Special Wiring; Wiring Precautions - YASKAWA SGMAH User Manual

Sigma II User's Manual

5.8 Special Wiring

This section describes special wiring methods including the one for noise control. In
addition to 5.8.1 Wiring Precautions and 5.8.2 Wiring for Noise Control, refer to other
sections as necessary.
5.8.1

Wiring Precautions

To ensure safe and stable operation, always observe the following wiring
precautions:
1. Always use the following cables for reference input and encoder wiring.
Cable Type
Reference
Twisted pair wires
Input
Multi-conductor
Encoder shielded twisted
pair wire
• Trim off the excess portion of the cable to minimize the cable length.
2. For a ground wire, use as large a wire as possible: AWG14( 2.0mm
At least class-3 ground (100 Ω maximum) is recommended.
•
• Ground to one point only.
• If the motor is insulated from the machine, ground the motor directly.
3. Do not bend or apply tension to cables.
The conductor of a signal cable is very thin (0.0079 to 0.012in. (0.2 to 0.3mm)),
handle the cables with care.
4. Use a noise filter to prevent noise interference.
(For details, Refer to 5.8.2 Wiring for Noise Control).
• If the equipment is to be used near private houses or may receive noise
interference, install a noise filter on the input side of the power supply line.
• Since this servo amplifier is designed as an industrial device, it provides no
mechanism to prevent noise interference.
5. To prevent malfunction due to noise, take the following actions:
Yaskawa
Drawing Number
JZSP-CKI01
JZSP-CMP00 SGMAH, SGMPH
JZSP-CMP02 SGMGH, SGMSH
5-109
Chapter 5: Parameter Settings and Functions
Maximum Allowable Length
118in (3m)
787in (20m)
1969in (50m)
2
) or larger.