USB-RLY02-SN - 2 x 16A USB
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Powered and Controlled by the USB bus.
Relays - 2 with integrated snubbing of the normally open terminals
Power - Powered by standard USB bus
Control interface - USB with a mini B connector
Relay current - Up to 16Amp @24vdc or 250vac
Connections - Screw Terminals for N/ON/C and Common contacts.
Snubbers
Integrated snubbers have been 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-RLY02-SN Documentation
Examples:
Linux
Linux GCC - A command line tool that will set the relay states according to input from the user
Linux with Mono and Xbuild (C# ) - Simple example of switching the relays
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