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11 EMC AND LOW VOLTAGE DIRECTIVE
MELSEC-ST
11.1.1 EMC Directive standards
The EMC Directive standards are listed below.
Specification
Test item
Test details
Standard value
EN55011
Radiated emissions *
2
Radio emissions from the product
are measured.
30 to 230 MHz QP: 40 dB V/m
(10 m in measurement range) *
1
230 to 1000 MHz QP: 47 dB V/m
(10 m in measurement range)
EN55011
Conducted emission
Noise emissions from the product
to the power line is measured.
150 to 500 kHz QP: 79 dB, Mean: 66 dB *
1
500 to 30 MHz QP: 73 dB, Mean: 60 dB
EN61000-4-2
Electrostatic immunity *
2
Immunity test in which static
electricity is applied to the
equipment.
8 k V Aerial discharge
4 k V Contact discharge
EN61000-4-3
Radiated electromagnetic field
immunity *
2
Immunity test in which field is
irradiated to the product.
1.4 to 2.0 GHz, 80 to 1000 MHz, 10 V/m, 80%
AM modulation @ 1 kHz
EN61000-4-4
Fast transient burst immunity *
2
*
3
Immunity test in which burst noise
is applied to the power and signal
lines.
AC power line: Common mode 2 kV
I/O, analog, communication (shielded):
Common mode 1 kV
EN61000-4-5
Surge immunity *
3
Immunity test in which a lightning
surges are applied to power and
signal lines.
AC power line: Common mode 2 kV,
differential mode 1 kV
I/O, analog, communication (shielded):
Common mode 1 kV
EN61131-2 :
2003
EN61000-4-6
Conducted immunity *
3
Immunity test in which high-
frequency noise is applied to power
and signal lines.
0.15 to 80 MHz, 80% AM modulation @1 kHz,
3 Vrms
1: QP: Quasi-peak value, Mean : Average value
2: The MELSEC-ST series is an open type device (device incorporated in another device) and must be installed in a conductive control
panel.
The corresponding test is performed while the MELSEC-ST series is installed inside a control panel.
3: Use an external power supply introduced in Section 11.1.4. Mount the external power supply and MELSEC-ST series modules to the
same DIN rail.
Wiring connected between the following modules is treated as internal wiring and it is tested as an integrated system.
Between external SYS. power supply and bus refreshing module (ST1PSD)
Between external AUX. power supply and bus refreshing module (ST1PSD)
Between external AUX. power supply and power feeding module (ST1PDD)
11
Summary of Contents for MELESEC-ST
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