User`s manual

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MELSEC
2 EMC COMMAND
2
2 EMC COMMAND
2.1 Requirements for EMC Command Compliance
EMC commands, which are among the European command sets, are now enforced.
The EMC commands regulate "emission (electromagnetic interference)," which
requires that a device not emit strong electromagnetic waves externally, and "immunity
(electromagnetic sensitivity)," which requires that a device have the ability to resist
external electromagnetic waves.
The precautionary items when configuring a machine device using an CC-Link board
to conform to EMC commands are described in sections 2.1.1 through 2.1.4.
Although we tried very hard to document these materials according to the
requirements for regulation and the standards we have researched, the compatibility to
the above commands of the entire device created according to the contents of this
material, is not guaranteed. The methods to enable a device to conform to the
commands and the compatibility must be determined by the manufacturer who
produces the machine device.
2.1.1 EMC commands
The standards relating to EMC commands are listed in the table below:
With all test items, the standard has been tested with each device installed in an IBM
PC/AT compatible PC bearing a CE certification logo.
Specification Test item Test description Standard values
EN55011
Radiated noise
Measure the electric wave
released by the product.
30 M-230 MHz QP : 50 dB
µ
V/m
(3 m measurement)
1
230 M-1000 MHz QP : 57 dB
µ
V/m
(3 m measurement)
EN50081-2 :
1995
EN55011
Conduction noise
Measure the noise released by
the product to the power line.
150 k-500 kHz QP: 79 dB, Mean: 66 dB
1
500 k-30 MHz QP: 73 dB, Mean: 60 dB
IEC801-2
Static electricity immunity
Immunity test by applying static
electricity to the unit enclosure.
4 kV contact discharge
8 kV air discharge
IEC801-3
Radiated electromagnetic field
Immunity test by radiating an
electric field to the product.
10 V/m, 27 - 500 MHz
prEN50052-2 :
1991
IEC801-4
First transient burst noise
Immunity test by applying burst
noise to the power line and
signal line.
2 kV
EN61000-4-2
Static electricity immunity
Immunity test by applying static
electricity to the unit enclosure.
4 kV contact discharge
8 kV air discharge
EN61000-4-4
First transient burst noise
Immunity test by applying burst
noise to the power line and
signal line.
2 kV
ENV50140
Radiated electromagnetic field
AM modulation
Immunity test by radiating an
electric field to the product.
10 V/m, 80-1000 MHz, 80 % AM
modulation@1 kHz
ENV50204
Radiated electromagnetic field
Pulse modulation
Immunity test by radiating an
electric field to the product.
10 V/m, 900 MHz, 200 Hz pulse
modulation, 50 % duty
EN50082-2 :
1995
ENV50141
Conduction noise
Immunity test by inducting
electromagnetic field to the
power line and signal line.
10 Vrms, 0.15-80 MHz, 80 % AM
modulation@1 kHz
1 QP (Quasi-Peak) : Quasi-peak value, Mean: Average value