NFPA Standard-Specific Requirements
MS-9050UD PN 52413:C 01/23/08 193
C.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 Station/
Remote Station Transmitter module using End-of-Line Resistors (ELRs) with a value determined
by the Transmitter manufacturer. Power is also provided by the Central Station/Remote Station
Transmitter manufacturer. Refer to the Central Station/Remote Station Transmitter manufacturer’s
manual for details.
Figure C.4 FACP Dry Contacts Connection to Central Station/Remote Station Transmitter
Typical Central Station/Remote Station Transmitter Module
Typical Input Zone Triggers
MS-9050UD Main Circuit Board
Alarm
Trouble*
Supervisory
*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.
ms9050UDdryxmit.cdr
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