Specifications

Halogen Gas Monitor – Multi Zone
Instruction 3015-5074 23
Connecting External Alarms
Overview
Each HGM-MZ includes 4, Form C, SPDT relays. The contacts are rated 2A at 250 VAC and 2A at 30 VAC.
These relays are used for the connection of external alarm devices. The relays are factory assigned to the
following conditions:
Relay #1 Leak
Relay #2 Spill
Relay #3 Evacuate
Relay #4 Fault
Connection
Use the AC conduit or any of the remaining service knockouts to gain cable access to the interior of the
monitor. Locate the relay connector (page 15) and remove it from the circuit board. Secure the leads to the
connector orienting them as shown in the diagram below. When you are through securing the connections,
carefully plug the connector back onto the circuit board.
HGM-MZ Relay Connector
NOTE: Each relay may be connected as normally open (NO), or normally closed (NC).
The relay contacts are rated 2A at 250 VAC and 2A at 30 VAC.
Latching / Non-Latching – refer to page 26 to select Alarm Ack Mode.
Alarm power source – power for the alarm devices connected to the relay contacts may be supplied from the
AC Power Input Connector (page 14).