UW-SCSI devices can generally be used on old 50-pin SCSI interfaces with the proper adapters, but I've never seen it tried with one of these ACARD devices. I'd give it a shot if I had one lying around.
Connected to my Cyberstorm PPC SCSI is:
IDE DRIVE connected to ACARD 7720UW (terminated) --> Yamaha 50 PIN SCSI CDRW with (68-50 pin adapter) --> CS PPC SCSI <-- Active Terminator.
At least that configuration works.
