Siemens Simatic S7-300 Instrukcja Obsługi Pobierz pdf (Strona 20)

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General technical data

1.2 Electromagnetic compatibility

S7-300 Module data

20 Manual, 02/2013, A5E00105505-08

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 Test voltage corresponds with degree

of severity

Electrostatic discharge

to IEC 61000-4-2

Air discharge: ± 8 kV

Contact discharge ± 4 kV

Burst pulses (high-speed

transient disturbance)

to IEC 61000-4-4.

2 kV (power supply lines)

2 kV (signal lines > 3 m)

1 kV (signal lines < 3 m)

High-energy single pulse (surge) to IEC 61000-4-5

External protective circuit required

(refer to

S7-300 Automation System, Hardware and Installation,

Chapter "Lightning and overvoltage protection")

• asymmetric coupling

2 kV (power supply lines)

DC with protective elements

2 kV (signal/ data line only > 3 m),

with protective elements as required

• symmetric coupling

1 kV (power supply lines) DC with

protective elements

1 kV (signal/ data line only > 3 m),

with protective elements as required

Additional measures

When connecting an S7-300 system to the public network, always ensure compliance with

Limit Value Class B to EN 55022.

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