Pub. 42004-553D
G A I - T R O N I C S
®
A H U B B E L L C O M P A N Y
379-003 IP MRM
(Monitored Relay Module) Station
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374
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800-492-1212
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Fax: 610-796-5954
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Confidentiality Notice
This installation manual contains sensitive business and technical information that is confidential and
proprietary to GAI-Tronics. GAI-Tronics retains all intellectual property and other rights in or to the
information contained herein. Use this information only in connection with the operation of your GAI-
Tronics product or system. Do not disclose this manual in any form, in whole or in part, directly or
indirectly, to any third party.
General Information
The Model 379-003 IP MRM (Monitored Relay Module) station operates in a GAI-Tronics IP paging and
alarm system. The IP controller’s software configuration controls its operation.
The MRM includes eight relay output circuits. Each relay contains two type C contacts rated for 5 amps.
Relay outputs typically switch power to signaling devices such as beacons or strobes but are applicable to
any switching application that does not exceed the relay’s current rating. Relay circuits are programmable
to activate during:
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system alarms
•
pages
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trouble conditions
The MRM also includes eight input circuits (one for each output relay). Input circuits normally supervise
the relay output circuit cable to the signaling device (as described above). Monitoring for open circuits,
short circuits, and ground fault conditions occurs while the output circuit is inactive. The relay circuit will
not activate while a cable fault is present, preventing a possible dangerous condition.
Use relay inputs not supervising an output circuit for other functions. A voltage-free contact (opening or
closing) or the presence/absence of a 24 V dc input voltage activates each input. The IP MRM can
supervise the cabling between the input terminal and the remote contact device when using voltage-free
input contacts. The IP MRM can monitor the cable for open circuit, short circuit, and ground fault
conditions and automatically reports fault conditions to the system controller.
Program each input circuit to initiate one of the following functions in the GAI-Tronics IP paging and
alarm system:
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activate an alarm
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reset all alarms
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cancel the current alarm
•
report a fault condition
•
reset the system MCU