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Joined: May 2006
I have one called 'Maxum HP-IL converter' made by Federal Products corp., a measurement instruments company which is a division of Esterline, which is an aerospace company. I also can't find any specific information on it. What does yours look like? Mine is enclosed in a heavy gauge steel box meausuring 3 1/8" X 6 5/8" X 1 3/16"(8cm X 17cm X 3cm) with a baked on two tone gray finish and a 6 pin data cable, a three pin 'remote switch' connector and a 4 pin power connector.
there are four screw-mounted rubber feet on the bottom and a single red LED on the top. My theory is that these were made by several companies in the 1980's either as 'in-house second sources' to the HP product or as 'ruggedized' versions for the industrial market. Either way, it was never a mainstream product and it is now a technological artifact so digging up specifics will probably be difficult. I think the best way to proceed is to get the documentation for the HP product and try to derive the rest from there.