USB-COMi-TB 1-port USB to serial adapter (RS422/485) with terminal block




  • Adds a high speed RS-422/485 serial port by connecting to a USB port
  • Serial operation mode can be easily changed by sliding open the upper case
  • Robust and compact plastic housing
  • Powered by USB port, no external power adapter required
  • 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 10kV
  • Easy plug and play installation and RS-422/485 device connection
  • High speed serial port with baud rate up to 921.6kbps
  • Supports Windows XP to 10, Server 2000 to Server 2016 (WHQL certified)
  • Supports Linux Kernel 2.4 and above
  • Supports Mac OS X 10.9 and above, driver signed by Apple




ComplianceUSB 1.0/1.1 compliant, USB 2.0 & 3.0 compatible
Speed12Mbps, full-speed USB
FIFO128 byte transmit
384 byte receive
Serial Interface
Number of Ports1
Connector5-pin terminal block
Max. Speed921.6kbps for transmit & receive
RS-422 SignalsTxD-, TxD+, RxD+, RxD-, GND, RTS+, RTS-, CTS+, CTS-
RS-485 Signals (4-wire)TxD-, TxD+, RxD+, RxD-, GND
RS-485 Signals (2-wire)Data-, Data+, GND
Protection10kV ESD protection for all signals
Serial Communication Parameters
Data Bits5, 6, 7, 8
ParityNone, odd, even, mark, space
Stop Bit1, 1.5, 2
Flow ControlHardware (RTS, CTS), XON/XOFF
Power InputPower supplied via USB (5V) connector
No external power needed
CasingPlastic, ABS
Operating Temperature0°C to 55°C (32°F to 131°F)
Storage Temperature-20°C to 75°C (-4°F to 167°F)
Operating Humidity5% to 95% RH
Safety ApprovalsCE, FCC
Ordering information
Part number       326015