GAI-Tronics 379-002 Monitored RElay Module (MRM) Stations - Manual (Page 6)

Pub. 42004-491A
Model 379-002 Monitored Relay Module Station Page 6 of 13
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Mode 1: IDC Line Supervision Multiple Switch
In this mode any number of normally-open dry contact closures may be installed on the line. The loop is
monitored for ground faults and open circuits in Mode 1. The end-of-line device is a 20 k
, 5% tolerance
resistor.
Figure 4. IDC Line Supervision Multiple Switch
N OTE : The 20 k
, 5% tolerance resistor is not included with the MRM. The resistor is included in a kit
(12509-004), which must be ordered separately.