2.8Special Wiring
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2.8
Special Wiring
This section describes special wiring methods including the one for noise control. Always
refer to
2.8.1 Wiring Precautions
and
2.8.2 Noise Control
, and refer to other sections as
necessary.
2.8.1 Wiring Precautions
To ensure safe and stable operation, always refer to the following wiring precautions.
1) Use the following cables for reference input and encoder wiring.
Purpose
Cable Type
Yaskawa Drawing No.
Maximum
Allowable
Length
For reference
input
Twisted-pair
cable
DE9404859
3 m (9.8 ft.)
For encoder
Multiconductor
shielded
twisted-pair cable
JZSP-CFP09 (for incremental
encoder)
5 m (16.40 ft.)
•
Trim off the excess portion of the cable to minimize the cable length.
2) For the ground wire, use as thick a cable as possible.
•
Ground resistance of 100
Ω
or less is recom-
mended.
•
Always use one-line ground.
•
If the motor is insulated from the machine, ground the motor directly.
3) Do not bend or apply tension to cables.
•
Since the conductor of a signal cable is very thin (0.2 to 0.3 mm), handle it with ade-
quate care.
4) Use a noise filter to prevent radio interference.
(For details, refer to
2.8.2 Wiring for Noise Control
.)
•
If the servo is to be used near private houses or
may receive radio interference, install a noise fil-
ter on the input side of the power supply line.
Since this Servopack is designed as an indus-
trial device, it provides no mechanism to prevent
radio interference.
2
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