Unknown QBUS board

Hi! A few month ago I acquired a VAXstation 3200. It runs runs very nicely with a Emulex UC08 SCSI-Controller off a 1GB full-height SCSI-Disk. There is one QBUS card in the system that I can't identify. As far as I know the VAX has been used for measurement data aquisition in a physics laboratory. The only connector to the outside is for a 40-pin ribbon cable. I got a very long (10m I guess) cable with the box so I suppose it is using some kind of differential data transmission. Unfortunately I don't know what was connected to the other end of the cable. Probably the card is useless without that second part (maybe a A/D-Converter?). The board occupies all 4 slots and is populated mostly with small ICs of the 74xxx series and some PALs. The Label says: KINETICSYSTEMS MODEL D1571 MODEL 2922-Z1B I did not find any usable information on he net. Does anyone of you know what this board does? Thanks in advance, Sebastian