4-50
4-3 Wiring Conforming to EMC Directives
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
4
System Design
Improving Encoder Cable Noise Resistance
Take the following steps during wiring and installation to improve the encoder's noise
resistance.
Always use the specified encoder cables.
Do not coil cables. If cables are long and are coiled, 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.
External Dimensions
Impedance Characteristics
Refer to the following sections for the dimensions and impedance characteristics of the
ZCAT3035-1330: "External Dimensions"(P.4-46) and "Impedance Characteristics"(P.4-47).
Manufacturer Product name Model Specifications
NEC TOKIN Clamp core ESD-SR-250
For cable dia. up to 13 mm
TDK Clamp core ZCAT3035-1330
For cable dia. up to 13 mm
31.5
to φ13
31.6
38.0
ESD-SR-250
10000
1000
100
10
1
Impedance (Ω)
10 100
Frequency (MHz)
11000
ESD-SR-250
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