5 Installation
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21
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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.
Manufacture Product
number
Tyco Electronics CORCOM
10ESK1
TDK Corporation
ZAG2210-11S
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Install the mains filter as close to the driver as possible, and use cable clamps and
other means to secure the input and output cables firmly to the surface of the
enclosure.
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Connect the ground terminal of the mains filter to the grounding point, using as
thick and short a wire as possible.
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Do not place the AC input cable (AWG18) parallel with the mains filter output
cable (AWG18). 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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How to ground
The cable used to ground the driver 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.
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Wiring the power supply cable and signal cable
Use a shielded cable of AWG18 or more in diameter for the driver power supply
cable, and keep it as short as possible. Use a shielded cable of AWG24 to AWG22 in
diameter for the driver signal cable, and keep it as short as possible.
To ground a shielded cable, use a metal clamp or
similar device that will maintain contact with the
entire circumference of the shielded cable. Attach a
cable clamp as close to the end of the cable as
possible, and connect it as shown in the figure.
Cable
clamp
Shielded
cable
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Notes about installation and wiring
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Connect the driver and other peripheral control equipment directly to the
grounding point so as to prevent a potential difference from developing between
grounds.
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When relays or electromagnetic switches are used together with the system, use
mains filters and CR circuits to suppress surges generated by them.
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Keep cables as short as possible without coiling and bundling extra lengths.
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Place the power cables such as the motor and power supply cables as far apart
[100 to 200 mm (3.93 to 7.87 in.)] as possible from the signal cables. If they have
to cross, cross them at a right angle. Place the AC input cable and output cable of
a mains filter separately from each other.
