SNAP B-Series Racks
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
© 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
DATA SHEET
Form 0784-140228
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been replaced by SNAP PAC racks.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.
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).
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.
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 8-mo dule rack with extra termin al block
for field wiring
SNAP-B12MC 12-module rack with extra terminal block
for field wiring
SNAP-B16MC 16-module rack with extra terminal block
for field wiring
SNAP-B8MC-P 8-module rack with extra terminal block
for field wiring, pluggable
SNAP-B12MC-P 12-module rack with extra terminal block
for field wiring, pluggable
SNAP-B16MC-P 16-module rack with extra terminal block
for field wiring, pluggable
SNAP-D64RS* 16-module rack for digital-only SNAP
Ultimate, SNAP Ethernet, and
SNAP-PDPRS64 Profibus brains
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 Narrow end c ap for SNAP PAC racks
DIN-rail as semblies, 10-pack
SNAP-TEX-REC10W Wide end cap for SNAP PAC racks DIN -
rail assemblies with terminal strips, 10-
pack
* Factory Mutual (FM) approved
SNAP B-Series Racks
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
2
DATA SHEET
Form 0784-140228
Description (continued)
SNAP-B8M (8-Module Position I/O Mounting Rack)
Shown with B3000 brain (purchased separately)
SNAP-B8MC (8-Module Position I/O Mounting Rack)
Shown with B3000 brain (purchased separately)
Pluggable connector
for MC-P models
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
3
Specifications
Part Number Description1Power2
Requirements I/O Processor3
Compatibility Replacement
Fuse Operating
Temperature Relative
Humidity
SNAP-B4M 4-module mixed 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-FUSE4A
or Bel5 5HF4 0 to 70 °C 95%, non-
condensing
SNAP-B8M 8-module mixed
5.0 to 5.2 VDC
@ 2.6 Amps
max
SNAP-B8MC 8-module mixed,
terminal block
SNAP-B8MC-P 8-module mixed,
pluggable terminal block
SNAP-B12M 12-module mixed4
5.0 to 5.2 VDC
@ 3.4 Amps
max
SNAP-B12MC 12-module mixed4,
terminal block
SNAP-B12MC-P 12-module mixed4,
pluggable terminal block
SNAP-B16M 16-module mixed4
5.0 to 5.2 VDC
@ 4.2 Amps
max
SNAP-B16MC 16-module mixed4,
terminal block
SNAP-B16MC-P 16-module mixed4,
pluggable terminal block
SNAP-D64RS 16-module digital only
(limited digital functions)
5.0 to 5.2 VDC
@ 1.8 Amps
max
SNAP-UP1-D64
SNAP-ENET-D64
SNAP-PDPRS64
SNAP-FUSE1A
or Buss5
GDC1A
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).
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
4
DATA SHEET
Form 0784-140228
Specifications (continued)
MC-P models
only: Pluggable
connector (wire
range 22–14 AWG)
MC and MC-P models only: For detailed
information on terminal strip usage, see page 12
through page 16.
All models: Module mating
connector pinout (female)
All models:
Power schematic
For fuse part numbers,
see Specifications on
page 3.
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
Extra pins for alignment
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
5
Dimensional Drawings
Overall Length Dimensions (SNAP-D64RS and B-series racks with terminal strips)
Part Number Description Width
(inches) Width
(mm) Length
(inches) Length
(mm)
SNAP-B8MC
SNAP-B8MC-P 8-module rack for other brains,
with terminal block 4.41 112.01 9.25 234.95
SNAP-B12MC
SNAP-B12MC-P 12-module rackfor other brains,
with terminal block 4.41 112.01 12.25 311.15
SNAP-B16MC
SNAP-B16MC-P 16-module rackfor other brains,
with terminal block 4.41 112.01 15.25 387.35
SNAP-D64RS 16-module rack, digital only 4.41 112.01 15.25 387.35
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.
