4-47
4 System Design
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
4-3 Wiring Conforming to EMC Directives
4
4-3-2 Selecting Connection Component
Take the following steps during wiring and installation to improve the external encoder's noise resistance.
• Always use the specified external 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 external encoder cables, use clamp cores.
The following table shows the recommended clamp cores.
Precautions for Correct UsePrecautions for Correct Use
Do not place the external encoder cable with the following cables in the same duct.
• Control cables for brakes, solenoids, clutches, and valves.
External Dimensions
Impedance Characteristics
For information on an external dimensions and impedance characteristics of ZCAT3035-1330, refer to
External Dimensions on page 4-43 and Impedance Characteristics on page 4-45.
Improving External 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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