I've two of the 10meg boxes, complete with 100
disks, but no controller card.
From what I understand, it was a proprietary interface.
I believe that the Bernoulli drives used a proprietary interface at
least up until the 20meg 5-1/4" drives. They even produced a controller for
the TRS-80 Model 2000 but the software didn't allow full use of anything
larger than 10meg.
Jeff