lowing functions (fig. 4):
entry panel volume control
receiver volume control
Function of each terminal (fig. 4)
5 −
12 V DC supply voltage
21 +
8 common call (for witness note)
11 audio to receiver
12 audio from receiver
14 enabling
NOTE. In installations which do not
cater for the enabling control, termi-
nal 14 can be connected to the earth
(module always on) or terminal 12
(module on only when receiver is lif-
ted).
Technical features
• Supply voltage: 12 VDC.
• Current demand: max. 50 mA (3