Maintenance
4.2.2Panel PC 870
Removing the | Proceed as follows: |
computing unit |
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Knurled
1.Disconnect the power supply.
2.Swing open the mounting panel to obtain access to the rear of the PC 870.
3.Loosen the four (retained) knurled screws which secure the compu- ting unit to the rear side of the operating unit (see also Figure 3±3).
4.Swing the computing unit away to the left, whereby the two left clips act as hinges and thus prevent an unintentional releasing of the computing unit.
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Operating unit
Clips acting as hinges
Fig. 4-3 Swinging the computing unit away from the operating unit (viewed from above)
5.Remove the cable connectors K1 and K2 of the operating unit (see Figure
6.Lift the computing unit off the hinges of the operating unit and place it down carefully.
If necessary, you can now remove the operating unit by loosening either the screws or, depending on the version, the six clamps which secure the operating unit to the mounting panel (see Figure
SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual | |
Edition 07/01 |
