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and light steady red on alarm
The remaining units on the loop continue to fully operate
this module provides an address for any device or group of devices connected to this circuit
FST-851(A) Series thermal detectors use an innovative thermistor sensing circuit to produce 135°F/57°C fixed-temperature (FST-851/A) and rate-of-rise thermal detection (FST-851R/A) in a low-profile package
Operating Temperature: 32° F to 120° F (0 to 49° C)
Johnson Controls M501MJ MONITOR MODULE M500RF and light steady red onJohnson Controls M501MJ Single Input Monitor Module
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