Electromagnetic Compatibility - Siemens simatic ET 200SP User Manual

10.2

Electromagnetic compatibility

Definition
Electromagnetic compatibility (EMC) is the ability of an electrical installation to function
satisfactorily in its electromagnetic environment without interfering with that environment.
Among other things, the CPU 1515SP PC also meets the requirements of the EMC
legislation for the European single market. The prerequisite for this is that the
CPU 1515SP PC complies with the requirements and guidelines relating to electrical
configuration.
EMC according to NE 21
The CPU 1515SP PC meets the EMC specifications of the NAMUR guideline NE 21.
Pulse-shaped disturbance
The following table shows the electromagnetic compatibility of the CPU 1515SP PC with
regard to pulse-shaped disturbances.
Table 10- 2
Pulse-shaped disturbance
Electrostatic discharge according
to IEC 61000-4-2.
Burst pulses (high-speed transient
disturbance) according to
IEC 61000-4-4.
High-energy single pulse (surge) according to IEC 61000-4-5
External protective circuit required (see function manual
Designing interference-free controllers
(http://support.automation.siemens.com/WW/view/en/59193566))
•
•
CPU 1515SP PC
Manual, 12/2014, A5E32701806-AA
Pulse-shaped disturbance
asymmetric coupling
symmetric coupling
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 supply cable)
DC with protective elements
2 kV (signal cable/data cable only > 30 m),
possibly with protective elements
1 kV (power supply cables) DC with protective
elements
1 kV (signal cable/data cable only > 30 m),
possibly with protective elements
Technical data
10.2 Electromagnetic compatibility
corresponds to
degree of se-
verity
3
3
3
3
3
87