A3-37
IM 34M06C11-01E
A3.9.1
EMC Directive
(1) Requirements of EMC Directive
The EMC directive applies to equipment that may emit electromagnetic disturbances or
equipment that may be damaged by electromagnetic disturbances.
The EMC directive requires that the electromagnetic disturbances emitted by equipment
to not exceed a tolerable level, and that equipment maintains a minimum level of
immunity to electromagnetic disturbances. This section summarizes the considerations
to ensure that the FA-M3 conforms to the EMC directive. However, the installation
manufacturer needs to test and confirm the conformity to the EMC directive of the
finished product incorporating the FA-M3.
(2) Applicable Standards of the EMC Directive
The standards applicable to the FA-M3 are given in tables A3.1 and A3.2
Modules declaring conformity to the CE Mark satisfy the specified values and
performance criteria displayed in the tables. For details on modules conforming to the
CE Marking, see Appendix A2, “Approved/Compliant modules.”
From the safety viewpoint of the Low Voltage directive, it is necessary to install and use
the equipment within a panel enclosure. The EMC directive conformance test is
conducted with the equipment installed in a general panel enclosure. The panel
enclosure used during the test has an emissive noise attenuation characteristic of 15dB
average and 25dB maximum (from 30 to 1000MHz).
Table A3.1 Applicable Standards of EMC Directive (Emission)
Applicable
Standard
Test Name/
Reference Standards
Test
Description
*3
Specified Value
Emiss
ion
EN 61326-1
EN 61326-2-3
*1
EN55011
Class A Group1
Emissive electromagnetic
noise
Measures the electric
wave disturbance
which the equipment
emits to the external
space
30 to 230MHz:
40dB
V/m (QP
*2
,10m method)
230 to 1000MHz:
47dB
V/m (QP,10m method)
CISPR 16-1
CISPR 16-2
CISPR 11
Power supply terminal Noise
Measures the noise
level which the
equipment emits to a
power supply line.
0.15 to 0.5MHz:
79dB
V (QP),66dB
V (AV
*2
)
0.5 to 30MHz:
73dB
V (QP),60dB
V (AV)
CISPR 16-1
CISPR 16-2
CISPR 11
EN61000-3-2
Power supply harmonic
Measures the size of
the harmonic current
generated by the
power supply of the
equipment.
Class A Equipment:
Even
2
nd
harmonic current: 1.08A or less
4
th
harmonic current: 0.43A or less
6
th
harmonic current: 0.30A or less
:
Odd
3
rd
harmonic current: 2.30A or less
5
th
harmonic current: 1.14A or less
7
th
harmonic current: 0.77A or less
:
Values specified for up to the 40
th
harmonic current
(description omitted here)
The FA-M3 belongs to category A but its input is
below 75W and hence it lies outside the applicable
scope of the standard.
EN61000-3-2
EN61000-3-3
Flicker
Measures the voltage
fluctuation in the
power supply system
due to fluctuations in
the current consumed
by the equipment.
Short flicker index: Pst < 1
Long flicker index: Plt < 0.65
Relative steady voltage fluctuation: dc < 3.3%
Maximum relative voltage fluctuation: dmax < 4%
Voltage fluctuation time: time where voltage
fluctuations exceeds 3.3% should be less than
500ms
EN61000-3-3
*1:
EN61326-2-3 is applicable only to F3CU04-
□□
.
*2:
QP : Quasi-Peak
AV: Average value
*3:
USB port on the CPU module is excluded from the EMC test since it is intended for maintenance purposes and not
used in actual operation.
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