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D.2
Electrostatic Charging of Persons
Charging
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
Guidelines for Handling Electrostatically Sensitive Devices (ESD)
Every person with a non-conductive connection to the electrical potential of
its surroundings can be electrostatically charged.
Figure D-1 shows you the maximum values for electrostatic voltages which
can build up on a person coming into contact with the materials indicated in
the figure. These values are in conformity with the specifications of
IEC 801-2.
Voltage in kV
(kV)
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
3
1
5 10 20 30 40 50 60 70 80 90 100
Figure D-1 Electrostatic Voltages which can Build up on a Person
1
Synthetic material
2 Wool
3 Antistatic material, such as
wood or concrete
1
2
Relative atmospheric
humidity in %
D-3
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