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Serial Ethernet Converter (RS232, RS485) - Ultimate

  • Model: US2000B-HB
  • In Stock


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The Bit Commander™ is our latest addition to our line of serial to Ethernet converters, and it is one of the most reliable and solid converters you will find of this type. It is an all-round product with basic functions but also has several advanced features and functions which are rarely seen in converters at this price range. It is ideal for most applications and environments including consumer, office, laboratory, commercial and even complex industrial applications.

ARM® Cortex™-M4F Processor

The Bit Commander™ serial to Ethernet converter is designed around the ARM Cortex-M4F processor from Texas Instruments which makes this it an extremely reliable and high performance converter with several advanced functions. The Cortex-M4F processor incorporates multiple fail-safe and error detection features which ultimately results in less problems and more uptime.

Advanced Features

As mentioned earlier the Bit Commander™ converter has several advanced features usually not seen in this range of converter, here are some of the features (please refer to the datasheet for all details):

  • Modbus compatible.
    Industrial applications often use the Modbus protocol to communicate with serial devices. This converter is fully compatible with the ModBus TCP and RTU protocols.

  • Both serial ports can be used individually at the same time.
    The Bit Commander™ has two serial ports, one RS232 port and one RS485 port, both ports can be used as individual COM ports and transfer two separate data streams at the same time. After installing the included Virtual COM Software two COM ports will be created in your computer's Device Manager.

  • Multiple Clients Support.
    Each serial port supports up to 8 simultaneous clients in TCP mode, meaning that 8 computers can connect to the converter at the same time. This is a nice feature to have if you have a large network with many clients.

  • Web to Serial Mode.
    You can login to the converter with a web browser over a network and read the serial data processed by the converter.

  • Remote Reboot over TCP.
    If the converter for some reason should require a reboot because of a lock-up, for example due to a power outage or similar, it can be rebooted remotely over TCP by sending a HEX code to the converter. This is a very convenient feature if the converter is located far away.

  • Other Special Functions:
    Just to mention a few of the minor features:
    • Supports non-standard baud rates
    • Baud rates 600 to 230400 bps
    • Hardware flow control RTS/CTS
    • Software flow control XON/XOFF
    • RAW COM port mode (all lines)
    • User defined MAC address
    • Adjustable timeout counter
    • Adjustable module ID and ID type

    Please see the datasheet and user manual for more details.

Besides the features mentioned above this converter is also fully capable of handling more complex setups such as Serial Tunneling mode, communication without virtual COM software, access over Internet and more.

RS232 to Ethernet converter diagram

Overall features
  • Highly reliable ARM Cortex-M4F processor
  • Industrial strength
  • RS232 and RS485 ports
  • Serial ports can be used simultaneously
  • Advanced functions and features
  • Virtual COM port software included
  • Modbus support
  • Configurable via web-browser and software

Useful optional accessories
(not included)

Null modem adapter
Null modem adapter

DB9 to RJ45 adapter
DB9 - RJ45 adapter

DB9 gender changer
Gender Changer

Model number US2000B-HB (aka Bit Commander™)
Operating system
Virtual COM software included for:
Windows 11 32/64-bit, Windows 10 32/64-bit, Windows 8 32/64-bit, Windows 7 32/64-bit, Vista, XP
Processor Texas Instruments ARM® Cortex™-M4F TM4C1294
No. of serial ports 1 port RS-232, male DB9
1 port RS485 screw terminal
Ports can be used individually at the same time.
PORT0 represent RS232, PORT1 represent RS485.
RS-232 Signals - TX, RX, RTS, CTS, GND
- Parity: None, Odd, Even, Mark, Space
- Data bits : 5, 6, 7, 8
- Stop bits : 1, 2
Flow Control RS232: Hardware (RTS/CTS), Software (XON/XOFF), None, RAW mode (all lines)
RS485: Automatic Send Control, Software (XON/XOFF), None
RS-485 Signals Data+ , Data-, GND
Baud rates Port 0 (RS232): 600 - 230400 bps
Port 1 (RS485): 600 - 230400 bps
Non-standard baud rates supported
Serial buffer size TX: 2 bytes
RX: 2 bytes
Serial package time 1 - 255 ms
Serial package length 1 - 1460 bytes
LAN port RJ45, Auto-MDI/MIDX, 2KV isolation
Protocols TCP Server, TCP Client, UDP, UDP Server, HTTPD Client, DHCP, Web to serial, TCP Auto, ModBus TCP/RTU
Parameter management Web-browser or software utility (over WiFi)
Modbus Yes (TCP and RTU)
Max number of clients. This is how many computers that can access the converter simultaneously 8 clients for each port in TCP mode.
Power 5 - 36VDC
Current draw 5VDC: 95mA max
12VDC: 43mA max
36VDC: 16mA max
Operating Temp. -13°F to 176°F (-25°C to 80°C)
Dimensions 80 x 83 x 25mm
Approvals CE, FCC, ROHS
Warranty 1 year Limited Warranty

For alternative serial to Ethernet solutions please see our full selection of serial Ethernet converters.

Read the Review
Date Added: 11/09/2014 by Eric Sanders
5 of 5 Stars!5 of 5 Stars!
As an engineer myself I have been using many of this type of converters over the years, I can say th...

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