52-pin D-Sub?

Nigel Johnson nw.johnson at ieee.org
Thu Feb 27 18:20:47 CST 2020

If your reference to D-sub means the connectors originally made by 
ITT-Cannon, I can offer the following from a cutout from a trade catalog 
that I have carried around these last 30 years as ammunition against 
those who erroneously use the term DB-9!

I wasn't sure, so I had to find it and can confirm that there was no 
'standard' D-sub of 52 pins in 3 rows.  The ones available were:

DA15, DB25, DC37, and DD50, that latter of which had 50 pins in three 
rows. There was of course the famously mis-labelled DE9.

Could you have mis-counted the pins?



On 27/02/2020 18:37, Adam Thornton via cctalk wrote:
> I work at an astronomy facility.  I get to do some fun dumpster diving.
> I recently have pulled out of the trash a plugboard with a male and a
> female D-Sub 52 connector.  3 rows of pins, 17-18-17.  I took the
> connectors off the board: there's nothing back there, so this thing only
> ever existed so you could plug the random cable you found into it and its
> friends to see what the cable fit.
> I can't find much evidence that a 52-pin D-Sub ever existed.
> Is this just Yet Another Physics Experiment thing where, hey, if your
> instrument already costs three million dollars, what's a couple of grand
> for machining custom connectors?  Or was it once a thing?
> (also posted to COFF)
> Adam


Nigel Johnson

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