Part number 20046, Rev 0
11
Remote Alarm Contacts
The Remote Alarm Relay is a single-pole double-throw (SPDT) relay that changes state (switches) with
the loss of line power or with the presence of an alarm condition.
NOTE: The relay is rated for pilot duty operation only. Do NOT use it for control switching. The relay
contacts and connections are rated at 30v/1A.
In normal applications, the relay signals remote alarms or central monitoring systems that an alarm
condition has occurred at the unit being monitored.
The relay will “pull-in” when line power is present. If an alarm condition lasts for a designated time (the
“relay delay”), the relay will “drop out”, causing the relay contacts to switch. If the alarm condition does
not last long enough for the relay delay to time out, the relay will not go into its alarm position. The
relay will also “drop out” if power to the alarm is lost, acting as a power loss detector.
The diagram below is an example of hooking up our external relay output to a remote alarm.