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The System Sensor 2251TB is an Intelligent Addressable Photoelectric Smoke Sensor w/ Thermal (135°F / 57
The Edwards EST 5251FB is an intelligent Heat Detector
the CC2A connects the output circuit to the riser 1 bus or the riser 2 bus
Rotary address switches for fast installation Analog communicationsUL Listed
Edwards EST 5551F Heat Detector model 5551F PLUG-IN INTELLIGENT FIXED TEMPERATURE SENSOR WITH COMMUNICATION
Johnson Controls M301MJ Addressable Mini Monitor Module FCI M500X The System Sensor 2251TB isJohnson Controls M301MJ is a miniature monitor module that supervises a Style B (Class B) circuit of dry contact input devices. The M301MJ is intended for use in intelligent, two wire systems where the individual address of each module is selected using rotary switches. It provides a two wire initiating device circuit for normally open contact fire alarm and security devices.