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7.2
Directives and declarations
7.2.1
Electromagnetic compatibility
The HMI device satisfies, among other things, the requirements of the EMC guidelines of the
European domestic market.
EMC-compliant installation
The EMC-compliant installation of the connection box and the application of interference-
proof cables is the basis for interference-free operation. The following descriptions also apply
to installation of the connection box:
● Description "Directives for interference-free installation of PLCs"
(http://support.automation.siemens.com/WW/view/de/1064706)
● SIMATIC PROFINET system description
(http://support.automation.siemens.com/WW/view/en/19292127)
Pulse-shaped interference
The following table shows the electromagnetic compatibility of modules with regard to pulse-
shaped interference. This requires the HMI device to meet the specifications and directives
for electrical installation.
Pulse-shaped interference
Electrostatic discharge
in accordance with
IEC 61000-4-2
Bursts
(high-speed transient
interference)
in accordance with
IEC 61000-4-4
High-power surge pulses in accordance with IEC 61000-4-5, external protective circuit required
((refer to controller S7-300, Installation, section "Lightning and surge voltage protection")
Asymmetrical coupling
Symmetrical coupling
Mobile Client900WXN
Operating Instructions, 04/2015, A5E35883103-AB
Test voltage
Air discharge: 8 kV
Contact discharge: 6 kV
2 kV power supply cable
2 kV signal cable, > 30 m
1 kV signal cable, < 30 m
2 kV power cable
DC voltage with protective elements
2 kV signal/data cable, > 30 m,
with protective elements as required
1 kV power cable
DC voltage with protective elements
1 kV signal cable, > 30 m,
with protective elements as required
Technical specifications
7.2 Directives and declarations
Degree of severity
3
3
3
3
71
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