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USB to Serial Adapter, 4-ports, Industrial

  • Model: USC-UR204
  • In Stock


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Here is a 4-port USB to RS232 converter which can be used as a desktop converter but it also has brackets included for wall and DIN installation. The enclosure is made of metal and it has 15KV ESD protection against static electricity and voltage surges, so it is an ideal solution for most applications including office, commercial, laboratory and even light industrial environments.

All four RS232 serial ports can be used individually since the drivers and operating system will assign four unique serial COM ports for the converter. Each port can send and receive data without interference from the other port.
Drivers are downloadable for free from our website and easily installed by clicking an auto-installer file. The drivers will create four virtual COM ports which will show up in your operating system's Device Manager.

This USB to serial RS232 converter is powered through the USB port, however external 5VDC can be applied through a standard barrel connector if your application draws additional amperage or if you are connecting through a USB hub which doesn't provide sufficient power.
LED indication lights indicates when data is sent and received and when the converter is powered on.

The converter is built around the high-performance and reliable FT4232HL chipset from FTDI Semiconductors which makes it fully compatible with most operating systems, including Windows, Linux and Mac (32/64-bit).

Overall features
  • Four individual RS232 ports
  • Industrial grade
  • DIN-rail mountable
  • Wall mountable
  • USB port powered
  • Optional external power
  • TX, RX, PWR status lights
  • Easy driver installation
Included items

  • 1 x Converter
  • 1 x USB cable
  • DIN mount kit
  • Wall mount kit
  • Mounting screws
  • Screw terminal

Useful optional accessories
(not included)

Null modem adapter
Null modem adapter

DB9 to RJ45 adapter
DB9 - RJ45 adapter

DB9 gender changer
Gender Changer

Part number USC-UR204
Operating system
  • Windows 11, 10, 8.1, 8 (32/64-bit), Windows Server 2016, Windows Server 2012 / R2, Windows 7 (32/64-bit), Windows Server 2008 R2, Vista (32/64-bit), Windows Server 2008 (32/64-bit), XP, Windows Server 2003 (32/64-bit), 2000, (all WHQL compliant). Windows RT as D2XX drivers only.
  • Windows CE v4.2 - 5.2, 6.0, 7.0 and 2013 including: Windows Mobile 2003, 2003 SE, Windows Mobile 5, 6, 6.1 and 6.5
  • Linux (built into kernel 3.0.0-19 and above)
  • Mac OS 8, OS 9, OS X 10.3 to 10.9 and above
  • Android
Processor FT4232HL
RS232 Interface RS232 DB9 Male x 4
RS232 output power  
Cable length 75 inches / 190cm
USB interface Standard Type B Female
Indication LEDs TX, RX and Power
Ports 4-port
Signals TX, RX, RTS, CTS, DTR, DSR, RI and GND
Power on pin 9 No
Baud rate 300-921,600bps (up to 3Mbps by using alising)
Parity None, Odd, Even, Mark, Space
Data Bits 7, 8
Stop Bits 1, 2
TX / RX buffer size 128 Byte Transmit Buffer / 384 Byte Receive Buffer
Adjustable USB transfer sizes for TX and RX From 64 bytes to 4096 bytes
Adjustable latency timer 1 to 255 msec
Adjustable read and write timeouts 0 to 10000 msec
Flow Control None, Xon/Xoff, Hardware
COM port accessible by Included virtual COM port drivers or FTD2XX.DLL
Special features
Electrostatic (ESD) protection 600W surge protection, 15KV static electricity protection
Power Port powered from USB port. Optional external power (9 - 48VDC, via 3.5 x 1.3 x 7mm barrel connector, center + or screw terminal connector)
Current draw  
Housing Aluminum
Dimensions 160 x 62.5 x 23 mm
Weight 281g
Interface compliance USB1.1,2.0,3.0, EIA/TIA RS-232
Regulatory compliance FCC, CE and RoHS
Operating temp -40°C to 85°C, 5% to 85% humidity
Warranty 1 year limited warranty

For alternative USB to serial solutions please see our full selection of USB to Serial RS232 adapters


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