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Chapter 4: PLC Communications
W-3: Com Port 1 (Ethernet) Wiring
W-3
Com Port 1 (Ethernet) supports 10/100 Base-T Ethernet with an RJ-45 style connector.
8 pin RJ45 Phone
You can use both straight and cross over cables with Com Port 1.
Wiring Strategy
• There are two wiring methods to connect to devices
which support Modbus TCP protocol.
• Case 1: Connect Com Port 1 to a device that supports
Modbus TCP protocol directly such as a PC.
• Case 2: Connect Com Port 1 to other devices that support
the Modbus TCP protocol via a switch or hub.
Case 1: Connect Com Port 1 to a device that supports the Modbus TCP protocol
directly such as a PC.
In this illustration a PLC unit is connected directly to a PC.
4-16
CLICK PLUS PLC Hardware User Manual, 1st Edition, Rev. B – C2-USER-M
Type Jack
Port 1 Pin Descriptions
1 TX+
Transmit Data (+)
2 TX-
Transmit Data (-)
3 RX+
Receive data (+)
4 NC
Not connected
5 NC
Not connected
6 RX-
Receive Data (-)
7 NC
No connection
8 NC
No connection
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