Siemens SIMATIC ET 200AL System Manual page 135

13.4 Electromagnetic compatibility
Definition
Electromagnetic compatibility is the ability of an electrical apparatus to function in a
satisfactory manner in its electromagnetic environment without affecting this environment.
An I/O device of the ET 200AL distributed I/O system fulfills the requirements of the EMC law
of the European Union. The requirement for this is that an I/O device of the ET 200AL
distributed I/O system meets the specifications and guidelines for electrical configuration.
Pulse-shaped disturbance variables
The table below shows the electromagnetic compatibility of the distributed I/O systems
compared to pulse-shaped disturbance variables.
Table 13-3 Pulse-shaped disturbance variables
Pulse-shaped disturbance variable
Electrostatic discharge according to
IEC 61000-4-2.
Burst pulses (fast transient disturbance
variables) according to IEC 61000-4-4.
High-energy single pulse (surge) to IEC 61000-4-5
Signal line < 30 m and only installation within buildings
• Asymmetric coupling (phase-
ground)
• Symmetric coupling (phase-phase)
1
The maximum short-term influencing of analog devices during the duration of the EMC tests can
amount to ±10 % of the full-scale value.
2
Analog value deviation beyond the limits of the nominal range and diagnostics possible.
3 If greater phase to ground or phase to phase values are required, you will need an additional external
protective circuit (see function manual Designing interference-free controllers
(https://support.industry.siemens.com/cs/ww/en/view/59193566)).
Distributed I/O system
System Manual, 12/2023, A5E31861578-AL
1
3
Tested with
Air discharge: ±8 kV
Contact discharge: ±4 kV
±2 kV (power supply cable)
1
±2 kV (PROFIBUS/PROFINET/MultiFieldbus
line)
±1 kV (signal line <30 m)
±1 kV (ET-Connection)
2
±1 kV (24 V DC supply cable)
without protective element
±2 kV (PROFIBUS/PROFINET/MultiFieldbus
line)
3
±0.5 kV (24 V DC supply cable)
without protective element
Technical specifications
13.4 Electromagnetic compatibility
Conforms to
degree of sever­
ity
3
2
3
4
3
3
2
3
2
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