Operating instructions

Appendix
A.1 ESD guideline
MP 377, MP 377 PRO (WinCC flexible)
288 Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
Anyone who is not connected to the electrical potential of their surroundings is subjected to
electrostatic charging.
The following figure indicates the maximum electrostatic charge anyone is subjected to when
coming into contact with the materials shown. These values correspond with specifications
to IEC 801-2.
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① Synthetic materials
② Wool
③ Antistatic materials such as wood or concrete
Protective measures against electrostatic discharge
CAUTION
Observe grounding measures
When working with electrostatic sensitive devices, make sure that the person,
the workplace and the packaging are properly grounded. This helps to avoid
electrostatic charging.
As a rule, only touch the ESD if this is unavoidable, for example for maintenance. When you
touch modules, make sure that you do not touch the pins on the modules or the PCB tracks.
In this way, the discharged energy can not affect the sensitive devices.
Discharge electrostatic electricity from your body if you are performing measurements on an
ESD. Do so by touching grounded metallic parts.
Always use grounded measuring instruments.