HarmonicDrive H A - 800A, Manual

Page: 55 / 314

2-4 Suppressing noise
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
Install the noise filters and this driver as close as possible with one another.

Also install noise filters to the power source cables of electric devices other than
this driver in the same manner.
In particular, always install noise filters to sources of high-frequency, such as
electric welders and electrical-discharge processing machines.

Incorrect use of noise filters can seriously reduce its effectiveness. Install noise
filters by referring to the cautionary information provided below.
•
Separate the filtered wires and
unfiltered wires from each other. Do
not place them in the same pipe or
duct, or bundle them together.
• Do not place the ground wire and
filtered wires in the same pipe or duct,
or bundle them together.
• Do not daisy-chain ground wires, but
connect one ground wire separately to
each device or to a single point on the
control cabinet or ground plate.

Be sure to install surge protector devices to coils of magnetic relays, magnetic
switches (contactors), solenoids, etc.

Do not open the end of analog input signal cables such as speed signal cables.

Since this driver is designed for industrial use, it incorporates no measures to
prevent radio interference.
If the driver is used in the following environments, connect line filters to the input
side of the power source cable:
• Used near houses
• Where radio interference may present problems
M
×
Grounding wires
near power lines is
acceptable.
○ ×
E
E
F
E
Shield wire
○
E
E
F
E
Shield wire
×
○
Grounding in a control cabinet
Filter
Filter
Filter
Filter
Grounding in a control cabinet
Grounding in a control cabinet Grounding in a control cabinet
Grounding in a control cabinet Grounding in a control cabinet
Filter
Filter