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USB One channel

 USB One Channel Relay


USB Relay


A general purpose Relay board for connection to a PC's USB port using VCP (Virtual COM port).
Control devices using your PC.

For 12V/24V DC 15A or 120V/220V AC at 10A max.

Complete including :
- One USB relay board

Dimensions (PCB board) :
90 mm / 35 mm

Relay datasheed :

Drivers :
Are available to work with the following operating systems :
Windows Server 2008 R2
Windows 7
Windows 7 x64
Windows Server 2008
Windows Server 2008 x64
Windows Vista
Windows Vista x64
Windows Server 2003
Windows Server 2003 x64
Windows XP
Windows XP x64
Windows 2000
Windows ME
Windows 98
Mac OS X
Mac OS 9
Mac OS 8
Windows CE.NET (Version 4.2 and greater)

Communication Parameters :
8 Data, 1 Stop, No Parity
Baud rate : 9600

Commands :
“FF 01 00” (HEX) or “255 1 0” (DEC) - OFF command
“FF 01 01” (HEX) or “255 1 1” (DEC) - ON command
“FF 01 03” (HEX) or “255 1 3” (DEC) - Status request
NOTE : Each command consists in 3 binary bytes (shown in hexadecimal below) without any space!


Drivers' installation :

You have to download the drivers from FTDI website -

Unzip it to your own folder.

FTDI Drivers

When you connect the USB board, the following message appears: FOUND NEW HARDWARE and drives need to be installed.
The red and green LED flashes 2,3 times and turn off. When the red LED and the green LED flashes means that there is a communication between the USB relay and PC.

FTDI Drivers

FTDI Drivers

FTDI Drivers

FTDI Drivers

FTDI Drivers


After the drivers' installed, an additional COM port appears in the Device Manager of Windows - usually it is COM3:

Virtual COM Port Settings

Virtual COM Port Settings

Virtual COM Port Settings



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