Mitsubishi Electric QS001CPU User Manual page 69

9
EMC, LOW VOLTAGE, AND MACHINERY DIRECTIVES
(2) Noise filter (power supply line filter)
A noise filter is a component which has an effect on conducted noise.
It is not required to fit the noise filter to the power supply line, but fitting it can further
suppress noise.
(The noise filter has the effect of reducing conducted noise of 10 MHz or less.)
The precautions required when installing a noise filter are described below.
The noise will be induced when the
input and output wires are bundled.
Remark
Noise Filter Model Name
Manufacturer
Rated current
Rated voltage
(3) DC surge protective devices
DC surge protective device (SPD) is a device designed to protect electrical devices
from lightning surges on the DC power line. Connect a DC SPD to the module power
supply terminal of a CC-Link Safety remote I/O module. Use the one having
characteristics comparable to the MDP-D24 made by M-System Co., Ltd.
Remark
• Do not bundle the wires on the input side and output side of the noise filter. When
bundled, the output side noise will be induced into the input side wires from which
the noise was filtered.
Input side
(power supply side)
Filter
Output side
(device side)
Figure 9.11 Precautions on noise filter
• Earth the noise filter earthing terminal to the control cabinet with the shortest wire
possible (approx. 10 cm).
Table9.3 Noise filer specifications
• Before using a DC SPD, check the specifications and precautions in the manual.
• An MDP-D24 cannot be connected to the external power supply terminal of a
CC-Link Safety remote I/O module.
9.1 Requirements for Conformance to EMC Directive
Input side
(power supply side)
Induction
Filter
Separate and lay the input
and output wires.
FN343-3/01 FN660-6/06
SCHAFFNER SCHAFFNER
3A
250V
Output side
(device side)
ZHC2203-11
TDK
6A 3A
9
9.1.5 Others
9
10
11
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