[USB-401] 8 channel USB RS232 Converter HuMANDATA LTD.

[USB-401] 8 channel USB RS232 Converter MAX 1Mbps

RoHS10 8ch RS232 DB9 Isolated SurgeProtection HUBx2
NonChemi-Con Flame-retardant-ABS

USB to RS232C Converter ISOLATED
Non-use of 6 Restricted substances of RoHS directive.

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USB-401 is an 8 channel USB to RS-232C converter that isolated between each RS-232C channel and 2 USB ports. Also, the 2 port USB connectors have a HUB function.



  • Supports RS232C
  • 2500VDC bus isolation
  • Baud rate up to 1Mbps
  • Supports custom baud rate
  • Auto transmit data control
    Built-in USB-serial chip has auto transmit controller and the driver is activated when it transmit the data
  • USB-401 is powered through a USB port (Bus-powered) or an AC adapter (Self-powered)
  • ESD and surge protection
  • Housing material: Plastic
  • DIN rail and screw mountable (Attachment is required)
  • Includes a USB cable (1.8m)
  • Includes an AC adapter
  • Non-use of 10 Restricted substances of RoHS directive


Item Description Remarks
Model USB-401  
Input Power DC 5V / Less than 500mA
Supplied through a USB port
(Bus-powered) or AC adapter
Recommend the use of an AC
adapter for stably supply.
HOST Interface USB 2.0 compliant (Support Hi Speed) USB 1.1 compatible
ESD protection ESD_11kV
HOST Connector USB B type (Female)  
Processor FT4232H x 2 FTDI
Isolation Method Bus Isolation  
Isolation Protection Over 2500VDC Designed value
I/O Interface RS232C ESD protection ESD_15kV
Number of RS232C Port 8  
RS232C Connector D-SUB 9pin Male (#4-40 UNC)  
Communication Method Asynchronous Serial
Baud Rate 300 bps to 1 Mbps Support custom baud rate
Data Bits 7 or 8 bit  
Stop Bits 1 or 2 bit  
Parity Even, Odd or No-parity  
FIFO RX Buffer Size 2K bytes/ch  
FIFO TX Buffer Size 2K bytes/ch  
Number of USB Hub Port 2  
USB Hub Port Connector USB A type (Female) x 2  
USB Driver Virtual COM port driver  
Support OS Windows 10/8.1/8/7/Vista/XP  
Operating Ambient Temperature -20 to 60℃ (-4 to 140 [°F]) No condensation permitted
Operating Ambient Humidity 30 to 85%RH No condensation permitted
Storage Ambient Temperature -20 to 55℃ (-4 to 131 [°F]) No condensation permitted
Storage Ambient Humidity 30 to 85%RH No condensation permitted
Weight Approx. 400 [g] Only main body
Dimensions 166 x 81.2 x 50 [mm]
(6.535" x 3.197" x 1.969")
Without projections

* Power saving function (suspend, standby, sleep and others) is not supported

RS232C Connector pinouts

Pin No Name Direction Notes
1 DCD IN Data carrier detect
2 RXD IN Receive data
3 TXD OUT Transmit data
4 DTR OUT Data terminal ready
5 GND - Signal ground
6 DSR IN Data set ready
7 RTS OUT Request to send
8 CTS IN Clear to send
9 RI IN Ring indicator
CASE FG - Connected to GND

Package Contents

  • USB-401
  • USB cable 1.8m
  • AC adapter
  • Driver & Application CD

Price and Optional Accessories

Description MODEL Image List Price (JPY) Stock Status
8 channel USB RS232 Converter
(Common Isolation Type)
USB-401 USB-401
Attachment for horizontal direction
ACC-028 ACC-028
Attachment for DIN rail type B
ACC-031 ACC-031
Neodymium magnet set
ACC-036 ACC-036
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© HuMANDATA LTD. - Altera & Xilinx FPGA Boards manufacturer in Japan - 2016