
B--65245EN/02
3. ACTION AGAINST NOISE
TROUBLESHOOTING AND
COUNTERMEASURES
145
The cab les used for the machine are classif ied as listed in the following table:
Process the cables in each group as described in the action column.
Group Signal lin e Action
Primary AC power line Bind the cables in group A separately
Secondary AC power line
(Note 1) from groups B and C, or
cover group A with an electromag-
A
AC/DC power lines (containing the
power lines for the servo motors)
netic shield (Note 2).
Connect spark killers or diodes with
AC/DC solenoid
the solenoid and relay .
AC/DC relay
DC solenoid (24VDC) Connect diodes with DC solenoid
and relay .
Bind the cables in group B separately
B
DC relay (24VDC)
from group A, or cover group B with
an electromagnetic shield.
Separate group B as far from Group
DC power line
C as possible.
It is more desirable to cover group B
with the shield.
Cable between the host and servo
amplifier unit
Bind the cables in group C sepa-
rately from group A, or cover group C
C
Cable for position and velocity feed-
back
with an electromagnetic shield.
Separate group C as far from Group
External pulse input
.
Be sure to
erform shield
roces-
Other cables to be covered with the
shield
sing.
NOTE
1 The groups must be 100mm or more apart from one another
when binding the cables in each group.
2 The electromagnetic shield refers to shielding between
groups with grounded steel plates.
Cable of group B, C
Cable of group A
Cabinet
Servo
amplifier
unit
Servo
amplifier
unit
host
NC
Duct
To operator’s
panel,
motor, etc.
Section
Group A Group B, C
Cover
D Separating signal lines