Using Contact Outputs (Common To All Units) - Omron CJ1W-EIP21 - 10-2010 Operation Manual

Network Installation
3-4-4

Using Contact Outputs (Common to All Units)

Mounting Location
Cable Location
Switching hub setting
100 Mbps Full duplex
(fixed)
Half duplex OK
Note Best = Recommended; OK = Allowed; --- = Not allowed.
When an EtherNet/IP Unit or built-in EtherNet/IP port and Contact Output Unit
are mounted in the same Rack or connected to the same PLC, communica-
tions errors may occur due to noise generated by the contact outputs. Use
one or more of the following measures when installing Contact Output Units
and EtherNet/IP Units on the same Rack.
Mount (or connect) any Contact Output Units as far away from the EtherNet/IP
Unit or built-in EtherNet/IP port as possible.
Contact Output Unit
Contact outputs
Separate the transceiver cable or twisted-pair cable connecting the EtherNet/
IP 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.
Contact Output Unit
EtherNet/IP Unit setting
Auto- 10 Mbps (fixed)
negotiation
Full
duplex
--- ---
---
EtherNet/IP Unit
To switching hub
Contact outputs
To switching hub
Section 3-4
100 Mbps (fixed)
Half Full Half
duplex duplex duplex
--- Best ---
--- --- OK
EtherNet/IP Unit
43