Directive On Handling Electrostatic-Sensitive Devices (Esd); Definition Of Esd - Siemens SIMATIC Manual

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Directive on handling Electrostatic-Sensitive Devices
(ESD)
Introduction
In this appendix, we explain
● the meaning of "electrostatic-sensitive devices"
● the precautions you must take when handling and working with electrostatic sensitive
modules.
E.1

Definition of ESD

Definition
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 Electrostatic Sensitive Ddevices/Modules are commonly abbreviated ESD. The
common international designation ESD stands for Electrostatic Sensitive Device.
ESD modules are identified by the following symbol:
ESD devices can be destroyed by voltages well below the threshold of human perception.
These static voltages develop when you touch a component or electrical connection of a
device without having drained the static charges present on 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.
619
CAUTION
E
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ

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