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MR-310,320 Series Relays
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MR-310,320 Series Data Page
All Engineering Data pages
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MR 300 Series Relays provide virtually endless
options for low-voltage application
interconnectability. This robust relay is available in
SPDT or DPDT configurations. Available in
enclosure, snap-track or spacer mounted versions
and single or multi-unit assemblies. Enclosure
configurations available with red or gray covers and
provide ‘energized on’ LED viewing port(s). No
special tools are required for installation.
Industrial/commercial sized PCB.
The MR3 utilizes all pre-qualified, reliable hi-grade U.L. recognized components. Trip circuitry is 100%
opto-isolated for complete non-interference and protection. Easy reversible selectability for trip/host
voltages, low and ultra-low current trip operation which allows proper matching of trip to type of load
switched (no tools necessary). Both trip and host inputs are diode protected against accidental
reversed polarity DC hook-up. These relays are polarized so that either or both may be supervised
and/or utilize input voltage logic for complex multi-criteria operations. Both trip and host are universal
for use with standard TTL, fire, security and building control voltages. All field wiring terminations are
done with positive clamping-action captive screw commercial/industrial terminals (#12 to #22 AWG).
The design provides for positive or negative trigger inputs, and an integral energized (on) red LED
indicator. There is also zener diode protection across relay coil. Environmental temperature ratings
are between 32°F to 120°F @ 93% RH non-condensing / freezing. The unit provides for use of two
differently referenced power sources on trip and host inputs. The MR3 will not false trip on less than
four volts and allows regulated and un-regulated power sources.
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Product Specifications
- 100% opto-isolated
- Low/Ultra-low current trip operation
- Diode protected against accidental reverse polarity hook-up
- LED light that indicates when the coil is charged
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