I have a VI written to control some 5V devices (solenoid valves) using port write. I am using a PCI-2025E card. This worked fine on DI0 (the digital I/O port available on positions 1-50), but when I switch to digital port A (on position 51-100 of the card) with the same devices, I don't get enough voltage out of the card to power on the valve (reads 1V instead of 5V across the device when the power to that channel is on). The same thing happens with digital ports B & C. When I run the Test Panel in MAX for ports A, B or C set as output, I get the error code "10613". Is there something different about ports A B C from DI0 (port O)?Is there some diagnostic I can run to test the PCI-2025E? (The computer it's in is not network-connected.)Thanks.

Multifunction DAQ

problem writing to Port A, B, C on PCI-2025E

Thanks for the diagram. This is correct. So if you use the +5V supply on the board to drive the relays, you have up to 1 Amp available. At 10 mA per relay, you will be well below that.

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Multifunction DAQ

problem writing to Port A, B, C on PCI-2025E

Re: problem writing to Port A, B, C on PCI-2025E