SNAP Mechanical Power
Relay Output Modules
PAGE
1
DATA SHEET
Form 1967-160920
SNAP Mechanical Power Relay Output 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
© 2011–2016 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
Four isolated channels
Each channel switches up to 6 A at 250 VAC or 30 VDC
Channel-specific LEDs
Operating temperature: -20 to 70 °C
UL approved
Description
SNAP mechanical power relay output modules offer four
channels for switching loads of up to 6 amps at 250 VAC or
30 VDC.
These modules handle more current than other SNAP output
modules. Each contact can carry 6 amps, and having more
than one channel on at the same time does not reduce the
amount of power each channel can carry.
These are form C modules, so each of the four mechanical
contacts can be wired as normally open or normally closed.
Fusing is not provided; you must provide fusing when wiring
the module.
SNAP mechanical power relay output modules provide
channel-to-channel isolation. These modules can
mechanically switch either AC or DC loads, potentially
reducing the number of modules needed.
Additionally, SNAP mechanical power relay output modules
offer little or no leakage current when the contacts are open.
In contrast, possible leakage current in solid-state SNAP AC
output modules might cause an electronic input to stick in the
ON state. These modules are suitable for piloting electronic
coil contactors.
NOTE: These modules may not be suitable for low-level switching.
NOTE: Transient protection is recommended for inductive loads.
For DC loads, install a reverse-biased diode, such as an 1N4005 (or
equivalent) at the load.
Two mechanical power relay output modules are available:
the SNAP-OMR6T-C and the SNAP-OMR6-C. They are
identical except that the SNAP-OMR6-C does not include
integrated transient suppression.
The SNAP-OMR6T-C is recommended for most applications,
including applications with long wire runs.
NOTE: For very high inductive loads, additional transient
protection is recommended.
When using the SNAP-OMR6-C, you must provide transient
suppression at the load. If long wire runs are used, transient
suppression is required at the terminals of the module as well.
NOTE: SNAP-OMR6-C modules manufactured prior to March 2014
have four black field wiring connectors; newer modules have a
single large gray connector as shown above. Field connector
wiring and module function are identical. Note torque differences
in “Specifications” on page 3.
Compatibility
Part of the SNAP PAC System, these modules mount on a
SNAP PAC rack with a SNAP PAC brain or rack-mounted
controller. Analog, digital, and serial I/O modules can all be on
the same rack. This kind of I/O unit is also well suited for
PC-based control or for use as intelligent remote I/O for an
Allen-Bradley PLC system.
PAC ProjectThe SNAP-OMR6T-C is supported in PAC
Project R9.4009 and higher. The SNAP-OMR6-C is supported in
PAC Project R9.2 and higher.
Brains—SNAP mechanical power relay output modules are
compatible with all SNAP PAC brains and rack-mounted
controllers, including both standard wired models and
Wired+Wireless models.
Part Number
Part Description
SNAP-OMR6T-C
SNAP 4-channel Mechanical Power Relay
Module, SPDT (Form C), with Integrated
Transient Suppression
SNAP-OMR6-C SNAP 4-channel Mechanical Power Relay
Module, SPDT (Form C)
SNAP-OMR6T-C
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules
PAGE
2
DATA SHEET
Form 1967-160920
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
© 2011–2016 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.
Legacy hardwareThese modules are also compatible with
SNAP Ultimate, SNAP Ethernet, and SNAP Simple brains, as
well as other SNAP brains such as the serial B3000 and the
B3000-B. They can be mounted on both B-series and M-series
mounting racks.
SNAP-OMR6-A
A previous module, the form A SNAP-OMR6-A, is no longer
available. Use the SNAP-OMR6T-C as a pin-identical, drop-in
replacement for this obsolete module.
Specifications and wiring diagrams for the obsolete
SNAP-OMR6-A are included in this data sheet for reference
only.
Installation
The following diagram shows part of a SNAP mounting rack.
