Siemens SIMATIC ET 200AL, System Manual

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Technical specifications
10.2 Electromagnetic compatibility
Distributed I/O system
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System Manual, 08/2021, A5E31861578-AJ
10.2 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 10- 3 Pulse-shaped disturbance variables
Pulse-shaped disturbance variable Tested with Corresponds to
degree of severity
Electrostatic discharge according to
IEC 61000-4-2.
Air discharge: ±8 kV 3
Contact discharge: ±4 kV 2
Burst pulses (rapid transient disturb-
ance values) according to IEC 61000-
4-4.
±2 kV (power supply cable) 3
±2 kV (PROFIBUS-/PROFINET line) 4
±1 kV (signal line <30 m) 3
±1 kV (ET-Connection) 3
High-energy surge according to IEC 61000-4-5.
•
Asymmetrical coupling
±2 kV (24 V DC supply cable)
with protective element
3
±0.5 kV (24 V DC supply cable)
without protective element
1
±2 kV (PROFIBUS/PROFINET line)
without protective element
3
• Symmetrical coupling
±1 kV (24 V DC supply cable)
with protective element
3
±0.5 kV (24 V DC supply cable)
without protective element
2