Siemens S7-400PLC Spécifications Page 448

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Directive on handling electrostatic sensitive devices (ESD)
D.2 Electrostatic charging of persons
S7-400 Automation System Module Data
448 Reference Manual, Edition 09/2009, A5E00850736-06
D.2 Electrostatic charging of persons
Electrostatic charging
Any person with a non-conductive connection to the electrical potential of its surroundings
may be exposed to electrostatic charge.
The figure shows the maximum electrostatic voltage which may build up on a person coming
into contact with the materials indicated. These values are in conformity with the
specifications of IEC 61000-4-2.
1
2
3
4
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
(kV)
51020 3040 506070 8090100
(1) Voltage in kV
(2) Synthetic material
(3) Wool
(4) Antistatic materials, such as wood or concrete
(5) Relative air humidity in %
Figure D-1 Electrostatic voltages which can build up on a person
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