USB-RLY04 - 4 x 16A USB relay

Powered and Controlled from the USB bus.

• Number of Relay's - 4 with integrated snubbing of the normally open terminals
• Power - Powered from standard USB bus
• Control interface - USB with a mini B connector
• Relay current - Up to 16Amp @24vdc or 250vac
• Connections - Screw Terminals for N/O N/C and Common contacts.

Snubbers

Integrated snubbers have be added to the module between the common and normally open poles. When inductive loads are to be used the snubbers suppress the switching spikes and relay arc associated with such loads. We have a Simple guide here

Full USB-RLY04 Documentation

Examples:

Linux: Linux GCC - A command line tool that will set the relay states according to input from the user

Mac: Xcode - Simple example of switching the relays

Microsoft Windows:

• Visual C# Express - Simple example of switching the relays
• Visual Basic Express - Simple example of switching the relays