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— BH501BHA Sounder base
Alternately
pull stations
The IDP-RELAY is an addressable relay module for use with the Honeywell Farenhyt Series fire alarm control panels (FACPs)
sensor type (such as photoelectric or ionization) and an analog value
Siemens OP121 Conventional Photoelectric Smoke Detector M500SF — BH501BHA Sounder baseThe microprocessor controlled, self diagnostic circuitry contained in the Siemens photoelectric (conventional) smoke detector, Model OP121, eliminates an installers need of using burdensome sensitivity test equipment. The Model OP121 auto sensitivity feature originates from its internal, self monitoring circuitry, providing dynamic verification of sensitivity and or required maintenance. This detector type is commonly found on the following Siemens