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The Serial-to-Ethernet (S2E) bridge is a ready-to-use protocol converter that is intended for extending the communications reach of an existing device with a serial interface (RS232/RS485) over an ethernet network. (intranet, internet)

Original configuration

The original configuration consists of a device that has a serial interface (RS232/RS485) and PC that runs a OEM specific application that communicates with the OEM device over the serial interface, possibly using a customer specific protocol.

Figure 1: Original (local) configuration 



Example configurations for remote access with S2E bridge



Figure 2: Remote access over ethernet (intranet - LAN)



Figure 3: Remote access over ethernet (internet - WAN)

With the S2E bridge data is ‘bridged’ transparently between the PC and the OEM device, ethernet (TCP/IP) is used as a transport channel to get the data to/from the device.



  • NCS0401 with AC/DC power adapter.


  • CLI application, enables remote control of S2E bridge using telnet.

  • S2E application, bridges IP packets between the ethernet and one of the serial interfaces of the NCS0401. The S2E applications supports:

    • Serial communications: baudrates from 2400 to 57600 baud, 7 or 8 data bits, 1 or 2 stop bits, odd/even/no parity, no flow control or XON/XOFF flow control.

    • Programmable begin-of-message (BOM) and end-of-message (EOM) detection. Detection can be time-out based, or character (sequence) based.

    • Configurable TCP/UDP port.

All software is pre-installed on flash disk of the NCS0401.


  • CD-ROM with installation manual, data sheets and application notes.


  • One year of free application updates when they become available.

Not included

  • Ethernet cable - the type of ethernet cable (patch cable/cross-over cable) and the length of the cable that is required for connection to the S2E bridge depends on your specific network situation.
  • Serial cable - the type of serial cable (RS232/RS485, cross/nul-modem, etc) and the length of the cable that is required for connection to the S2E bridge to you're device depends on the interface options available with your device.

 Click here to contact us for more information about the S2E bridge.


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Phone: +31 (0)55-3601410, fax +31 (0)84-7246122
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Last updated:07-jan-2013