GAI-Tronics 379-001 User Manual

Pub. 42004-714L2C

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Model 379-001

Monitored Relay Module (MRM) Station

Confidential ity Notice

This manual is provided solely as an operational, installation, and maintenance guide and 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,
and such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.

General Information

The Model 379-001 Monitored Relay Module (MRM) Station is used in SmartSeries ADVANCE
Systems. Operation is controlled by the system’s Master Control Unit (MCU) programming.

The MRM provides eight relay output circuits. Each relay contains two type “C” contacts rated for 5A.
Relay outputs are typically used for switching power to signaling devices such as beacons or strobes but
can be used for any switching application that does not exceed the relay’s current rating. Relay circuits
can be programmed to activate during system alarms, pages, or trouble condition.

The MRM also contains eight input circuits. Input circuits can be used supervise the cable integrity
connecting the relay output to the signaling device (as described above). During an inactive state, the
cable is monitored for open circuit, short circuit and ground fault conditions. If a cable fault is detected,
the relay circuit will not activate, preventing a possible dangerous condition. The fault condition is
automatically reported to the MCU.

For each relay circuit not requiring supervision, one input circuit is available for other functions. Inputs
are activated by a voltage-free contact (either opening or closing) or the presence/absence of a 24 V dc
input voltage. When using inputs from voltage-free contacts, the MRM can supervise the cabling
between the input terminal and the remote contact closure device. The cable is monitored for open
circuit, short circuit and ground fault conditions. The fault condition is automatically reported to the
MCU.

Each input circuit can be programmed to initiate one of the following functions in the ADVANCE
System.

• Activate an alarm

• Reset all alarms

• Cancel the current alarm

• Report a fault condition

• Reset the system MCU

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

V

ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

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Model 379-001 Monitored Relay Module Station Page: 2 of 9

The Model 379-001 Monitored Relay Module (MRM) Station components are housed in a NEMA 4X
stainless steel enclosure measuring 13.0 W × 14.3 H × 6.23 D inches. Components include a 12 V dc
power supply, a 12579-003 Monitored Relay Module, and two terminal blocks.

The 12579-003 Monitored Relay Module is comprised of three components: the 69613-001TR CPU and
the 69251-201TR Monitored-Input PCBA, and the 69252-001TR Relay PCBA. Refer to Figure 1 for
component locations.

The scope of this manual is limited to the mounting and wiring connections for the Model 379-001
Station. Refer to Pub. 42004-716L2 for additional information on the 12579-003 Monitored Relay
Module.

Figure 1. Model 379-001 MRM Station (Interior View)

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Model 379-001 Monitored Relay Module Station Page: 3 of 9

Installation

CAUTION

Do not install this equipment in hazardous areas other than those indicated on the approval listing
in the “Specifications” section of this manual. Such installation may cause a safety hazard and
consequent injury or property damage. Disconnect power before installing or removing the MRM.

Mounting

The Model 379-001 MRM Station enclosure is not supplied with conduit or cable gland holes since cable
quantity, size, and entry location vary with each installation.

Drill or punch openings at the required locations before mounting the enclosure. Typically multiple
cables entries are required for SmartSeries Page/Party

®

system cable and input wiring. Refer to the
Wiring section below. Use caution when drilling or punching the enclosure to avoid damaging the
internal components. Bottom cable entry is recommended to prevent moisture from entering the
enclosure and dripping onto the terminals or circuit boards.

Mount the enclosure to a suitable surface using appropriate customer-supplied hardware. Refer to Figure
1 for mounting hole dimensions.

Remove the shipping tie-wrap that is securing the PCBA to its mounting Snaptrack.

Wiring

The MRM Station is parallel-wired to the Page/Party® system cable in the same fashion as SmartSeries
handset/speaker stations. The system cable distributes ac power, party line audio and page line to the
stations. The MRM requires only ac power and page line connections from the system cable. Spare
terminals are provided for the unused conductors in the system cable. A separate cable(s) is generally
used for the input connections. Each connection is explained below.

Power

120 V ac power is connected to terminal block TB13 at the top of the panel. Refer to Figure 1. AC
power is accessed from the Page/Party

Function Terminal Block System Cable Wire Color

®

system cable per the following table.

AC Line (hot) TB13-1 Black

Neutral TB13-2 White

Ground TB13-3 Green/yellow

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