Gira 1287 00 Operating Instructions Manual page 13

Additional supply (ZV)
The ZV terminals have two functions:
1. Power supply of call button illumination at the door
stations. The call buttons are constantly illuminated at the
door stations. If the call button illumination is to be
switched off permanently, the jumpers between the bus
and ZV terminal must be removed.
2. Additional power supply for bus devices which can no
longer be powered via the 2-wire bus.
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Connecting an additional power supply
If an additional power supply is connected to the ZV termi-
nals, the jumpers must be removed.
System
The flush-mounted 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.
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Rubber plugs in the connectors
The "second" connectors are sealed with rubber plugs. These
plugs can be removed if necessary.
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