Siemens SIMATIC PC 670, Equipment Manual

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ESD Guidelines
Release 04/02
B-3
Panel PC 670 Computing Unit, Equipment Manual
B.2 Electrostatic Charge of People
Charging
Anyone who is not conductively connected to the electrical potential of their
surroundings can be electrostatically charged.
The maximum electrostatic voltage values which an operator can be charged with
when contacting the materials stated in the illustration are shown in Fig. B-1.
These values correspond to the specifications of IEC 801-2.
Voltage in kV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
(kV)
5 10 20 30 40 50 60 70 80 90 100
rel. humidity in %
1
3
1 synthetic material
2
wool
3
antistatic material, e.g.
wood or concrete
2
Figure B-1 Electrostatic voltages which an operator can be charged with