Safety instructions and general notes
2.4 Electromagnetic compatibility
OP 73micro, TP 177micro (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
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2.4 Electromagnetic compatibility
Introduction
The HMI device fulfills requirements of the EMC Directive of the domestic European market
and other requirements.
EMC-compliant installation of HMI devices
An EMC-compliant installation of the HMI device and the use of interference-proof cables
form the basis of trouble-free operation. The "Directives for interference-free installation of
PLCs" and the "PROFIBUS Networks" manual also apply for the installation of the HMI
device.
Pulse-shaped interference
The following table shows the EMC properties of the modules with respect to pulse-shaped
interference. A requirement for this is that the HMI device meets the specifications and
directives regarding electrical installation.
Table 2-1 Pulse-shaped interference
Pulse-shaped
interference
Tested with Corresponds to test
intensity
Electrostatic discharge
conforming to
IEC 61000-4-2
Air discharge: 8 kV
Contact discharge: 4 kV
3
Burst pulses
(high-speed transient
interference)
conforming to
IEC 61000-4-4
2 KV power supply cable
2 KV signal cable, > 30 m
1 KV signal cable, < 30 m
3
High-power surge pulses conforming to IEC 61000-4-5, external protective circuit required (refer to
S7 300 PLC, Installation, chapter “Lightning and overvoltage protection”).
• Asymmetric coupling
2 kV power cable
DC voltage with protective elements
2 KV signal/data cable, > 30 m,
with protective elements as required
3
• Asymmetric coupling
1 kV power cable
DC voltage with protective elements
1 KV signal cable, > 30 m,
with protective elements as required
3
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