2.21 WRC Cell Detail (Watchdog / Relay - Comm’s Cell)
Cell type WRC is used to provide:-
WR cells are equipped with a four channel relay card which provide
• Four Common Relays which can be programmed for use as horn, common alarm or
watchdog relays
• Each of the output contacts can be set to N/C or N/O using a 3 way header and 2 way
shorting bar located on the card.
• The non alarm coil state of each relays can be programmed to be either EN or DE-EN
Comm’s Card that provides:
• One Isolated RS485 Port via a standard 9-way D-type connector.
• One Isolated 10/100Mb/s Ethernet port via a standard 8P8C (RJ45) connector.
• Rx and TX LED’s on both ports for diagnostic purposes.
• The Comms card contains a CR2032 coin cell (3.0V lithium, 180mAH)
The battery in this comms card can be replaced when it reaches the end of its life. In order to
replace the battery, power down the annunciator, remove the comms card, replace the battery
and refit the comms card. Refer to page 123 for instructions on the disposal of the spent battery.
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