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10.2.10
Separating the control unit and computer unit
Introduction
The control unit is separated from the computer unit to carry out repairs or to replace the
control unit, for example.
Procedure
1. Isolate the device from mains.
2. Open the switchgear cabinet.
3. Remove the device from the switchgear cabinet: Secure the device against falling out and
unscrew it. Or remove the clamps which secure the control unit to the installation wall, as
shown in the installation cut-out in the dimensions diagram.
4. Carefully set the unit down with the control unit at the bottom.
5. Open the device.
6. Make a note of the arrangement of the ribbon cable plugs in the sockets on the
motherboard.
7. Detach the plugs (2) and (3) and also plug (4) when a 19" touch or key panel is used.
Figure 10-12 Ribbon cable and IDE cable on the motherboard
Panel PC IL 77
Operating Instructions, Edition 10/2004, A5E00339979-01
Maintenance and servicing
10.2 Installing and removing hardware components
10-21
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