USB to RS232 Adapter 4-port


Model: UMC-104
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If you need four individual serial RS232 ports connected to your computer via one USB port then this 4-port USB to serial hub is what you need.

Once the drivers are installed it will create four individual virtual COM ports which will show up in your computer's Device Manager, each with its own COM port number. You can then use each port as if it was a single standard built-in COM port. The included driver software will let you change the COM port numbers and several other port settings such as baud rate, data bits and stop bits.

This 4-port USB to serial adapter is designed with the high performance FTDI FT232RL processor chip and drivers which ensure compatibility with all versions of Windows, Linux and Mac and also supports the majority of serial devices on the market.

Each COM port has protection against static electricity for up to 15KV so you can use this unit with most laboratory, commercial and consumer products and applications without the need for additional electrical protection. For industrial applications and devices sensitive static electricity and high voltage spikes we recommend using one of our optically isolated USB to serial adapters.

Overall features
  • Four individual COM ports
  • Easy installation
  • USB cable included
  • High performance chipset
  • Compatible with all operating systems
  • Port-powered from USB bus
  • Supports most serial devices
  • Indication lights for all 4 COM ports

Model number UMC-104
Recommended operating system
  • Windows 10 32/64, Windows 8 32/64, Windows 7 32/64, Vista 32/64, XP 32/64, Server 2003/8R2 32/64, 2000, ME, 98Se
  • Linux
  • Mac OS 8, OS 9, OS X
  • Windows CE.NET (Version 4.2 and greater)
  • Android
Processor FTDI FT232RL
Baud rate 300-921.600bps, auto detection
Power Port powered from USB port
RS232 interface DB9 male connector x 4
USB interface Female type B
Power on pin 9 No
Parity None, Odd, Even, Mark, Space
Data bits 7, 8
Stop Bits 1, 2
Flow Control None, Xon/Xoff, Hardware
Indication LEDs TX, RX and Power
Buffer size 128/385 Bytes
RS232 output power 8.0VDC per port
Serial signals DCD, RXD, TXD, DTR, GND, DSR, RTS, CTS, RI
USB signals VCC, DATA+, DATA-, GND, FG
Flow control Automatic. No IRQ Conflicts, no IRQs, IO or DMA required
Housing Aluminum with plastic sides
Current draw
Less than100mA
ESD static protection 15KV / 600W/ms
Standards EIA/TIA RS-232C, USB: v1.0, 1.1, 2.0
Operating humidity 5% To 95% - No Condensation
Operating Temp. -10°C to 60°C
Certifications CE, FCC, RoHS
Warranty 2-year Limited Warranty
ECCN 4A994.a
Schedule B 8471.80.1000
HTS 8517.18.0050
Useful accessories
serial accessories

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