Operating instructions

MP 377, MP 377 PRO (WinCC flexible)
Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
287
Appendix
A
A.1 ESD guideline
Definition of ESD
All electronic modules are equipped with large-scale integrated ICs or components. Due to
their design, these electronic elements are highly sensitive to overvoltage, and thus to
any electrostatic discharge. These electronic components are therefore specially
identified as ESDs.
Abbreviations
The following abbreviation is commonly used for electrostatic sensitive devices:
● EGB – Elektrostatisch Gefährdete Bauteile/Baugruppen (Germany)
● ESD – Electrostatic Sensitive Device (internationally recognized term)
Labeling
ESDs are labeled with the following symbol:
Electrostatic charging
CAUTION
Electrostatic charging
ESDs may be destroyed by voltages far below the level perceived by human beings.
Voltages of this kind develop when a component or an assembly is touched by a person
who is not grounded against static electricity. Usually, it is unlikely that damage to an ESD
as a result of overvoltage is detected immediately but may become apparent only after a
longer period of operation.
Prevent electrostatic charging of your body before you touch the ESD!