NXC-VAI4 card pb!!!

I don't know the nature of your solenoid(s) but I would wonder if the card has enough juice to drive them. Bear in mind that just because they worked in the past doesn't mean it will last. If you solenoids were drawing more juice than the card was rated at it translates into heat on the card's VCAs that will at some point burn out the chip. The stated max output on the card is 50mA. (that's not much at all)

They typical way solenoids are done is to use AMX Relays and then run the circuit with a stand-alone power supply beefy enough to drive the solenoids.

techniquesmethodes wrote: »

The problem came from a 24V cable that touched the metal part of the valve. The card is dead , no voltage on the OUTPUT

well, like I said before - I'd use a relay and separate power supply. This also adds the benefit of isolating the control system components from the other system. You were lucky it was just a card that burned up. It could have been much worse.