Siemens ADBH-11 Audible Fire Detector Mounting Base - Used It includes two individual relay

It includes two individual relay control modules and two Class B monitor modules

unshielded wire up to a distance of 10

out-of-sensitivity

With white and red plastic housings

Units were tested with canned smoke

Siemens ADBH-11 Audible Fire Detector Mounting Base - Used It includes two individual relaySiemens smoke detector accessory, Model ADBH 11, combines detector base and audible device functions. Typical applications for use of Model ADBH 11 include: dormitories, hotels, motels, apartments, etc. ADBH 11 meets the audibility requirements for smoke alarms as specified in UL217: Single and Multiple Station Smoke Alarms. The Siemens ADBH 11 Audible Detector Base is designed to be used with conventional Series 11 plug in detectors.