Omron G5 Series User Manual

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

Omron G5 Series Specifications

General

Feedback	Incremental Encoder, Absolute Encoder
Communication	EtherCAT
Safety Function	STO (Safe Torque Off)
Protection Functions	Overvoltage, Undervoltage, Overcurrent
Vibration Resistance	4.9 m/s² (10 to 55 Hz)