Column count is simply starting at the bottom of the row on the right (female) on the left (male) and count up to the top. You then pick up the count at the bottom of the next row to the left/right and count to the top again. The pattern shown is for a 50 pos. connector but smaller D-Sub connectors will have only two columns but the pattern remains the same. This is column count.
The different families of Cirris adapters that have this counting pattern are listed here.
- A8MM
- ABRM / HBRM – ABRF / - HBRF
- ARMG / HRMG – ARFG / HRFG
- AD5P - AD5S
- ADBP / HDBP – ADBS / HDBS
- ADPG / HDPG – ADSG / HDSG
- AMDP / HMDP – AMDS / HMDS
- AMPG / HMPG – AMSG / AMSG
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Two-row connector blocks are ubiquitous in small-run and hobbyist PCB designs. Pitches of 0.1" or 2mm are the most common, and there are all sorts of options for board-to-board or board-to-wire connectors. The problem is that pin numbering schemes vary wildly.
Pin numbering schemes I've seen include:
In my experience, getting the pin numbers wrong is one of the most common sources of PCB heartbreak. I've done a lot of wire patching to correct 6-pin header layout mistakes... and I've thrown away boards with 70-pin header errors.
My question is: Are there industry standard terms for these (or other) 2-row pin numbering schemes?
I would love to have a short, reliable way to specify these schemes, to allow saying things like "We're using a 14-pin 0.1" header with zig-zag numbering" (or whatever).
Although standardized names with the broadest possible user base are (obviously) better, I realize that there probably isn't one true answer to this question. I'd appreciate answers about how these schemes are named even within smaller subsets of the industry, as long as you're clear about the scope of use (e.g. "At company X we always called the second scheme 'shoelacing'").