Directive on handling electrostatic sensitive devices
(ESD)
D
D.1 ESD: What are the directives for handling electrostatic sensitive
devices?
Definition
All electronic modules are equipped with large-scale integrated ICs or components. Due to
their design, these electronic components are highly sensitive to overvoltage, and thus to any
electrostatic discharge.
These Electrostatic Sensitive Devices/Modules are commonly abbreviated ESD.
Electrostatic sensitive devices are labeled with the following symbol:
CAUTION
Electrostatic sensitive devices can be destroyed by voltages far below the level perceived by
human beings. These voltages are generated when you touch a component or electrical
connections of a module without having discharged your body. In most cases, the damage
caused by overvoltage is not evident immediately, and results in damage only after a
prolonged period of operation.
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 433
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