Siemens SIMATIC HMI Mobile Panel 277 RO - Electromagnetic Compatibility

Safety instructions and general notes
2.9 Electromagnetic compatibility
Mobile Panel 277 RO
Operating Instructions, 10/2015, A5E36824256-AA
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2.9
Electromagnetic compatibility
Introduction
The HMI device satisfies, among other things, the requirements of the EMC laws pertaining
to the European domestic market.
EMC-compliant installation
The EMC-compliant installation of the connection box and the application of interference-
proof cable is the basis for interference-free operation. The "Guidelines for interference-free
installation of PLCs" description and the "PROFIBUS Networks" manual also apply to the
installation of connection boxes.
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
Test voltage
Degree of severity
Electrostatic discharge
in accordance with IEC 61000-4-2
Air discharge: 8 kV
Contact discharge: 6 kV
3
Bursts
(high-speed transient interference)
in accordance with IEC 61000-4-4
2 kV power supply cable
2 kV signal cable, > 30 m
1 kV signal cable, < 30 m
3
High-power surge pulses in accordance with IEC 61000-4-5, external protective circuit required
(refer to controller S7-300, Installation, chapter "Lightning and surge voltage protection")
• Asymmetrical coupling
2 kV power cable
DC voltage with protective elements
2 kV signal/data cable, > 30 m,
with protective elements as required
3
• Symmetrical coupling
1 kV power cable
DC voltage with protective elements
1 KV signal cable, > 30 m,
with protective elements as required
3