Electromagnetic Compatibility - Siemens SIMATIC ET 200SP System Manual

14.2

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 ET 200SP distributed I/O system also meets the requirements of the
EMC legislation for the European single market. The prerequisite is that the ET 200SP
distributed I/O system complies with the requirements and guidelines relating to electrical
equipment.
EMC in accordance with NE21
The ET 200SP distributed I/O system meets the EMC specifications of the NAMUR
recommendation NE21.
Pulse-shaped disturbance variables
The table below shows the electromagnetic compatibility of the ET 200SP distributed I/O
system with regard to pulse-shaped disturbance variables.
Table 14- 2
Pulse-shaped disturbance variable Tested with
Electrostatic discharge in accord-
ance with IEC 61000-4-2
Burst pulses (fast transients) in
accordance with IEC 61000-4-4
High-energy single pulse (surge) in accordance with IEC 61000-4-5
External protective circuit required (see Function manual Designing interference-
free controllers (http://support.automation.siemens.com/WW/view/en/59193566))
•
•
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF
Pulse-shaped disturbance variables
Asymmetric coupling
Symmetric coupling
Air discharge: ± 8 kV
Contact discharge: ± 6 kV
±2 kV (power supply line)
±2 kV (signal line >30 m)
±1 kV (signal line <30 m)
±2 kV (power supply lines)
DC with protective elements
±2 kV (signal lines/data lines only >30 m) with
protective elements if necessary
±1 kV (power supply line) DC with protective
elements
±1 kV (signal line/data line only >30 m) with
protective elements if necessary
Technical specifications
14.2 Electromagnetic compatibility
Corresponds to
degree of se-
verity
3
3
3
3
3
235