[USB-501] USB to RS-232C Converter Compact HuMANDATA LTD.

[USB-501] USB to RS-232C Converter Compact

RoHS10 RS232 DB9 Isolated cdc_uart
NonChemi-Con Flame-retardant-ABS.gif

Compact isolated USB RS-232C Converter
Supports up to 1 Mbps, and custom baud rate setting

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USB-501 is a USB to RS232C converter that isolated with 2500VDC between RS232C and a USB port. It supports High Speed baud rates of up to 1Mbps. The device driver uses the standard CDC (Communication Device Class) driver included in the OS.



  • 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
  • Controllable from embedded Linux devices
    It operates as a device of the standard CDC-ACM class.
    For Linux distributions with embedded CDC-ACM device drivers, you can use them without installing the drivers.
    We do not support the use of Linux itself.
  • No external power supply is required
    USB-501 is powered through a USB port (Bus-powered)
  • Reliable industrial grade design
  • ESD and surge protection
  • Housing material: Plastic
  • DIN rail, magnet, and screw mountable (Attachment is required)
  • Includes a USB cable (1.8m)
  • Non-use of 10 Restricted substances of RoHS directive


Item Description Remarks
Model USB-501  
Input Power 5VDC
Supplied through a USB port (Bus-powered)
No external power supply required
Current Consumption Less than 100 mA  
I/O Interface RS-232C ESD protection ESD_15kV
Communication Method Asynchronous Serial
HOST Interface USB 2.0 compliant
Support Full Speed (12 Mbps)
USB 1.1 compatible
ESD protection ESD_11kV
Baud Rate 300 bps to 1 Mbps Support custom baud rate
Data Bits 8 bit (Fixed)  
Stop Bits 1 bit (Fixed)  
Parity No-parity (Fixed)  
Flow control RTS/CTS (Fixed)  
FIFO RX Buffer Size 128 bytes  
FIFO TX Buffer Size 128 bytes  
Isolation Method Bus Isolation  
Isolation Protection 2500VDC Designed value
USB Driver Virtual COM port driver  
Support OS Windows 10/8.1/8/7  
LED PWR: USB bus power
TX/RX: Transmit/Receive data, Bi-color LED
(TX: green, RX: red)
USB Connector Standard Type B Female  
RS232C Connector D-SUB 9pin Male (#4-40 UNC)  
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. 50 [g] Only main body
Dimensions 67 x 43.5 x 27 [mm]
(2.638" x 1.713" x 1.063")
Without projections

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

RS232C Connector pinouts

Pin No Name Direction Notes
1 NC -  
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 NC -  
CASE FG - Connected to GND

Package Contents

  • USB-501
  • USB cable 1.8m
  • Driver & Application CD

Price and Optional Accessories

Description MODEL Image List Price (JPY) Stock Status
USB to RS-232C Converter Compact
USB-501 USB-501
Attachment with clamping screw
PEN-003 PEN-003
Attachment for 35mm DIN rail
Attachment with neodymium magnet
PEN-003-MG PEN-003-MG
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© HuMANDATA LTD. - Altera & Xilinx FPGA Boards manufacturer in Japan - 2016