Modules snap securely into place in the row of connectors on
the rack. Each module connector is numbered, starting with
position zero.
1. Place the rack so that the module connector numbers
are right-side up, with zero on the left, as shown in the
diagram above. (If your rack has screw connectors, the
screw connectors will be at the bottom.)
NOTE: Check the data sheet or user’s guide for the brain or
on-the-rack controller you are using to determine any
restrictions on module placement.
2. Position the module over the module connector,
aligning the small slot at the base of the module with
the retention bar on the rack. When positioning modules
next to each other, be sure to align the male and female
module keys at the tops of the modules before snapping
a module into position.
3. With the module correctly aligned, push on the module
to snap it into place.
4. Use standard 4-40 x 1/2 truss-head Phillips hold-down
screws (provided) to secure both sides of each module.
CAUTION: Do not overtighten screws. Torque for hold-
down screws: 4 in-lb (0.45 N-m)
5. Follow the wiring diagrams on page 5 to attach the
module to field devices. Torque for connector screws: 1.7
in-lb (0.2 N-m)
Modules require a special tool (provided) for removal.
Module
position zero Module connectors
Processor connector Retention bar
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules DATA SHEET
Form 1967-160920
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
© 2011–2016 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-OMR6-C SNAP-OMR6T-C
Field Side Ratings (each channel)
Contact Configuration Form C (SPDT, normally open or closed) Form C (SPDT, normally open or closed)
Line Voltage - Range 0–250 VAC or 5–30 VDC 0–250 VAC or 5–30 VDC
Current Rating 6 amps switching @ 250 VAC / 30 VDC 6 amps switching @ 250 VAC / 30 VDC
Surge Current 6 amps 6 amps
Minimum Load 5 VDC, 10 mA 5 VDC, 10 mA
Contact Resistance 100 milliohms 100 milliohms
Leakage Current none < 1 microamp @ 250 VAC
Clamping Voltage (for transient
suppression) External transient suppression required 440 V nominal
Duty Cycle -- Not applicable -- 1 Hz
Switching Power 1500 VA / 144 W (DC) 1500 VA / 144 W (DC)
Peak Blocking Voltage 250 VAC @ 360 V
pk
250 VAC @ 360 V
pk
Channel-to-channel isolation 300 VAC (1500 Vtransient) 300 VAC (1500 Vtransient)
Logic Side Ratings
Pickup Voltage 1 V @ 2 mA 1 V @ 2 mA
Dropout Voltage 4 VDC 4 VDC
Control Resistance 220 ohms 220 ohms
Logic Supply Voltage 5 VDC ± 0.25 VDC 5 VDC ± 0.25 VDC
Logic Supply Current 160 mA maximum 160 mA maximum
Module Ratings
Number of Channels Per Module 4 4
Turn-on Time 8 milliseconds 8 milliseconds
Turn-off Time 8 milliseconds 8 milliseconds
Torque, hold-down screws 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m)
Torque, connector screws Single gray connector: 5.26 in-lb (0.6 N-m)
Black connectors: 1.7 in-lb (0.2 N-m) 5.26 in-lb (0.6 N-m)
Temperature -20 to 70 °C, operating
-30 to 85 °C, storage
-20 to 70 °C, operating
-30 to 85 °C, storage
Agency Approvals UL, CE, RoHS, DFARS UL, CE RoHS, DFARS
Mechanical Life 10 x 106 operations 10 x 106 operations
Operational Life 30 x 103 operations 30 x 103 operations
Warranty 30 months 30 months
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules
PAGE
4
DATA SHEET
Form 1967-160920
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
© 2011–2016 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)
IMPORTANT: Specifications for the SNAP-OMR6-A are
included for reference only. This module is no longer available.
