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6.3
Electromagnetic Compatibility
Introduction
This chapter presents information about immunity to interference of fail-safe modules and
about EMC conformity.
Definition of EMC
Electromagnetic compatibility is the ability of an electrical device to function in its
electromagnetic environment in a satisfactory manner without affecting this environment.
Fail-safe modules also comply with the requirements of the EMC law for the European
Single Market. As a requirement, the ET 200S distributed I/O system must comply with the
specifications and guidelines for electrical configuration.
Pulse-Shaped Interference
The following table presents the electromagnetic compatibility of fail-safe modules with
regard to pulse-shaped interference.
Pulse-Shaped Interference
Electrostatic discharge in
accordance with IEC 61000-4-2
(DIN VDE 0843 Part 2)
Burst pulse (rapid transient
interference) in accordance with
IEC 61000-4-4
(DIN VDE 0843 Part 4)
Zone B in accordance with IEC 61131-2
Surge in accordance with IEC 61000-4-5 (DIN VDE 0839 Part 10)
Degrees of severity 2 and 3 require an external protective circuit (see
paragraph below)
More stringent requirements to EN 298 regarding electromagnetic
interference for modules which conform to this standard.
Asymmetrical connection
Symmetrical connection
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
Tested With
8 kV
6 kV (cabinet installation mandatory)
4 kV (no cabinet installation)
2 kV (supply line)
2 kV (signal line)
1 kV (supply line)
1 kV (signal lead/data lead)
2 kV (supply line)
0.5 kV (supply line)
0.5 kV (signal lead/data lead)
1 kV (supply line)
1 kV (signal lead/data lead)
General Technical Specifications
6.3 Electromagnetic Compatibility
Degree of Severity
3 (air discharge)
3 (contact discharge)
3
4
2
3
2
3
53
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