Siemens HI921 SF 20/02 Both modules occupy one rail

Both modules occupy one rail space in the fire alarm control cabinet and provide removable field wiring terminals to aid installation

Its rugged toggle switch design offers exceptional resistance to accidental alarms caused by sudden vibration or shock

self-diagnostics performed every 10 seconds

CTX1300 2014

They Upgraded from a conventional panel to an Edwards intelligent system

Siemens HI921 SF 20/02 Both modules occupy one railThe Siemens HI921 is an intelligent, addressable thermal (heat) detector designed to provide advanced fire detection through precise temperature monitoring. Incorporating state of the art thermistor technology and microprocessor based signal processing, the HI921 ensures high reliability and accuracy in various environments. Offers seven pre programmed temperature settings ranging from 135F (57C) to 174F (79C), including both fixed and rate of rise