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CAN, LIN, ISO11898-2/3, USB to CAN, PCI to CAN, PC104 to CAN, UART to CAN, PCI Express to CAN, LIN to CAN, ISA to CAN, J1587, K-Line, SWC, J1850, CAN Development Kit

Smallest Integrated Device Server Ethernet to Serial

Part No: MPGC-Net-NET232jr


The NET232jr is the mini version of the NET232, an RS232-to-Ethernet cable adaptor that enables any device or machine with a serial port to become Ethernet network and Internet enabled. Now you can keep the IP address in the cable and exchange the serial device without having an IT person.    The NET232jr is designed to be an OEM device and can be customized to have different types of cables: RJ45, DB9/male, DB9/female or your custom connector. To help you with the possible customization options we have a selection guide, see the documentation section for this guide.

The major difference between the NET232 and the NET232jr is the jr requires that 3.3V or 5V be supplied on the serial connector.  The NET232jr features a powerful built-in device server so you can access your serial device from anywhere in the world over internet!  The NET232jr is easily configured via a web page and can also be set up through the serial port. You can use DHCP, AutoIP or assign a Static IP address to the NET232jr!

There are two basic modes of operation, 〝Redirector〞 and 〝Serial Tunneling〞.

Redirector Mode:  In Redirector Mode, only one NET232jr is needed per serial device.  ComPort Redirector Software (free with purchase) is installed on your Windows PC to create a 〝virtual〞 COM Port (e.g. COM3).  You can then use this COM port in your Software application just as you would any physical COM port attached to your PC.  Create a virtual COM Port for every NET232jr device on your network and connect to them all from a single PC!

Serial Tunneling Mode:  In Serial Tunneling mode, two NET232jr’s are used to create a 〝Serial Tunnel〞 over Ethernet.  This can be thought of as cable replacement.  Each NET232jr is configured to have a remote IP address that is the other NET232jr in the pair.  No software is required to be loaded on a PC.  Now you have an infinite length RS232 cable that is connected over the internet.   This configuration is also an excellent option for non-windows PCs or computers.


  • Local or Worldwide Ethernet 10/100M or Internet Connection
  • Serial baud rates (300, 600, 1200, 2400, 4800, 9600, 19.2k, 38.4k,
  • Ethernet activity, Power LED^s
  • Web Server, configuration and user pages
  • User defined serial cable (RJ45 shown), other options DB9
  • Encrypted Version available
  • Plastic housing
  • OEM versions available for small minimum quantity
  • Includes CD with Manuals, PC Setup and Virtual COM Port Redirector

    Serial Interface
    Data Rates 300 bps to 921,600 bps
    Characters 7 or 8 data bits
    Parity odd, even, none
    Stop Bits 1 or 2
    Flow Control XON/XOFF, RTS/CTS
    Connector DB9 - DTE (male) or DCE (female) or RJ45 or custom cables/connectors (call) also available
    Network Interface
    Interface Ethernet 10Base-T or 100Base-TX (Auto-Sensing)
    Connector RJ45
    Protocols TCP/IP, UDP/IP, ARP, ICMP, SNMP, TFTP, Telnet, DHCP, BOOTP, HTTP, and AutoIP
    Indicators (LED)
    • 10Base-T connection
    • 100Base-TX connection
    • Link & activity indicator - Full/half
    • Power
    • SNMP, Telnet, serial, internal web
         server, and Microsoft Windows®-
         based utility for configuration
    • Password protection
    • Optional 256-bit AES Rijndael
    Internal Web Server
    Storage Capacity 384KB for web pages
    CPU Based on the DSTni-EX enhanced 16-bit, 120MHz, x86 architecture
    Memory 256KB SRAM and 512KB flash
    Firmware Upgradeable via TFTP and serially
    Input Voltage 3.3VDC on the connector
    Dimensions 55mm x 30mm x 24mm - Case without Cable
    Weight 5.0 oz.
    Included Software
    MS Windows®-based DeviceInstaller software device installer and MS Windows-based Comm Port Redirector
  •      Download NET232jr Specification 

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