Siemens Simatic PC Panel PC 870 Service Manual download pdf (Page 40)

Maintenance

4-2

SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual

Edition 07/02

4.2 Detaching the operating unit in standard mount form fac-

tor from the computing unit

It may at some stage become necessary to separate the operating unit

from the computing unit, e.g. to replace the operating unit.

4.2.1 Panel PC 670

To swing the computing unit away from the operating unit, proceed as fol-

lows:

1. Undo the knurled screws which secure the computing unit to the rear

side of the operating unit.

2. 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:

Mounting rail

Computing unit swung away by 90°

Computing unit

Clips

Mounting rail

Compu-

ting unit

Opera-

ting unit

Fig. 4-1 Swinging the computing unit away from the operating unit (viewed from above)

You can now access the connections on the rear panel of the operating

unit.

Swinging open the

computing unit

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Siemens Simatic PC Panel PC 870 Service Manual Page 40