The group system allows you to switch off or on all receivers connected to individual relays using the central control buttons.
Functioning:
Green U/R LED indication:
* the LED blinks (ON: 30 msec / OFF: 1 sec) – standby mode; the receiver is switched off.
* the LED is constantly on – the receiver is switched onLC local control
The receiver is switched on after a pulse caused by pressing any one momentary LC button from the local control group. After the next pulse, the receiver will be switched off.
CC central control
SWITCH OFF ALL – after the pulse caused by pressing the momentary CCOFF button, all receivers will be switched off (regardless of their status – off or on).
SWITCH ALL ON – after the pulse caused by pressing the momentary CCON button, all receivers will be switched off (regardless of their status – off or on).
Attention!
The BIS-412 230V is compatible with bell pushes equipped with fluorescent lamps. 
Tips
Illuminated buttons
Due to the low supply voltage, illuminated buttons should not be used. Maximum load current The contact current given in the technical data is the maximum value and may be subject to restrictions – more information . If the information provided indicates that the relay in the device is insufficient, it is recommended to use an external switching element (e.g. contactor) adapted to switch large surge currents. State memory The relay version with the letter “M” has a contact position memory, i.e. after the power is turned on, the relay state that was at the time of the power cut will be restored.
