Siemens SIMATIC PANEL PC 877 - Manual (Page 118)

Maintenance and service
12.3 Separating the control unit from the computer unit
SIMATIC Panel PC 877
12-4
Operating instructions, Release 07/2006, A5E00877780-01
12.3
12.3
Separating the control unit from the 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. Disconnect the device from mains.
2. Open the switchgear cabinet. The device is now accessible from the back.
3. To swing away the computer unit (1): Loosen the four knurled screws (2) which attach the
computer unit to the rear of the control unit (3).
Figure 12-1 Separating the control unit from the computer unit
4. Swing the computer unit (1) away. The connectors on the back of the control unit (3) are
now accessible.