4-13
4-4 Wiring Servo Motor
SIGNALS AND WIRING
- SV Series User’s Manual -
● Precautions on connector
For connector, be sure to notice the followings.
• When connecting the connectors, connection part should be checked whether there are garbage or metal coupon
or other foreign matters.
• Be sure to check whether there is wiring error when wiring.
• Be sure to avoid the connector part being pressed when wiring.
• Do not exert strong impact to connectors. Because the material is resin, it may be damaged.
• Be sure to hold the servo motor to move it when moving servo motor with connected cables. When the cables are
held, there may be stresses on the cables, which may damage the connector or break the cable.
● Precautions on cable
SV series can be wired with standard cables and flexible cable.
Overbending or tension should be avoided on cable itself or cable leads. Recommended cable bending radius R is as
follows.
• Standard cable
Recommended cable bending radius R of fixed part
50W to 400W : >= R15
750W : >= R20
1kW to 5kW : >= R15(Encoder cable)
Over 10 times the cable outer diameter (Motor power cable)
>= R79(Electromagnetic brake power cable)
* Can not be used for bending purpose
• Flexible cable
Recommended cable bending R of bending radius part : >= R90
Bending lifetime
: >= 10 million times
Recommended cable bending radius R of fixed part
50W to 400W : >= R15
750W : >= R20
● Wiring flexible cables
Please notice the followings.
• Torsion of cables
Cable surface should be checked whether there is torsion phenomenon, so as to ensure wiring in the status that
cables are straight. cable torsion may cause cables break.
• Cable length
When cables are too short, tension at the fixed position will increase; or when cables are too long, they may be
relaxed, which may lead to cable break. Proper length of cables should be used.
• Fix of cables
Movable part of the cables should not be fixed, or be fixed with the minimum limit. Otherwise concentrated stress at
the fixed position may cause the cable break.
At the same time, stresses at the connector position of servo motor and servo amplifier should be avoided.
It may damage the cables.
• Distance from other cables
Be sure to leave enough distance from other cables when wiring, or baffles must be used to prevent interferences
among cables. Interferences among cables may limit the movement of cables, and may cause cable breaks.
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