Numato Lab 32 Channel USB Relay Module is great for controlling your devices through USB without any USB protocol knowledge. This module plugs into your design seamless. Individual relay can be controlled by simple commands. Numato's URMC32 32 Channel USB Relay Module provides exceptional value for money. It has thirty-two onboard 12V/ 24V DC relays that can switch up to 7A load. The relays and GPIOs can be controlled and read status by simple commands. The board, when attached to a PC/Laptop shows up as a serial port and all you need to control the board is a serial terminal application like HyperTerminal or Putty. This board can easily be controlled by writing a simple serial port application in VC++, VB, VBA (Word, Excel, etc), Perl, Python, etc.
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