31.5 38.0
31.6
13 dia. max.
l
Recommended Attachment Method
• Attach a clamp core to the communications cable as shown below.
Make two loops with the cable
as shown.
• Connect the communications cable as shown below.
Attach close to the cable
connection as shown.
EtherNet/IP
port
5-2-4
Precautions When Installing and Connecting Ethernet Switches
Precautions When Installing Ethernet Switches
• Do not ground the Ethernet switch in the same location as a drive-system component, such as an
inverter.
•
Always use a dedicated power supply for the Ethernet switch. Do not use the same power supply for
other equipment, such as an I/O power supply, motor power supply, or control power supply.
• Before installation, check the Ethernet switch's environmental resistance specifications, and use an
Ethernet switch that is appropriate for the ambient conditions. Contact the Ethernet switch manufac-
turer for details on Ethernet switch's environmental resistance specifications.
Ethernet Switch Connection Methods
• Connect Ethernet switches with twisted-pair cables, as follows: Connect an MDI port to an MDI-X
port with a straight cable. Connect two MDI ports or two MDI-X ports with a cross cable.
Note It is very difficult to distinguish cross cables and straight cables by appearance. Incorrect cables will
cause communications to fail. We recommend cascade connections with straight cables wherever possi-
ble.
5 Installing Ethernet Networks
5-11
NX-series EtherNet/IP Unit User's Manual (W627)
5-2 Network Installation
5
5-2-4 Precautions When Installing and Connecting Ethernet Switches