Opto 22 SNAP B-Series Rack Data Sheet

SNAP B-SERIES RACKS

Features

Secure mounting for SNAP I/O modules plus a SNAP brain or

>

on-the-rack SNAP controller

Analog, digital, and serial modules on the same rack

>

Panel or DIN-rail mounting

>

Modules snap into place

>

DESCRIPTION

NOTE: For racks to use with SNAP PAC controllers and brains, see
Opto 22 form #1684, the SNAP PAC Racks Data Sheet.

NOTE: M-series racks (such as the SNAP-M64), used with SNAP Simple
brains and SNAP-UP1-M64 controllers, have been replaced by SNAP
PAC racks. See form #1684.

DATA SHEET

Form 0784-190731

PAGE 1

SNAP B-Series Rack

All SNAP racks offer panel mounting and the option of DIN-rail
mounting. SNAP racks require a 5 VDC power source. SNAP-B4M,
SNAP-B8M, SNAP-B12M, SNAP-B16M, and SNAP-D64RS racks are
Factory Mutual approved.

SNAP B-series mounting racks are designed to hold an intelligent
SNAP I/O processor—either a SNAP brain or an on-the-rack
controller—and several I/O modules.

This rack family includes racks that are compatible with ARCNET and
serial SNAP brains, including those using Modbus® and Profibus®
protocols, and with some Ethernet-based SNAP Ultimate I/O™
on-the-rack controllers and SNAP Ethernet I/O™ brains. For specific
processor compatibility, see “Specifications” on page 3.

Since SNAP analog, digital, and serial I/O modules have the same
footprint, customers using most SNAP B-series racks can mix modules
on the same I/O mounting rack. However, module types, features, and
positions on the rack vary depending on the capabilities of the brain
or on-the-rack controller used. See the brain or controller data sheet
for details.

Field devices are wired directly to the top-mounted removable
connectors on the modules plugged into each rack. SNAP B-series
racks can accommodate up to 4, 8, 12, or 16 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 module security,
SNAP racks have provisions for two 4-40 by ½-inch standard machine
screws to hold each module in position.

MC and MC-P model racks provide an auxiliary screw-type terminal
strip for field wiring common connections such as loop power
distribution. MC racks use a fixed terminal strip, while MC-P racks use
removable connectors for easy maintenance (see enlarged view on
the following page).

Part Numbers

Part Description

SNAP-B4M* 4-module rack

SNAP-B8M* 8-module rack

SNAP-B12M* 12-module rack

SNAP-B16M* 16-module rack

SNAP-B8MC

SNAP-B12MC

SNAP-B16MC

SNAP-B8MC-P

SNAP-B12MC-P

SNAP-B16MC-P

SNAP-D64RS*

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

SNAP-FUSE4AB 4-amp fuse, 25-pack

SNAP-FUSE1AB 1-amp fuse, 25-pack

SNAP-TEX-DRC10 SNAP PAC rack DIN-rail adapter clip, 10-pack

SNAP-TEX-REC10N

SNAP-TEX-REC10W

* Factory Mutual (FM) approved

8-module rack with extra terminal block for field
wiring

12-module rack with extra terminal block for field
wiring

16-module rack with extra terminal block for field
wiring

8-module rack with extra terminal block for field
wiring, pluggable

12-module rack with extra terminal block for field
wiring, pluggable

16-module rack with extra terminal block for field
wiring, pluggable

16-module rack for digital-only SNAP Ultimate,
SNAP Ethernet, and SNAP-PDPRS64 Profibus
brains

Narrow end cap for SNAP PAC racks DIN-rail
assemblies, 10-pack

Wide end cap for SNAP PAC racks DIN-rail
assemblies with terminal strips, 10-pack

© 2001–2019 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.

