The signal line unit SPK-MAX-BSL is designed to work as part of the automatic fire and security protection system "SPECTR". The device is designed to organise security and fire alarms, to control external light, sound signalling or other executive devices.
The device has one ring two-wire signalling line (SL). The device monitors the status and controls the devices connected to the SL.
Addressable devices of SL can be fire, security detectors, input, output (executive) modules and notification devices
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