I wonder of anyone here may be able to help. I've been looking for some time now for a replacement for an old (c. 1980s or early 1990s) PCB module connector. I'm looking for anything similar in order to connect these modules to the PCB. I've tried looking for the part no. and also tried image searching. What I am trying to do is connect these modules to updated and modified PCBs, but to do that I need to find a similar connector type.

PCB module connector

The actual connector.

Opto-isolator Module

The module.

Connector terminal Block

Detail of connector showing terminal block.

If anyone can help me identify and find a replacement for this connector, I should be very grateful. Many thanks!


closed as off-topic by Leon Heller, Ricardo, Matt Young, Vladimir Cravero, Nick Alexeev Jun 12 '15 at 15:47

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  • \$\begingroup\$ It looks proprietary. They may have used such a custom connector in part to discourage what you are trying to do. Possibly there are more markings that are hidden under the connector. \$\endgroup\$ – Spehro Pefhany Jun 11 '15 at 11:45

Are you really sure you searched for everything?

((EDIT: I do not mean to be mean there ^^, I just meant: Searching can mean a multi-stage process))

First search for "Siemens NTIO" brought this in the top 3 results.

Which then as a document name and unit descriptor has a full Siemens internal product series number (K21-06.50) and the identification of "NKOD"/"NKODH" and "NKID"/"NKIDH".

Searching for those letters and/or internal product numbers leads me toward a myriad of websites with names like "http://www.hobbielektronika.hu/", hosting PDFs about modules or connectors. This particular website seems to sell a load of stuff, but I can't read it. But if they have the PDFs, chances are they have something or will likely know (e-mail or call!) how or where to get stuff.

It does seem to be a Landis & Staefa proprietary internal type, but with 100's of websites particularly pointing at repair or hobby use, I'm betting in any corner of the world there's going to be a few. Since I don't know which languages you speak, the last half of that path is up to you.

As a first hint, these people seem reasonably professional and have a lot of stuff in similar series, they hosted a NKODH module PDF in the first search I did after the PDF, which also showed the NTIO module connected to it.

Same EDIT as above:

I also opened an RS-Online which came up in the search, they have a lot of visually similar Siemens stuff. I had a meeting so I posted before I walked all tabs. But I hate their website, so I didn't try to find anything there, but you could try to.


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