Two-Wire Data Control Bus - Technicolor - Thomson LDK 4629/00 Technical Manual

Operational control panel
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Two-wire Data Control Bus

The two-wire data bus is used to connect all control
units in the Series 9000 control system. The data
cable loops-through from one unit to the other. The
order of connection is not important, however, the total
length of the cables must not exceed 310 meters
(1,118 ft).
Each unit connected directly to the data bus, either
Base station, camera head or OCP, is identified by a
number. In order to ensure, for example, that OCP 1
controls the camera connected to Base station 1, the
same unique number must be assigned to both OCP 1
and Base station 1. The assignment number is set
internally on the units during installation.
The assignment number of a camera head connected
to a Base station is automatically set to the number of
the Base station to which it is connected. The number
on the Base station, which is connected to the data
bus, must be set to the number of the assigned control
panel.
It is important to set a unique number for each Base
station/OCP group as unpredictable control situations
could arise otherwise.
The MCP is also connected to the data bus, however,
it is not necessary to set an internal assignment
number. The camera or cameras to be controlled are
selected on the MCP front panel itself when operating
the unit.
Note
A maximum of 15 looped-through standard camera
systems in one chain can be handeld, however, in a
multiple system the load of a LDK 23 HS (mkII) is
twice the load of a standard camera.
14
Technical Manual LDK 4629/00
- Operational Control Panel
02.34.2

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