OPTO 22 SNAP-PAC-RCK8-FM, SNAP-PAC-RCK12-FM, SNAP-PAC-RCK4, SNAP-PAC-RCK12, SNAP-PAC-R1 User Manual

SNAP PAC Racks

SNAP-PAC-RCK8 (8-Module Position I/O Mounting Rack)

Shown with SNAP-PAC-R1 controller and SNAP modules (all
purchased separately)

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

Description

SNAP PAC I/O mounting racks are designed to hold an
intelligent SNAP I/O processor—a SNAP PAC EB-series or SB­series 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.

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

SNAP-PAC-RCK12

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.

Part Numbers

Part Description

SNAP-PAC-RCK4 4-module SNAP PAC rack

SNAP-PAC-RCK4-FM

SNAP-PAC-RCK8 8-module SNAP PAC rack

SNAP-PAC-RCK8-FM

SNAP-PAC-RCK12 12-module SNAP PAC rack

SNAP-PAC-RCK12-FM

SNAP-PAC-RCK16 16-module SNAP PAC rack

SNAP-PAC-RCK16-FM

SNAP-FUSE7.5AB 7.5-amp fuse, 25 pack

SNAP-TEX-DRC10

SNAP-TEX-REC10W

SNAP-TEX-REC10N

4-module SNAP PAC rack, Factory
Mutual approved

8-module SNAP PAC rack, Factory
Mutual approved

12-module SNAP PAC rack, Factory
Mutual approved

16-module SNAP PAC rack, Factory
Mutual approved

SNAP rack DIN-rail adapter clip, 10­pack

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 Racks

DATA SHEET

Form 1684-160506

© 2007–2016 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 comp anies or organizations.

SALES 800-321-6786 • 951-695-3000 • FAX [phone] • sa [e-mail] • SUPPORT 800-835-6786 • 951-695-3080 • FAX [phone] • [e-mail]

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com

PAG E

1

Specifications

SNAP PAC Racks

Power1 Requirements

2

I/O Processor
Compatibility

Replacement Fuse SNAP-FUSE7.5AB or Littelfuse 297 07.5

Rack Power Terminals
Wire Size

Operating Temperature –20 to 70 °C

Storage Temperature –40 to 85 °C

Relative Humidity 95%, non-condensing

SNAP PAC Racks

Agency Approvals

Warranty 30 months from date of manufacture

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.

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

22 to 14 AWG

Non -FM models: UL, CE, RoHS, DFARS

-FM models: FM, CE, RoHS, DFARS
SNAP-PAC-RCK4-FM and SNAP-PAC-RCK12­FM: ATEX

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

Module Mating Connector Pinout (female)

DATA SHEET

PAG E

2

Power Schematic

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

Form 1684-160506

through its center hold-down screw.

WAR NING: EXPLOSION HAZARD. DO NOT DISCONNECT

WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE NON­HAZARDOUS.

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.

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
SALES 800-321-6786 • 951-695-3000 • FAX [phone] • [e-mail] • SUPPORT 800-835-6786 • 951-695-30 80 • FAX [phone] • supp [e-mail]

© 2007–2016 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 organi zations.

SNAP PAC Racks

See table for overall length

dimensions for specific model

4.45***

(112.01 mm)

SNAP PAC R-series controller or
brain (purchased separately)

SNAP module
(purchased
separately)

Overall Length Dimensions

Part Number Description Width

(inches)

Width

(mm)

Length

(inches)

Length

(mm)

SNAP-PAC-RCK4

SNAP-PAC-RCK4-FM

4-module rack 4.45 112.01 6.25 158.75

SNAP-PAC-RCK8

SNAP-PAC-RCK8-FM

8-module rack 4.45 112.01 9.25 234.95

SNAP-PAC-RCK12

SNAP-PAC-RCK12-FM

12-module rack 4.45 112.01 12.25 311.15

SNAP-PAC-RCK16

SNAP-PAC-RCK16-FM

16-module rack 4.45 112.01 15.25 387.35

Overall Dimensions

Dimensional Drawings

SNAP PAC Racks

© 2007–2016 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 comp anies or organizations.

SALES 800-321-6786 • 951-695-3000 • FAX [phone] • sa [e-mail] • SUPPORT 800-835-6786 • 951-695-3080 • FAX [phone] • [e-mail]

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • w ww.opto22.com

Form 1684-160506

PAG E

3

DATA SHEET

Dimensional Drawings (continued)

Right Side View with DIN-Rail Option Installed

SNAP PAC Racks

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.

DATA SHEET

Form 1684-160506

PAG E

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
SALES 800-321-6786 • 951-695-3000 • FAX [phone] • [e-mail] • SUPPORT 800-835-6786 • 951-695-30 80 • FAX [phone] • supp [e-mail]

4

© 2007–2016 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 organi zations.

SNAP PAC Racks

Typical Plain View of SNAP Mounting Extrusion

Center-to-Center Length (All Models)

Part Number Description Center-to-Center

Length

Number of Center

Positions

SNAP-PAC-RCK4 (or -FM) 4-module rack 4.02 in. 2

SNAP-PAC-RCK8 (or -FM) 8-module rack 3.51 in. 3

SNAP-PAC-RCK12 (or -FM) 12-module rack 5.01 in. 3

SNAP-PAC-RCK16 (or -FM) 16-module rack 4.34 in. 4

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 DIN­rail mounting, see form #1772, the SNAP TEX Mounting/Wiring
and Spare Parts Data Sheet.

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.

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

© 2007–2016 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 comp anies or organizations.

SALES 800-321-6786 • 951-695-3000 • FAX [phone] • sa [e-mail] • SUPPORT 800-835-6786 • 951-695-3080 • FAX [phone] • [e-mail]

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • w ww.opto22.com

Form 1684-160506

PAG E

5

DATA SHEET

Assembling the Circuit Board, Rack Extrusion, and Din Clips

Push down hard on the other edge to snap the
board into place.

Insert one edge of the circuit board into the
extrusion.

1.

3.

Attach one DIN clip to each end cap using the
slots in the end caps as shown.

4.

(This step only for racks with three or more clips.)
Slide one DIN clip to the middle position and
secure with the rivet provided. For racks with four
clips, add an additional middle clip.

2.

Using the screws provided, secure an end cap and
DIN clip assembly to each end of the extrusion.

5.

Removing the Circuit Board from the Rack
Extrusion

If end caps are present, remove them. Then insert a flathead
screwdriver in one of the circuit board release notches and pry
up the board. Repeat in the other release notches until the
board pops out of the extrusion.

Rivet
(included)

2

3

4

1

5

Attaching the Adapter Clip to a DIN Rail

1. Hook the DIN-rail clip over the top of the DIN rail.

2. Using a screwdriver, pry open the DIN-rail clip flange at

the bottom of the clip. Push the clip toward the DIN rail.

3. Snap the DIN-rail clip into place

DIN rail

Extrusion
assembly

SNAP PAC Racks

SNAP PAC Racks

DATA SHEET

Form 1684-160506

PAG E

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
SALES 800-321-6786 • 951-695-3000 • FAX [phone] • [e-mail] • SUPPORT 800-835-6786 • 951-695-30 80 • FAX [phone] • supp [e-mail]

6

© 2007–2016 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 organi zations.