Siemens SIMATIC S7-300 Module data - Directive on Handling Electrostatic-Sensitive Devices (ESD; Definition of ESD

S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
E-1
E Directive on handling Electrostatic-Sensitive Devices (ESD)
E
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 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.
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.