Siemens SIMATIC Rack PC 547B, Руководство по эксплуатации, Страница: 55 / 136

SIMATIC Rack PC 547B
Operating Instructions, 12/2007, A5E01127519-02
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Expansions and configuration
10
10.1 Opening the device
CAUTION
Work on the open device may only be carried out by authorized and qualified personnel.
The device must always be kept closed, otherwise device safety cannot be ensured.
CAUTION
The device contains electronic components which may be destroyed by electrostatic
charge.
You therefore need to take precautionary measures before you open the device. Refer to
the (ESD) guidelines for handling electrostatic sensitive devices.
Tools
All mechanical installation tasks on the device can be carried out with Torx T10 screwdrivers.
Preparation
Disconnect the device from the mains.
Liability disclaimer
All specifications and approvals apply only to expansion units which are released by
SIEMENS.
No liability can be accepted for impairment of functions caused by the use of third-party
devices or components.
Observe the installation instructions for the components. UL approval of the device only
applies when the UL-approved components are used according to their "Conditions of
Acceptability".