What is the voltage of your solenoids? The SSC-32 can handle TTL output voltages. I’m guessing your solenoids are 24v or higher, now if this is true you will need a relay to drive your solenoids. I have done this before, I used VSA for the control software, the SSC-32, some TTL level board relays, which didn’t work out for me they weren’t fast enough for what I wanted them to do, and so I switched to SSR’s for my servopneumatic solenoids. You can get the TTL relays on EBay real cheap; I got 50 of them for $10.00. The relays were rated at 5v on the coil, 24v 2 amps on the contacts.