Product specifications
Chapter 3 Installing HA-680 driver
HA-680_V04
- 57 -
◆ Grounding motor frame
When actuators are grounded at driven machine through the motor frame, current flows through floating
capacity (Cf) of the motor from power amplifier of the driver. To avoid influence of the current, always
connect the ground terminal (motor frame) of the motor to the ground terminal of the driver, and connect
the ground terminal of the driver to the ground directly.
◆ Grounding ducts
When the motor cables are housed in a metal conduit or a metal box, ground their metal parts. The
ground should be connected to earth at a single point.
3-4-2 Installing noise filters
Noise filters are recommended to guard against incorrect motion caused by impulse noise that may be
emitted from power line and to suppress noise emissions to the line from inside of the driver.
When plural drivers are used, install noise filters for each driver.
Select bi-directional noise filters that can suppress external and internal noise.
Recommended noise filters are listed in the figure below:
driver
Model Manufacturer
All models SUP-P8H-EPR-4 Okaya electric.
Install the noise filters and the HA-680 driver as near as possible with one another.
Install the noise filters to the lines of the electric devices other than the HA-680 driver in the same way.
Always install the noise filters to the source of high frequency noise, such as electric welders and
electrical discharge machines.
Incorrect use of noise filters can seriously reduce its effectiveness. Inspect them with the following
instructions:
◆ Separate the filtered side
and the unfiltered side of the
power supply cables from each
other. Do not bundle both
together. Do not encase them
within the same duct.
◆ Do not bundle the grounding
cable with the filtered side of
power cables or signal wires.
Do not encase them within the
same duct.
◆ Avoid daisy-chain wiring of
ground cables. Ground them to
a frame box or ground plate at
a single point
Filter
Filter
Ground in Bo
x
Ground in Bo
x
BAD
GOOD
Grounding wires
near power lines is
acce
p
table.
(b)
Filter
Filter
Ground in Bo
x
Ground in Bo
x
BAD
GOOD
E E
Wire Shield
E E
(c)
Wire Shield
Filter
Ground in
Filter
Ground in Box
Ground in Bo
x
BAD
GOOD
(a)