Electromagnetic Compatibility - Siemens SIMATIC Manual

1.2

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.
The S7-300 modules also satisfy requirements of EMC legislation for the European domestic
market. Compliance of the S7-300 system with specifications and directives on electric
design is prerequisite.
Pulseshaped disturbance
The table below shows the EMC compatibility of S7 modules in areas subject to pulse-
shaped disturbance.
Pulse-shaped disturbance
Electrostatic discharge
to IEC 61000-4-2
Burst pulses (high-speed transi-
ent disturbance)
to IEC 61000-4-4.
High-energy single pulse (surge) to IEC 61000-4-5
External protective circuit required
(refer to
"Lightning and overvoltage protection")
•
•
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
S7-300 Automation System, Hardware and Installation,
asymmetric coupling
symmetric coupling
Test voltage
Air discharge: ±8 kV
Contact discharge ± 4 kV
2 kV (power supply lines)
2 kV (signal lines > 3 m)
1 kV (signal lines < 3 m)
2 kV (power supply lines)
DC with protective elements
2 kV (signal/ data line only > 3 m),
with protective elements as required
1 kV (power supply lines) DC with
protective elements
1 kV (signal/ data line only > 3 m),
with protective elements as required
General technical data
1.2 Electromagnetic compatibility
corresponds with degree
of severity
3
2
3
3
Chapter
3
19