Omron OMNUC G User Manual page 220

4-3 Wiring Conforming to EMC Directives
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 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 filters.
The following table shows the recommended clamp filters.
4
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.
Dimensions
ESD-SR-250
Impedance Characteristics
ESD-SR-250
10000
1000
100
4-39
Manufacturer Product name
Clamp Filters
Clamp Filters
~13
dia.
31.5
10
1
1 10
Frequency(MHz)
Model
ESD-SR-250
ZCAT3035-1330
38.0
100 1000
Specifications
For cable diameter up to
13 mm
For cable diameter up to
13 mm