The Door Communication Bus Coupler - Gira 1288 00 Operating Instructions Manual

12
Additional supply (ZV)
The ZV terminals have two functions:
1. Power supply of call button illumination at the door sta-
tions.
The call buttons are constantly illuminated at the door sta-
tions with colour camera.
2. Additional power supply for bus devices which can no
longer be powered via the 2-wire bus. This could be a
third camera, for example.
If an additional supply is connected,
remove the jumpers
If an external supply is connected to the ZV terminals, the
jumpers between ZV and BUS must be removed at the
respective bus coupler.
The following connectors are also available:
System
The door communication inserts are connected to each other
with the 6-pole audio connection cable via these connectors.
Video
The door communication bus coupler is connected to the
flush-mounted inserts of the video devices, e.g. TFT colour
display, colour camera etc., via the 2-pole connector.
Rubber plugs in the connectors
The "second" connectors are sealed with rubber plugs. These
plugs can be removed if necessary.