Omron CJ1W-ETN11 Operation Manual page 280

Network Installation
Cable Location
Separate the transceiver cable or twisted-pair cable connecting the Ethernet Unit as far from the wiring to the
Contact Output Units as possible. The coaxial cable must also be placed as far away from the Contact Output
Units and their wiring as possible.
Transceiver/Hub Measures
Attach several ferrite cores designed for EMI countermeasures on the transceiver cable or twisted-pair cable
near the transceiver/hub. The transceiver must also be placed as far away from the Contact Output Units and
their wiring as possible.
Contact outputs
Contact Output Unit
Ethernet Unit
Transceiver
cable
Ethernet Unit
To transceiver/hub
Ferrite core
Transceiver/Hub
Appendix A
259