@6C69.ADF - OPTO 22 AC33 PAMUX 4 Adapter
AC33 PAMUX Bus Adapter For Micro Channel Computers
J1 - 50 pin male header.
The AC33 interfaces to a PAMUX network. Each AC33 can drive up to 512
digital I/O points, 512 analog I/O points, or a combination thereof over a
total distance of 500 feet.