CANOGA PERKINS 3240S SNMP Managed Fiber Optic Multiplexer - Manual (Page 32)

3240S F I B E R O P T I C M U L T I P L E X E R
3240S Fiber Optic Multiplexer
2.4.6 Alarm Relay (Non-Redundant Optics)
The Alarm Relay is the same relay as the Fault Relay. The relay is deemed the Alarm Relay on a 3240S that is not equipped with
redundant optics, and the Fault Relay when the 3240S operates with fiber optic redundancy. The alarm (ALM) jack provides
a set of relay contacts that are activated by:
• A loss of composite synchronization.
• A power failure.
The relay follows the SYNC LOSS and LOS Indicators. The Alarm Relay Contacts can be configured via W12/W13 on the
main system board of the 3240S as either normally open (NO) or normally closed (NC). Insert the jumper across W12 to set
the relay contacts as NO. Insert the jumper across W13 to set the relay contacts as NC. The tip and ring terminals of the jack
carry the relay contacts. The I/O cards must be removed from the chassis to access W12/W13, where it is located directly
behind the MAST/SLV Switch.
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