DESCRIPTION (CONTINUED)

SNAP-B8M (8-Module Position I/O Mounting Rack)

Shown with B3000 brain (purchased separately)

DATA SHEET

Form 0784-190731

PAGE 2

SNAP-B8MC (8-Module Position I/O Mounting Rack)

Shown with B3000 brain (purchased separately)

Pluggable connector
for MC-P models

© 2001–2019 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

DATA SHEET

Form 0784-190731

PAGE 3

Part Number Description

1

Power2
Requirements

I/O Processor3
Compatibility

Replacement
Fuse

Operating
Temperature

Relative
Humidity

5.0 to 5.2 VDC

SNAP-B4M 4-module mixed

@ 1.8 Amps

max

SNAP-B8M 8-module mixed

4

4

,

4

5.0 to 5.2 VDC
@ 2.6 Amps

max

5.0 to 5.2 VDC
@ 3.4 Amps

max

5.0 to 5.2 VDC
@ 4.2 Amps

max

5.0 to 5.2 VDC
@ 1.8 Amps

max

SNAP-UP1-ADS

SNAP-B3000-ENET

SNAP-ENET-RTC

B3000

B3000-HA

SNAP-B4
SNAP-B6

SNAP-BRS

SNAP-BRS-HA

SNAP-B3000-

MODBUS

SNAP-UP1-D64

SNAP-ENET-D64

SNAP-PDPRS64

SNAP-FUSE4A

5

or Bel

5HF4

SNAP-FUSE1A

or Buss5

GDC1A

0 to 70 °C

95%,

non-con-

densing

SNAP-B8MC

SNAP-B8MC-P

8-module mixed,

terminal block

8-module mixed,

pluggable terminal block

SNAP-B12M 12-module mixed

SNAP-B12MC

SNAP-B12MC-P

12-module mixed4,

terminal block

12-module mixed

pluggable terminal block

SNAP-B16M 16-module mixed

SNAP-B16MC

SNAP-B16MC-P

SNAP-D64RS

16-module mixed4,

terminal block

16-module mixed4,

pluggable terminal block

16-module digital only

(limited digital functions)

1 “Mixed” means the rack can hold analog, digital, and serial modules. Most Ethernet-based I/O processors handle all these types
of modules; other processors do not. See the processor’s data sheet for details.
2 Power requirements shown are for a rack, a processor, and a full load of 2-channel analog modules (for the SNAP-D64RS, a full
load of 4-channel digital modules). Power requirements for other SNAP modules are higher. See module data sheets.
3 “I/O Processor” means a SNAP brain or on-the-rack controller.
4 Four-channel SNAP digital modules can be used in positions 0–7 only.
5 Manufacturer’s part number (not available through Opto 22).

© 2001–2019 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)

All models:
Power schematic

For fuse part numbers,
see Specifications on

page 3.

DATA SHEET

Form 0784-190731

PAGE 4

MC-P models
only: Pluggable

connector (wire
range 22–14 AWG)

All models: Module mating
connector pinout (female)

IMPORTANT: The mounting rack connector has 24 pins;
the module connector has 20 pins. The extra pins on the
mounting rack connector prevent misalignment of the
module during installation.

Extra pins for alignment

MC and MC-P models only: For detailed
information on terminal strip usage, see page 12
through page 16.

Extra pins for alignment

© 2001–2019 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

Dimensions—SNAP-D64RS Rack and B-Series Racks with Terminal Strips

NOTE: Brain is shown as a sample
for placement only. See page 3
for brain-rack compatibility.

DATA SHEET

Form 0784-190731

PAGE 5

Overall Length Dimensions (SNAP-D64RS and B-series racks with terminal strips)

Part Number Description

SNAP-B8MC

SNAP-B8MC-P

SNAP-B12MC

SNAP-B12MC-P

SNAP-B16MC

SNAP-B16MC-P

SNAP-D64RS 16-module rack, digital only 4.41 112.01 15.25 387.35

© 2001–2019 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.

8-module rack for other brains,

with terminal block

12-module rackfor other brains,

with terminal block

16-module rackfor other brains,

with terminal block

Width

(inches)

4.41 112.01 9.25 234.95

4.41 112.01 12.25 311.15

4.41 112.01 15.25 387.35

Width

(mm)

Length

(inches)

Length

(mm)