TM15 / TM17 High Feature Operating Manual
Commissioning Manual, 05/2009
91
ESD guidelines
B
B.1 ESD definition
What does ESD stand for?
All electronic modules are equipped with large-scale integrated ICs or components. Because
of the technology used, these electronic components are very sensitive to overvoltages and
thus to electrostatic discharge.
These Electrostatic Sensitive Devices/Modules are commonly abbreviated ESD. The ESD
designation is used internationally to refer to electrostatic sensitive devices.
Electrostatic sensitive devices are identified by the following symbol:
Figure B-1 Symbol for identification of electrostatic sensitive devices
CAUTION
Electrostatic sensitive devices can be irreparably damaged by voltages that are far lower
than anything a person can perceive. Voltages of this kind occur as soon as a component
or an assembly is touched by a person who is not grounded against static electricity. Any
damage that occurs to a module as a result of overvoltage is generally not recognized
immediately and only comes to light after the equipment has been operating for some time.
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