User manual

7 Installation
−27−
7.7 Installing and wiring in compliance with EMC Directive
Effective measures must be taken against the EMI that the motor and driver may give to adjacent
control-system equipment, as well as the EMS of the motor and driver itself, in order to prevent a serious
functional impediment in the machinery. The use of the following installation and wiring methods will enable
the driver to be compliant with the EMC directive.
EMI emitting noise changes according to the layout of the product or the wiring of the cables. If the noise
generated by the cable causes a problem, insert ferrite cores in the cable.
Refer to “Standards and CE Marking” on p.10 for the applicable standards.
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Connecting mains filter for power supply line
Connect a mains filter in the AC input line to prevent the noise generated in the driver from propagating
externally through the power supply line.
Use a mains filter or equivalent as below table.
Driver
model
Manufacturer
Single-phase
100-115 V
Single-phase
200-230 V
Three-phase
200-230 V
TDK Corporation ZRCS-2010-00S − −
NXD20-A
NXD20-C
TDK-Lambda Corporation − MC1210 MC1310
NXD75-S TDK-Lambda Corporation − − RTHN-5010
• Install the mains filter as close to the driver as possible.
• Use cable clamps and other means to secure the input and output cables firmly to the surface of the
enclosure.
• Connect the ground terminal of the mains filter to the grounding point, using as thick and short a wire as
possible.
• Do not place the AC input cable (AWG16 to 14: 1.25 to 2.0 mm
2
) parallel with the mains-filter output cable
(AWG16 to 14: 1.25 to 2.0 mm
2
). Parallel placement will reduce mains-filter effectiveness if the
enclosure’s internal noise is directly coupled to the power supply cable by means of stray capacitance.
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Connecting a surge arrester
Use a surge arrester as below table.
Manufacturer Single-phase 100-115 V, 200-230 V Three-phase 200-230 V
OKAYA ELECTRIC
INDUSTRIES CO., LTD.
R·C·M-601BQZ-4 R·C·M-601BUZ-4
Note
When measuring dielectric strength of the equipment, be sure to remove the surge
arrester, or the surge arrester may be damaged.
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Connecting the 24 VDC power supply
Use a 24 VDC power supply conforming to the EMC Directive.
Use a shielded cable for wiring, and wire/ground the power supply cable over the shortest possible distance.
Refer to “Wiring the power supply cable and signal cable” below for how to ground the shielded cable.
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How to ground
The cable used to ground the driver, motor and mains filter must be as thick and short as possible so that no
potential difference is generated. Choose a large, thick and uniformly conductive surface for the grounding
point.
How to ground the driver
Refer to p.45 for how to ground the driver.
How to ground the motor
Connect the protective earth lead of the cable for motor, to the protective earth terminal on the driver.