A general purpose Relay board for connection to a PC's USB port using VCP (Virtual COM port). Control devices using your PC. USB Relay controller allows a PC to control external devices using simple RS232 commands. Relay is fully powered from the USB bus.

Manufacturer:
KMtronic LTD

Complete including:
One USB relay board

Dimensions:
KMTronic_8Relay_Dimension.pdf

Relay specifications:
Relays have Normally Open (NO) and
Normally Closed (NC) Contacts each capable
of switching max:
- 12VDC/15A
- 24VDC/15A
- 125VAC/15A
- 250VAC/10A

Relay datasheed:
www.info.kmtronic.com/manuals/RAS.pdf

Supply:
Required power 12VDC/1000mA

Operation Range:
0°C to +80°C

Drivers :
Are available to work with the following operating systems :
All Windows systems, Linux, Mac OS X, Mac OS 9, Mac OS 8,
Windows CE.NET (Version 4.2 and greater), Raspberry Pi, Arduino ADK, Arduino with USB Host Shield

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

Commands:
FIRST chanel commands:
OFF command : FF 01 00 (HEX) or 255 1 0 (DEC)
ON command : FF 01 01 (HEX) or 255 1 1 (DEC)
...
...
...
EIGHT chanel commands:
OFF command : FF 08 00 (HEX) or 255 8 0 (DEC)
ON command : FF 08 01 (HEX) or 255 8 1 (DEC)
NOTE : Each command consists in 3 binary bytes (shown in hexadecimal below) without any space!

Software Examples:
http://www.info.kmtronic.com/usb-rs232-rs485-relays.html

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