAC Racks
Replacement Fuse
Rack Power Terminals
Wire Size
Operating Temperature
Storage Temperature
Relative Humidity
Agency Approvals
Warranty
SNAP-FUSE7.5AB or Littelfuse 297 07.5
22 to 14 AWG
–20 to 70 °C
–40 to 85 °C
95%, non-condensing
Non -FM models: UL, CE, RoHS, DFARS
-FM models: FM, CE, RoHS, DFARS
30 months from date of manufacture
Module Mating Connector Pinout (female)
1 Power requirements shown are for a rack, a processor, and a full load of
analog modules. Power requirements for SNAP serial and high-density
modules are higher. See module data sheets.
2 “I/O Processor” means a SNAP PAC brain or SNAP PAC on-the-rack
controller. For compatibility with legacy Opto 22 products, see form #1693,
Legacy and Current Product Comparison and Compatibility Charts.
Power Schematic
Form 1684-141031
Notes on Grounding
Pin 18 E GND on each module (see diagram above right) is connected
to the rack’s GND. Module hold-down screws are also connected to
the rack’s GND.
The brain or rack-mounted controller is connected to the rack’s GND
through its center hold-down screw.
DATA SHEET
WARNING:
EXPLOSION HAZARD. DO NOT DISCONNECT
WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE NON-
HAZARDOUS.
AVERTISSEMENT:
RISQUE D'EXPLOSION. NE PAS
DÉBRANCHER TANT QUE LE CIRCUIT EST SOUS TENSION, À
MOINS QU'IL NE S'AGISSE D'UN EMPLACEMENT NON
DANGEREUX.
PAGE
2
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
© 2007–2014 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 PAC Racks
Dimensional Drawings
Overall Dimensions
SNAP PAC R-series controller or
brain (purchased separately)
SNAP module
(purchased
separately)
SNAP PAC Racks
4.45***
(112.01 mm)
See table for overall length
dimensions for specific model
Overall Length Dimensions
Part Number
SNAP-PAC-RCK4
SNAP-PAC-RCK4-FM
SNAP-PAC-RCK8
SNAP-PAC-RCK8-FM
SNAP-PAC-RCK12
SNAP-PAC-RCK12-FM
SNAP-PAC-RCK16
SNAP-PAC-RCK16-FM
Description
Width
(inches)
4.45
4.45
4.45
4.45
Width
(mm)
112.01
112.01
112.01
112.01
Length
(inches)
6.25
9.25
12.25
15.25
Length
(mm)
158.75
234.95
311.15
387.35
4-module rack
8-module rack
12-module rack
16-module rack
DATA SHEET
Form 1684-141031
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
© 2007–2014 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.
PAGE
3
SNAP PAC Racks
Dimensional Drawings (continued)
Right Side View with DIN-Rail Option Installed
SNAP PAC Racks
(See form 1772)
For more information on DIN-rail mounting kits, see form 1772,
the
SNAP TEX Mounting/Wiring Tools and Spare Parts Data Sheet.
Form 1684-141031
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
© 2007–2014 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.
PAGE
4
DATA SHEET
SNAP PAC Racks
Mounting the Extrusion onto a Panel
NOTE: If you are not using hold-down screws, the SNAP PAC
rack assembly should be mounted horizontally.
Use the following steps to mount a rack onto a panel. For DIN-
rail mounting, see form #1772, the
SNAP TEX Mounting/Wiring
and Spare Parts Data Sheet.
Alternate Method: Prefabrication of Panels
(No product on site)
Mounting holes are in sets of two, located on lower left and
upper right with respect to a center line (CL).
1.
Using the diagram below, determine CL1 mounting hole
positions. (CL1 is located on the left side of all SNAP PAC
rack mounting extrusions.)
2.
Use the center-to-center length specification table
below to determine the offset between center lines and
the number of center line positions for each model.
3.
Repeat the process for each center line position.
SNAP PAC Racks
Preferred Method: Template
(Product on site)
1.
Use SNAP PAC rack mounting extrusion as template.
2.
Use the diagram below to determine required product
and option clearances.
Typical Plain View of SNAP Mounting Extrusion
Center-to-Center Length (All Models)
Part Number
SNAP-PAC-RCK4 (or -FM)
SNAP-PAC-RCK8 (or -FM)
SNAP-PAC-RCK12 (or -FM)
SNAP-PAC-RCK16 (or -FM)
Description
4-module rack
8-module rack
12-module rack
16-module rack
Center-to-Center
Length
4.02 in.
3.51 in.
5.01 in.
4.34 in.
Number of Center
Positions
DATA SHEET
Form 1684-141031
2
3
3
4
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
© 2007–2014 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.
PAGE
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