It is a long shot, but ya never know what someone might have in a stack of old stuff..
403628 is the interface from +/-6v MIL-STD signalling to Model 40 TEMPEST equipment.
It has
303180 and 303181
PC cards to drive/receive optoisolators in the TEMPEST controller.
I'd like to find a schematic for those cards. The cards are also used in the 405932 EIA interface version. Or an actual 303180 or 303181 card - I can always reverse engineer a diagram.
The wiring diagram package for the interface is WDP0457.
Cheers,
