Omron SYSMAC CJ1W-EIP21, Operation Manuals

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2-11
2 Installing Ethernet Networks
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
2-5 Co
nn
ectin
g to
th
e Netw
ork
2
2-5-3 N
oise Cou
nter
m
easures
fo
r Con
tact Output
Unit
s
When an EtherNet/IP Unit and Contact Output Unit are mounted in the same Controller, communica-
tions errors may occur due to the noise that is generated by the contact outputs. Take either of the fol-
lowing countermeasures.

Separating the Units
Separate the EtherNet/IP Unit as far as possible from the Contact Output Units.

Separating the Cables
Separate the twisted-pair cable that is connected to the EtherNet/ IP Unit as far as possible from the
wiring to the Contact Output Units.
2-5-3 Noise Countermeasures for Contact Output Units
Contact Output Unit
EtherNet/IP Unit
Contact outputs
To switching hub
Contact Output Unit
EtherNet/IP Unit
Contact outputs
To switching hub