Separating The Control Unit From The Computer Unit - Siemens SIMATIC HMI IPC677C Operating Instructions Manual

11.6

Separating the control unit from the computer unit

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 the 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
4. Swing the computer unit (1) away. The connectors on the back of the control unit (3) are
5. Loosen cables and the USB cable between the computer unit and the control unit
6. Two mounting rails are screwed onto the computer unit whose angled clips (4) are
SIMATIC HMI IPC677C
Operating Instructions, 04/2013, A5E02722710-04
computer unit to the rear of the control unit (3).
Figure 11-1 Separating the control unit from the computer unit
now accessible.
located in the corresponding recesses in the computer unit. Lift the computer unit
vertically out of these recesses
11.6 Separating the control unit from the computer unit
Service and maintenance
119