4 System Design
4-52
G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
Take the following steps during wiring and installation to improve the encoder's noise resistance.
• Always use the specified encoder cables.
• If cables are joined midway, be sure to use connectors. And do not remove more than 50 mm of the
cable insulation. In addition, always use shielded cables.
• Do not roll cables. If cables are long and are rolled, mutual induction and inductance will increase and
cause malfunctions. Always use cables fully extended.
• When installing noise filters for encoder cables, use clamp cores.
• The following table shows the recommended clamp cores.
• Do not place the encoder cable with the following cables in the same duct.
Control cables for brakes, solenoids, clutches, and valves.
z External Dimensions
z Impedance Characteristics
For information on an external dimensions and impedance characteristics of ZCAT3035-1330, refer to
External Dimensions on page 4-48 and Impedance Characteristics on page 4-50.
Improving Encoder Cable Noise Resistance
Manufacturer Product name Model Specifications
NEC TOKIN Clamp core ESD-SR-250 13 mm dia. max.
TDK Clamp core ZCAT3035-1330 13 mm dia. max.
31.5
Up to ø13
31.6
38.0
ESD-SR-250
10000
1000
100
10
1
Impedance (Ω)
10 100
Frequency (MHz)
1 1000
ESD-SR-250
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