PRODUCTS > USB to RS-232/422/485 > DIN Rail > USB2-4COMi-SI-TB


 Products Manual


USB2-4COMi-SI-TB - Hi-Speed 4-Port USB to Serial Adapter (Terminal Block, RS-232/422/485) with Metal Case and Optical Isolation


  • Adds four high speed RS-232/422/485 serial ports by connecting to a USB port
  • 3000V DC optical isolation for all signals
  • SECC metal chassis with DIN rail bracket
  • LEDs indicate TxD and RxD for easy port monitoring and diagnosis
  • Installs as a standard Windows COM port
  • Automatic transmit and receive control for 2-wire RS-485 half-duplex mode
  • Built-in termination and biasing
  • Serial port protected with surge protection of 15kV
  • Non-standard baudrates supported
  • Easy plug and play installation and RS-232/422/485 device connection
  • High speed serial port with baud rate up to 921.6kbps


Compliance USB 1.0/1.1 compliant, USB 2.0 & 3.0 compatible
Speed 480Mbps, hi-speed USB
FIFO 2kb transmit
2kb receive
Serial Interface
Interface RS-232/422/485
Number of Ports 4
Connector 5-pin terminal block
Max. Speed 921.6kbps for transmit & receive
RS-232 Signals TxD, RxD, GND
RS-422 Signals TxD-, TxD+, RxD+, RxD-
RS-485 Signals (4 wire) TxD-, TxD+, RxD+, RxD-, GND
RS-485 Signals (2 wire) Data-, Data+, GND
Protection 15kV ESD protection for all signals
3000V DC optical isolation for all signals
Serial Communication Parameters
Data Bits 7, 8
Parity None, odd, even, mark, space
Stop Bit 1, 1.5, 2
Flow Control Hardware (RTS, CTS), XON/XOFF
Power Input DC 12V, 1A external power adapter
Casing SECC metal chassis with DIN rail bracket
Operating Temperature 0°C to 60°C (32°F to 140°F)
Storage Temperature -40°C to 85°C (-40°F to 185°F)
Operating Humidity 0% to 80% RH
Safety Approvals CE, FCC