The XP95 Sounder VAD Base is a loop-powered sounder and EN 54-23 approved VAD combined with a standard intelligent mounting base. It is used to signal a fire alarm in enclosed areas.
 
You can perform a ‘Self Test’ this is an important safety feature which has been incorporated into the Sounder VAD Bases: when it is switched on it tests itself by checking the actual sound output and flash operation.
 
There are 3 possible outcomes from the test, if the transmitter reads:
A value of 1 (=Sounder fault) this means there was no sound detected in 5 seconds of the sounder being switched on.
A value of 2 (=VAD fault) means there is no current being drawn by the LED’s.
A value of 3 (=Sounder and VAD fault) where neither of the above elements are operating correctly.
 
If no sound is detected within 5 seconds of the Sounder VAD Bases being switched on it will transmit an analogue value of 1 (= sounder fault) when it is next polled.
 
This feature can also be used during commissioning or periodical maintenance testing. Simply activate the Sounder VAD for at least 5 seconds and check the control panel for a fault signal. If none is received, the Sounder VAD Base is working properly.