ETH-CJ-2P Ethernet Module


The ETH-CJ-2P Ethernet module is a device that allows Omron CJ series PLCs to communicate over Ethernet using the RS232 and TCP/Modbus protocols. It acts as a converter, allowing communication between the PLC and Ethernet networks.


The ETH-CJ-2P module is an economical Ethernet communication processor designed to meet the increasing demand for factory equipment information needs (equipment network monitoring and production management). It can realize OMRON CJ series (CJ1M/CJ2M/CS1/CG1/NX1P) most PLC network communication functions, through the upper computer software with It can download and monitor the PLC through the network port of the host computer software. The module comes with two serial ports, one connects to the PLC and one can also The module comes with two serial ports, one connected to the PLC and one to the touch screen, so that the operator on site can operate the touch screen to collect and monitor data from the PLC at the same time.

  • No need for external power supply, can be directly powered from the RS232 programming communication port of PLC
  • Extend the PLC RS232 port with an Ethernet communication port and a touch screen communication port to restore the PLC communication function and realize PLC networking and communication with touch screen at the same time
  • Supports up to four client connections (1 FINS TCP, FINS UDP, 2 Modbus TCP)
  • Parameter setting and operation of the device can be done through WEB server
  • Supports up to 115200 baud rate communication, which can adapt to the needs of large data volume communication
  • Supports Ethernet communication with CX-Programmer

Model ETH-CJ-2P
Connect with CX-Programmert Ethernet
Protocol FINS/TCP, FINS/UDP. Modbus TCP
PLC models that support connection CJ1/CJ2/CS1
Ethernet interface IEEE802.3 compatible, LINK/ACTIVE indicator, line sequence adaptive
Interface Type RJ45
Transmission rate 10/100Mbps
IP Default IP
Port number*1 Fixed port:9600
Number of clients Maximum support for 4 client connections(1*TCP, 1*UDP. 2 channel Modus TCP)
Communication distance 100m
PLC port connected to PLC
Interface Type DB9 communication port
Transmission rate According to the setting of PLC
Protocol support Omron programming port protocol
HMI port Connect to HMI
Interface Type DB9 communication port
Transmission rate Default 9.6K, baud rate adaptive
Protocol support HostLink
Programming software CX-Programmer
Communication stability Uninterrupted communication with PLC, 24 hours, 2 million 0 errors

Additional information

Weight 0.2 kg





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