Siemens SIMATIC Panel PC 677 Operating Instructions Manual page 61

Figure 8-3
4. Swing the computer unit (1) away. The connectors on the back of the control unit (3) are
5. In order to dismount the computer unit, loosen cabels K1 to Kx and the USB cable
6. Two mounting rails, whose ends are in the form of lugs (4), are screwed to the control
7. Put the computer unit down carefully.
8. Where necessary, also remove the control unit depending on its design: Secure the
SIMATIC PC Panel PC 677/877, Control Unit
Operating Instructions, Edition 04/2005, A5E00407724-01
Separating the control unit from the computer unit
now accessible.
between the computer unit and the control unit.
unit. Lift the computer unit vertically out of these lugs.
control unit 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.
8.3 Separating the control unit from the computer unit
Maintenance and service
8-5