MS-5UD & MS-10UD Series Manual — P/N 52626:C2  1/24/2012 151
Central Station/Remote Station Transmitter: Connection to FACP Dry Contacts NFPA Standard-Specific Requirements
B.1  Central Station/Remote Station Transmitter: Connection 
to FACP Dry Contacts
The dry contacts of the FACP programmable relays can be used to trip a UL-864 Listed Central 
Station/Remote Station Transmitter.  The FACP contacts must be supervised by the Central Sta-
tion/Remote Station Transmitter module using End-of-Line Resistors (ELRs) with a value deter-
mined by the Transmitter manufacturer.  Power is also provided by the Central Station/Remote 
Station Transmitter manufacturer.  Refer to the Central Station/Remote Station Transmitter manu-
facturer’s manual for details. 
Figure B.5  FACP Dry Contacts Connection to Central Station/Remote Station Transmitter
Typical Central Station/Remote Station Transmitter Module
Typical Input Zone Triggers
Fire Alarm Control Panel
Alarm
Superv.
Trouble*
*Note:  The Trouble Relay is a 
fail-safe relay.  With power 
applied to the FACP and no 
troubles in the panel, the wiring 
should be connected to the NO 
and C contacts as indicated in the 
illustration.