[USB-033] 4 Channel RS232C/USB Converter (Independent Isolation Type) HuMANDATA LTD.

[USB-033] 4 Channel RS232C/USB Converter (Independent Isolation Type)

RoHS10 RS232 DB9 HI-SPEED Isolated SurgeProtection Flame-retardant-ABS

USB to RS232C Converter ISOLATED

Permalink of this page:


USB-033 is a 4 channel USB to RS-232C converter that isolated with 2500VDC between each RS-232C serial port and a USB port. You can use 4 channels of RS232C serial port from a USB port. Those 4 channels are isolated independently from a USB side.
It supports High Speed baud rates of up to 1Mbps. This is designed around the high performance industry proven FTDI chipset. USB-033 is Non-use of 10 Restricted substances of RoHS directive. 



  • 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
  • No external power supply is required
    USB-033 is powered through a USB port (Bus-powered)
  • ESD and surge protection
  • Housing material: Plastic
  • DIN rail 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-033  
Input Power DC 5V / Less than 450mA
Supplied through a USB port
No external power supply required
HOST Interface USB 2.0 compliant (Support Hi Speed) USB 1.1 compatible
ESD protection ESD_11kV
HOST Connector Standard Type mini-B Female  
Processor FT4232H FTDI
Isolation Method Bus Isolation  
Isolation Protection 2500VDC Designed value
I/O Interface RS232C ESD protection ESD_15kV
Number of RS232C Port 4  
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 2048 bytes/ch  
FIFO TX Buffer Size 2048 bytes/ch  
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. 300 [g] Only main body
Dimensions 165 x 80.5 x 39 [mm]
(6.496" x 3.169" x 1.535")
Without projections

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

RS232C Connector pinouts

Pin No Name Direction Notes
1 NC - Unused
2 RXD IN Receive data
3 TXD OUT Transmit data
4 NC - Unused
5 GND - Signal ground
6 NC - Unused
7 RTS OUT Request to send
8 CTS IN Clear to send
9 (5V) - Optional 5V
CASE FG - Connected to GND

Package Contents

  • USB-033
  • USB mini-B cable 1.0 [m]
  • Driver & Application CD

Price and Optional Accessories

Description MODEL Image List Price (JPY) Stock Status
4 Channel RS232C/USB Converter
(Independent Isolation Type)
USB-033 USB-033
Attachment for vertical direction
ACC-027 ACC-027
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
Page top
© HuMANDATA LTD. - Altera & Xilinx FPGA Boards manufacturer in Japan - 2016