Omron NJ Series User Manual page 74

2 Installing Ethernet Networks
 Between Two Ethernet Switches
Regardless of which baud rate is used, check with the Ethernet switch manufacturers for informa-
tion about installing the network between Ethernet switches, and in particular whether or not it is
necessary to connect the cable shields to the connector hoods.
Other Precautions When Laying the Twisted-pair Cable
• Firmly insert the connector until it locks into place when you connect the cable to the Ethernet switch
and the built-in EtherNet/IP port.
• Do not install the twisted-pair cable together with high-voltage lines.
• Do not install the twisted-pair cable near devices that generate noise.
• Do not install the twisted-pair cable in locations subject to high temperatures or high humidity.
• Do not install the twisted-pair cable in locations subject to excessive dirt, dust, oil mist or other con-
taminants.
Recommended Clamp Core and Attachment Method
When you use a NX-series CPU Unit and connect the cable shield only with the connector hood of the
Ethernet switch, you need to attach a clamp core to the EtherNet/IP port of the CPU unit.
The recommended clamp core and attachment method are given below.
 Recommended Clamp Core
Manufacturer
NEC TOKIN
ESD-SR-250 dimensions
13 dia. max.
 Recommended Attachment Method
• Attach a clamp core to the communications cable as shown below.
• Connect the communications cable as shown below.
2-10
Clamp core
31.5
Make two loops with the cable
as shown.
Product
38.0
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
Model
ESD-SR-250