Appendix
A.2 Certificates, approvals & guidelines
SIMATIC MV500
278 Operating Instructions, 03/2021, C79000-G8976-C494-05
A.2.2 ESD Guidelines
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.
The "electrostatic sensitive components/modules" are commonly referred to as "ESD". "ESD" is
the international abbreviation for "electrostatic sensitive devices".
Electrostatic sensitive modules are identified by the following
symbol:
ESD devices can be destroyed by voltages well below the threshold of human perception.
Such voltages occur if you touch a component or electrical connectors of a module without
first discharging the static from your body. The electrostatic discharge current may lead to
latent failure of a module, that is, this damage may not be significant immediately, but in
operation may cause malfunction.
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