SYSTEM SENSOR 2251 Intelligent Photoelectric Smoke Sensor 18/12 and an exhaust tube

and an exhaust tube

MS-10UD requires two CAC-5X modules

as well as other manufacturers' controls

p/n 500-636078

A green LED on the 6815 board blinks to indicate good communication

SYSTEM SENSOR 2251 Intelligent Photoelectric Smoke Sensor 18/12 and an exhaust tubeModel 2251 is a plug in type smoke sensor that combines a photoelectronic sensing chamber with addressable analog communications. The sensor transmits an analog representation of smoke density over a communication line to a control panel. Rotary decade switches are provided for setting the sensors address. Two LEDs on the sensor are controlled by the panel to indicate sensor status. An output is provided for connection to an optional remote LED