4 System Design
4 - 34
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
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.
External Dimensions
Impedance Characteristics
Refer to External Dimensions on page 4-30 and Impedance Characteristics on page 4-31 for
information on the external dimensions and impedance characteristics of the ZCAT3035-1330 clamp
core.
Improving Encoder Cable Noise Resistance
Manufacturer
Product name
Model
Specifications
NEC TOKIN
Clamp core
ESD-SR-250
For cable diameter up to 13 mm
TDK
Clamp core
ZCAT3035-1330
For cable diameter up to 13 mm
31.5
Up to
φ13
31.6
38.0
ESD-SR-250
10,000
1,000
100
10
1
Impedance [Ω]
10
100
Frequency [MHz]
1
1,000
ESD-SR-250
Summary of Contents for G5 R88D-KE Series
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