Connects 68-pin SCSI device to SCSI host adapter through 50-pin cable
Based on reverse engineered schematic for the HP/Agilent 5182-4551 50-pin to 68-pin SCSI adapter
Uses 68-pin male IDC SCSI connector (removed from SCSI ribbon cable) soldered to PCB
Due to short length of IDC pins, PCB thickness should be thin (0.031" or so)
Note that the upper 8-bits and its parity bit are tied together and pulled up to TERMPWR with a 4.7K ohm (0805) resistor (others adapters do this differently, such as tying to GND, which I believe causes compatibility issues).
Also note that common pins (such as GND) aren't tied together. Presumably this is to support both single ended and (HV) differential. High voltage differential has a slightly different pinout (in addition to being differential), but it looks like this adapter would support both HVD and SE. I don't believe a 50-pin LVD standard was ever used (though based on the pinout similarities of the 68-pin side, it should work if there is). This adapter should work to connect a 68-pin Multimode Single Ended (MSE) device to a 50-pin SE host adapter cable.
Tested with AEC-7722 on Agilent 16702B
Shown connected to AEC-7722
With vertical 50-pin connector:
With right angle 50-pin connector:
IDC connector after removal from cable:
