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4 System Design
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
4-4 Noise Reduction
4
4-4-2 Selecting Connection Components
Take the following steps during wiring and installation to improve the external encoder’s noise
resistance.
• Always use the specified external encoder 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.
z External Dimensions
z Impedance Characteristics
Improving External Encoder Cable Noise Resistance
Manufacturer Product name Model Specifications
NEC TOKIN Corporation Clamp core ESD-SR-250 13 mm dia. max.
TDK Clamp core ZCAT3035-1330 13 mm dia. max.
ESD-SR-250
31.5
31.6
38.0
Up to
Ø13
10,000
1,000
100
10
1
10 1001 1,000
ESD-SR-250
1T
2T
3T
Impedance [Ω]
Frequency [MHz]
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