Siemens SIMATIC PC BI10 Technical Description page 14

Before Opening
Before opening the unit, you should carefully read the following rules:
the Unit
Tools Use a suitable crosstip or TORX screwdriver to remove or install
components.
SIMATIC PC BI10/FI10/FI15, Technical Description
C79000-G7076-C773-03
Before you disconnect the power supply cable, discharge any electrostatic
charge on your body; for example, by touching screws on the rear panel
of the PC.
Discharge any electrostatic charge from tools that you are using.
Wear a grounding wrist strap if you are handling components.
Leave components and modules in their packing until you are ready to
install them.
Disconnect the PC from its power supply before plugging in or removing
any modules or components.
Touch components and modules only on their edges. Above all, do not
touch the connecting pins or printed conductors.
Do not operate the PC with the cover open.
System Unit
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