Yaskawa SGDB - Manual (Page 154)

APPLICATIONS OF Σ-SERIES PRODUCTS
3.8.1 Wiring Instructions
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3.8 Special Wiring
This section describes special wiring methods including the one for noise control. Always
refer to Section 3.8.1 Wiring Instructions and 3.8.2 Wiring for Noise Control, and refer to other
sections as necessary.
3.8.1 Wiring Instructions
To ensure safe and stable operation, always refer to the following wiring instructions.
NOTE Always use the following cables for reference input and encoder wiring.
Cable Type Yaskawa Drawing No.
Maximum
Allowable
Length
For reference
input
Twisted-pair
cables
DE9406969 3 m (9.8 ft.)
For encoder
Multiconductor
shielded
twisted-pair cable
B9400064 (for incremental
encoder)
DP8409123 (for absolute
encoder)
20 m (65.6 ft.)
NOTE For a ground wire, use as thick a cable as possible.
• Trim off the excess portion of the cable to minimize the cable length.
• At least class 3 grounding (ground to 100 Ω or
less) is recommended.
• Always use one-line grounding.
• If the motor is insulated from the machine, ground the motor directly.
• Select grounding phase and grounding point in accordance with the national code and
consistent with sound local practices.
NOTE 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.
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