Operating instructions

Maintenance and service
12.4 Removing and installing hardware components
SIMATIC Panel PC 677B
104 Operating Instructions, 05/2007, A5E01035609-01
12.4.2 Opening the Device
Caution
Work on the open device may only be carried out by authorized and qualified personnel.
Within the warranty time, you are only allowed to install expansions for memory and
expansion card modules.
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 directives on handling components which are sensitive to electrostatic charge.
Disclaimer of liability
All specifications and approvals apply only to expansion units which are released by
SIEMENS.
Siemens disclaims any liability 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".