Connection
2 Har
28
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Prevention of noise propagation
•
Connect a noise filter on the input side of the DC power supply.
•
Place the power lines, such as the motor and power supply cables, keeping a distance of 200 mm (7.87 in.) or more
from the signal lines, and also do not bundle them or wire them in parallel. If a power cable and a signal cable have
to cross, cross them at a right angle.
•
Use shielded twisted pair cables for power lines and signal lines.
•
Keep cables as short as possible without coiling and bundling extra lengths.
•
Grounding multiple points will increase effect to block electrical noise because impedance on the grounding
points is decreased. However, ground them so that a potential difference does not occur among the grounding
points.
•
To ground a shielded cable, use a metal cable clamp that can
maintain contact with the entire circumference of the shielded
cable, and ground as near the product as possible.
Cable clamp
Shielded cable
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Suppression of effect by noise propagation
•
Loop the noise propagated cable around a ferrite core. Doing so will prevent the propagated noise invades into
the driver or emits from the driver. The frequency band in which an effect by the ferrite core can be seen is
generally 1 MHz or more. Check the frequency characteristics of the ferrite core used. When increasing the effect of
noise attenuation by the ferrite core, loop the cable a lot.
4-7
Conformity to EMC
Effective measures must be taken against EMI that the motor and driver may give to adjacent control-system
equipment, as well as 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 motor and driver to be compliant
with EMC.
Oriental Motor conducts EMC testing on its motors and drivers in accordance with “Example of installation and wiring”
on p.29. The user is responsible for ensuring the machine’s compliance with EMC, based on the installation and
wiring explained below.
This equipment is not intended for use in residential environments nor for use on a
low-voltage public network supplied in residential premises, and it may not provide
adequate protection to radio reception interference in such environments.
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Connecting the main power supply and the control power supply
Use DC power supplies compliant with EMC for the main power supply and the control power supply. Use shielded
cables to wire and ground as short as possible. Refer to "Prevention of noise propagation” for how to ground the
shielded cable.
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Ferrite core
Install the following ferrite core (or equivalent) to the places shown in “Example of installation and wiring” on p.29.
Part No.: ZCAT3035-1330 (TDK Corporation)
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Connecting the motor cable
Use an Oriental Motor connection cable when extending the wiring distance between the motor and the driver. Refer
to p.34 for the model name.
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Connecting the signal cable
Refer to “Prevention of noise propagation."
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How to ground
•
Wires used to ground the motor must be as thick and short as possible so that no potential difference is generated
between the grounding points.
•
Choose a large, thick and uniformly conductive surface for the grounding point.
•
Make sure to ground the Protective Earth Terminal of the motor.
Summary of Contents for A Step AZ Series
Page 14: ...1 Introduction 14 ...
Page 64: ...3 Implicit communication 64 ...
