The WSD-1 audible signal switch is destined for collaboration with the acoustic alarm devices SA-K5, SA-K6, SA-K7 and the voice alarm devices SG-Pgw2 and SAOZ-Pk2. The switch turns off an acoustic signal coming from the above mentioned alarm devices. An application of one WSD-1 audible signal switch allows for turning off only one alarm device. The WSD audible signal switch is applied in fire alarm systems.
The switch consists of a plastic housing with a single key. There is a signal element in the key. Alarm device cables are connected to terminals on a printed-circuit board. The switch is mounted to the wall with two screws. An alarm signal, which sets off in the fire alarm system, sets off the SA-K, SA-KN, SG-Pgw2 or SAOZ-Pk2 types alarm devices connected to it. An acoustic signal of the alarm device can be switched off by using the WSD-1 audible switch key. This fact is signalled by a flashing LED diode. The diode flashes as long as the alarm signal from the fire alarm control unit fades out as a result of resetting the control unit. If another alarm signal sets off in the control unit or it sets off because a fire detector set off the system, it sets off relevant alarm devices again.