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
6
DATA SHEET
Form 0784-140228
Dimensional Drawings (continued)
Overall Length Dimensions (B-series racks without terminal strips)
Part Number Description Width
(inches) Width
(mm) Length
(inches) Length
(mm)
SNAP-B4M 4-module rack 3.91 99.31 6.24 158.41
SNAP-B8M 8-module rack 3.91 99.31 9.24 234.70
SNAP-B12M 12-module rack 3.91 99.31 12.24 310.90
SNAP-B16M 16-module rack 3.91 99.31 15.24 387.10
Dimensions—B-Series Racks Without Terminal Strips
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
7
Dimensional Drawings (continued)
SNAP-D64RS Rack and B-Series Racks with Terminal Strips:
Right Side View with DIN-Rail Option Installed
Processor Height* Processor Part Number Rack
4.12 in. (104.6 mm)
SNAP-UP1-ADS
SNAP-B3000-ENET
SNAP-ENET-RTC B-series
SNAP-UP1-D64
SNAP-ENET-D64 SNAP-D64RS
3.70 in. (95.9 mm)
B3000
SNAP-B4
SNAP-B6
SNAP-BRS
B3000-HA
SNAP-BRS-HA
SNAP-B3000-MODBUS B-series
* Height listed is from the processor’s mounting surface to the highest part of the proces-
sor. Height does not include wiring or cables.
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
8
DATA SHEET
Form 0784-140228
Dimensional Drawings (continued)
B-Series Racks Without Terminal Strips:
Right Side View with DIN-Rail Option Installed
Processor Height* Processor Part Number
4.12 in. (104.6 mm) SNAP-UP1-ADS
SNAP-B3000-ENET SNAP-ENET-RTC
3.70 in. (95.9 mm)
B3000
SNAP-B4
SNAP-B6
B3000-HA
SNAP-BRS
SNAP-BRS-HA
SNAP-B3000-MODBUS
* Height listed is from the processor’s mounting surface to the highest part
of the processor. It does not include wiring or cables.
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
9
Mounting
NOTE: If you are not using hold-down screws, the SNAP rack
assembly should be mounted horizontally.
Use the following steps to mount racks as shown in the
diagrams on the next two pages.
Preferred Method: Template
(Product on site)
1. Use SNAP rack mounting extrusion as template.
2. Be sure to use the diagrams on the next two pages 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 diagrams on the next two pages, determine CL1
mounting hole positions. (CL1 is located on the left side of
all SNAP 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.
Center-to-Center Length (All Models)
Part Number Description Center-to-Center
Length Number of Center
Positions
SNAP-B4M 4-module rack 4.01 in. 2
SNAP-B8M
SNAP-B8MC
SNAP-B8MC-P 8-module rack 3.51 in. 3
SNAP-B12M
SNAP-B12MC
SNAP-B12MC-P 12-module rack 5.01 in. 3
SNAP-B16M
SNAP-B16MC
SNAP-B16MC-P
SNAP-D64RS
16-module rack 4.34 in. 4
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
10
DATA SHEET
Form 0784-140228
Mounting (continued)
SNAP-D64RS Rack and B-Series Racks with Terminal Strips:
Typical Plain View of SNAP Mounting Extrusion
See instructions and table on page 9.
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
11
Mounting (continued)
B-Series Racks Without Terminal Strips:
Typical Plain View of SNAP Mounting Extrusion
See instructions and table on page 9.
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
12
DATA SHEET
Form 0784-140228
Wiring Diagrams—B-Series Models with Terminal Strips
Terminal Strip Usage—Digital
NOTE: Consult the SNAP module
data sheet for your specific
module for additional wiring
information.
Example: Digital Input Using Terminal Strip
Example: Digital AC Output Using Terminal Strip
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
13
Wiring Diagrams—B-Series Models with Terminal Strips
Terminal Strip Usage—Digital (continued)
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
14
DATA SHEET
Form 0784-140228
Wiring Diagrams—B-Series Models with Terminal Strips
Terminal Strip Usage—Analog
NOTE: Consult the SNAP module
data sheet for your specific
module for additional wiring
information.
Example: Analog Input (Current: Negative) Using Terminal Strip
Example: Analog Input (Current: Positive) Using Terminal Strip
SNAP B-Series Racks
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
© 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 B-Series Racks DATA SHEET
Form 0784-140228
PAGE
15
Wiring Diagrams—B-Series Models with Terminal Strips
Terminal Strip Usage—Analog (continued)
NOTE: Consult the SNAP module
data sheet for your specific
module for additional wiring
information.
Example: Analog Output (4–20 mA Current: Sinking) Using Terminal Strip
Example: Analog Output (4–20 mA Current: Sourcing) Using Terminal Strip
SNAP B-Series Racks
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
© 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 B-Series Racks
PAGE
16
DATA SHEET
Form 0784-140228
Wiring Diagrams—B-Series Models with Terminal Strips
Terminal Strip Usage—Analog (continued)
NOTE: Consult the SNAP module
data sheet for your specific
module for additional wiring
information.
Example: Analog Input (Voltage) Using Terminal Strip