06-04-2008 09:22 AM
06-05-2008 10:37 AM
Ruzz,
PCI-DIO-96 by default powers up with all I/O configured as inputs with an internal 100K pullup resistor. The best way to deal with this is to rewire your relays so that it takes a low output from the DIO-96 to energize them. Instead of hooking common to one side of all your relay coils, hook the positive side of power supply to one side of relay coils.
Don't forget to use snubbers across the relay coils to protect the DIO.
06-06-2008 01:41 AM