Safety instructions and approvals
2.5 Electro-Magnetic Compatibility
MP 377 15" Touch daylight readable (WinCC flexible)
22
Operating Instructions (Compact), 04/2009, A5E02532357-01
Approved HMI device
The HMI devices with approval for operation in potentially explosive atmospheres are listed
at the following Internet address:
"
http://support.automation.siemens.com/WW/view/en/291285
"
2.5
Electro-Magnetic Compatibility
Introduction
The HMI device fulfils, among other things, the requirements of the EMC laws pertaining to
the European domestic market.
EMC-compliant Mounting of the HMI Device
EMC-compliant mounting of the HMI device and the use of interference-proof cables will
ensure 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 table below shows the electromagnetic compatibility of modules in relation to pulse-
shaped interference. This requires the HMI device to meet the specifications and directives
for electrical installation.
Pulse-shaped
interference
Tested with
Corresponds to
severity
Electrostatic discharge
in accordance with
IEC 61000-4-2
Air discharge: 8 kV
Contact discharge: 6 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
the manual, Programmable Controller S7-300, 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
