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


Products Manual
  • USB2-4COM-M
  • USB2-4COM-M
  • USB2-4COM-M
  • USB2-4COM-M
USB2-4COMi-TB - 4-Port RS-232/422/485 USB-to-Serial Adapter, with Surge Protection


  • Supports USB 1.1 and USB 2.0 transfer speeds from 1.5Mbps up to 480Mbps, automatic link and speed detection

  • Adds four high-speed RS-232/422/485 serial ports via USB connection

  • 2kb transmit and receive buffer and for high speed data throughput

  • Requires no IRQ, DMA, I/O port

  • Data rates: 300bps to 921.6kbps

  • Each serial port supports 5-pin screw-lock-type terminal block connector

  • Auto-transmit buffer control for 2-wire RS-485 half-duplex operation

  • Biasing and Termination resistors installed on-board

  • Supports RS-232 3-wire signals: RxD, TxD, GND

  • Supports RS-422, RS-485 4-wire signals: TxD-, TxD+, RxD+, RxD-

  • Supports RS-485 2-wire signals: Data-, Data+

  • Monitor LEDS of TxD, RxD indicating port status

  • Supports 15kV ESD protection and 600W surge protection

  • AC to DC-12V, 1A switching power supply included

  • Virtual COM port drivers available for Windows 10, 8.1, 8, 7, Vista, 2003, 2000

  • Industrial grade metal case with DIN-rail ears for Din-rail mounting

  • Chipset: FTDI FT4232H USB 2.0 to quad UART chip

Compliance USB 1.1/2.0 compatible
Speed 480Mbps, hi-speed USB
FIFO 2kb transmit FIFO
2kb receive FIFO
Serial Interface
Port Type RS-232/422/485
Number of Ports 4
Connectors Four 5-pin screw-lock-type terminal block connectors
Serial Line Protection
ESD Protection 15kV ESD protection, 600W surge protection
Serial Port Speed
Baudrate 300bps to 921.6kbps
Serial Signals
RS-232 TxD, RxD, GND
RS-422 TxD-, TxD+, RxD+, RxD-
RS-485 TxD-, TxD+, RxD+, RxD-, GND ( 4 wire)
Data-, Data+, GND (2 wire)
Operating Temperature 0°C to 60°C
Operating Humidity 0 to 80% RH, Non-condensing
Storage Temperature -40°C to 85°C
Safety Approvals CE, FCC

RS-232 Mode Pin-out

Pin Signal
3 TxD Transmit Data
4 RxD Receive Data
5 GND Signal Ground

RS-422/485 Full Duplex Mode Pin-out

Pin Signal
1 TxD- Transmit Data, negative polarity
2 TxD+ Transmit Data, positive polarity
3 RxD+ Receive Data, positive polarity
4 RxD- Receive Data, negative polarity
5 GND Signal Ground

RS-485 Half Duplex Mode Pin-out

Pin Signal
1 Data- Transmit/Receive Data, negative polarity
2 Data+ Transmit/Receive Data, positive polarity
5 GND Signal Ground