Connecting External Alarms; Overview; Connection - Bacharach 3015-4286 Installation & Operating Instructions Manual

Connecting External Alarms

Overview

The AGM-SZ includes four SPDT relays whose contacts are rated 2 A at 250 VAC (inductive) 5 A at 250 VAC
(resistive). These relays are used for the connection of external alarm devices that are activated when the relay
is energized. The relays are factory assigned to energize under the following conditions:
Relay #1 Leak
Relay #2 Spill
Relay #3 Evacuate
Relay #4 Fault
Note that the alarm points of relays #1, #2, and #3 are set using the monitor's LEAKLVL, SPILLLVL, and
EVACLVL function screens (Page 16).

Connection

Use any of the service knockouts to gain cable access to the interior of the monitor. Locate the External Alarm
Relay Connector (Page 8). Secure the leads from the external alarm device and its power source to the
connector as shown in the diagram below.
The diagram on Page 11 shows a typical alarm device being connected to Relay 1. Note how power to this
device is being tapped off the monitor's AC input.
Each relay may be connected as normally open (NO), or normally closed (NC).
The relay contacts are rated 2 A at 250 VAC (inductive) 5 A at 250 VAC (resistive).
Power for the external alarm devices may be supplied from an external power source, or from
the monitor's AC input terminals.
10
Alarm Point 100 ppm
Alarm Point 300 ppm
Alarm Point 500 ppm
System Fault Event
External Alarm Relay Connector
Instruction 3015-4286