21
■
Grounding method
When grounding the driver and mains filter, use a cable of the largest possible size and connect to the
ground point over the shortest distance so that no potential difference will be generated at the grounded
position. The ground point must be a large, thick and uniform conductive surface.
Install the motor onto a grounded metal surface.
■
Wiring of the power supply and digital I /O cables
Use a shielded cable of AWG18 (0.75 mm
2
) or more in diameter for the driver signal cable, and keep it as
short as possible. Use shielded cable between AWG24 (0.2 mm
2
) and AWG22 (0.3 mm
2
) for the driver’s
digital I / O cables. Wire the digital I / O cables over the shortest possible distance.
When grounding a shielded cable, use a metal cable clamp that
contacts the shielded cable over the entire perimeter. Install the
cable clamp at the tip of the braided-screen cable and connect it to
an appropriate ground point.
■
Other wiring
●
When grounding the driver, connect the ground cable directly to the ground point so that a difference
will not be generated between the driver’s ground potential and the ground potential of the control
system equipment operating nearby.
●
When a relay or electromagnetic switch is used in the same circuit, use a mains filter or CR circuit to
absorb any possible surge.
●
Keep the cable lengths as short as possible. Do not wind or bundle extra lengths.
●
Separate the power cables such as motor cable and power supply cable from the signal cables, and
wire them apart by around 100 to 200 mm. If a power cable must cross over a signal cable, wire them
at right angles. Keep an appropriate distance between the AC input cable and output cable of the
mains filter.
■
Installing and wiring for EMC measurement
The installation / wiring conditions of the motor, driver and DC power source for the EMC measurement of
CSK
Series products are shown below:
Cable clamp
Shielded cable
Motor
Driver
FG
PE
FG
I/O cable (2m)
Mains
filter
DC power
supply
PE
Cable
clamp
Grounded panel
FG
Power cable (1.6m)
Motor cable (2m)
FG
Cable
clamp
(Shielded cable)
(Shielded cable)
Controller
FG
Cable
clamp