SNAP-OMR6-A [Obsolete]
Field Side Ratings (each channel)
Contact Configuration Form A (SPST, normally open)
Line Voltage - Range 0–250 VAC or 0–30 VDC
Current Rating 6 amps switching @ 250 VAC / 30 VDC
Surge Current 6 amps
Minimum Load 5 VDC, 10 mA
Contact Resistance 100 milliohms
Switching Power 1500 VA / 144 W (DC)
Peak Blocking Voltage 250 VAC / 30 VDC
Channel-to-channel isolation 300 VAC (1500 Vtransient)
Logic Side Ratings
Pickup Voltage 1 V @ 2 mA
Dropout Voltage 4 VDC
Control Resistance 220 ohms
Logic Supply Voltage 5 VDC ± 0.25 VDC
Logic Supply Current 160 mA maximum
Module Ratings
Number of Channels Per Module 4
Turn-on Time 8 milliseconds
Turn-off Time 8 milliseconds
Torque, hold-down screws 4 in-lb (0.45 N-m)
Torque, connector screws Single gray connector: 5.26 in-lb (0.6 N-m)
Black connectors: 1.7 in-lb (0.2 N-m)
Temperature -20 to 70 °C, operating
-30 to 85 °C, storage
Agency Approvals CE, RoHS, DFARS
Mechanical Life 10 x 106 operations
Operational Life 30 x 103 operations
Warranty 30 months
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules DATA SHEET
Form 1967-160920
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
© 2011–2016 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.
Wiring Diagrams
NO NC
C
CH3
SNAP-OMR6T-C Field Connections
Note: User must provide own fusing.
NO NC
C
CH2
NO NC
C
CH1
NO NC
C
CH0
NOTE: External transient protection is recommended for highly
inductive loads.
See page 6 for SNAP-OMR6-C and page 7 for SNAP-OMR6-A.
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules
PAGE
6
DATA SHEET
Form 1967-160920
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
© 2011–2016 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.
Wiring Diagrams (Continued)
SNAP-OMR6-C Field Connections - Older Terminals (black)
Note: User must provide own fusing.
NO NC
C
CH3
SNAP-OMR6-C Field Connections - Newer Terminal (gray)
Note: User must provide own fusing.
NO NC
C
CH2
NO NC
C
CH1
NO NC
C
CH0
NO NC
C
CH3
NO NC
C
CH2
NO NC
C
CH1
NO NC
C
CH0
NOTE: Transient protection is recommended for inductive loads.
NOTE: For DC loads, install a reverse-biased diode, such as an 1N4005
(or equivalent) at the load.
NOTE: Transient protection is recommended for inductive loads.
NOTE: For DC loads, install a reverse-biased diode, such as an 1N4005
(or equivalent) at the load.
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules DATA SHEET
Form 1967-160920
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
© 2011–2016 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.
Wiring Diagrams (Continued)
SNAP-OMR6-A Field Connections - Older Terminals (black)
Note: User must provide own fusing.
NO NC
C
CH3
SNAP-OMR6-A Field Connections - Newer Terminal (gray)
Note: User must provide own fusing.
NO NC
C
CH2
NO NC
C
CH1
NO NC
C
CH0
NO NC
C
CH3
NO NC
C
CH2
NO NC
C
CH1
NO NC
C
CH0
NOTE: Transient protection is recommended for inductive loads.
NOTE: For DC loads, install a reverse-biased diode, such as an 1N4005
(or equivalent) at the load.
NOTE: Transient protection is recommended for inductive loads.
NOTE: For DC loads, install a reverse-biased diode, such as an 1N4005
(or equivalent) at the load.
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules
PAGE
8
DATA SHEET
Form 1967-160920
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
© 2011–2016 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
Newer field wiring terminal: one 12-position connector
Older field wiring terminals: four 3-position connectors
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules DATA SHEET
Form 1967-160920
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
© 2011–2016 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)
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.
SNAP Mechanical Power Relay Output Modules
SNAP Mechanical Power Relay Output Modules
PAGE
10
DATA SHEET
Form 1967-160920
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
© 2011–2016 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)
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