Omron G5 Series User Manual page 258

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.
• 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.
Manufacturer
NEC TOKIN
TDK
• Do not place the encoder cable with the following cables in the same duct.
Control cables for brakes, solenoids, clutches, and valves.
External Dimensions
ESD-SR-250
Up to
φ13
31.5
Impedance Characteristics
ESD-SR-250
10,000
1,000
100
10
1
1
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.
4 - 34
Product name
Clamp core ESD-SR-250
Clamp core ZCAT3035-1330
38.0
10 100
Frequency [MHz]
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User's Manual
Model Specifications
For cable diameter up to 13 mm
For cable diameter up to 13 mm
1,000