1 2 5 3 0 / 1 2 5 4 0 O W N E R ' S M A N U A L
P/N 447203 Issue I
V-17
Addressable Modules
Zone Monitor Module (9157)
The 9157 (System Sensor M500MB) monitor module provides (1) Style "B" (2-wire) initiating circuit or (1)
Style "D" (4-wire) initiating circuit for normally open dry contact fire alarm and supervisory (tamper)
devices. The 9157 is designed to mount directly inside a 4" square junction box. The 9157 monitor
module may be used to monitor a single unit or "zone" of units of "4-wire" (separately powered) smoke
detectors, manual stations, waterflow switches, tamper (supervisory) switches or other dry, normally open
contact initiation devices.
The 9157 uses a module address between 01 and 99 on an addressable device circuit. The 9157
module is regularly scanned by the control unit and checked for its current monitored device(s) status (i.e.
open (trouble), normal (EOL), shorted (alarm)). Each time the 9157 is scanned the front visible red LED
will flash. Once the control unit has received the status data it will interpret and respond to this data as
programmed. In the case of an alarm status or Style "D" open circuit, the front visible red LED will
illuminate and latch on the appropriate 9157 module(s) until the system is successfully reset.
NOTE:
The devices are set at the factory for address 00. This is a default code. During
installation set address to the predetermined address code.