Directive On Handling Electrostatic-Sensitive Devices (Esd; Definition Of Esd - Siemens SIMATIC S7-300 Manual

Directive on handling Electrostatic-Sensitive Devices (ESD)

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Introduction
In this appendix, we explain
● the meaning of "electrostatic-sensitive devices"
● the precautions you must take when handling and working with electrostatic sensitive
E.1

Definition of ESD

E.1
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.
Electrostatic sensitive devices are labeled with the following symbol:
Caution
Electrostatic sensitive devices may 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.
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
modules.
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