Looking for keyed card edge connector

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Hi - I am trying to resurrect a Kepco BOP 100-1M power supply. Unfortunately, I've found that it is missing a part - they call it the "Kepco BOP-15" but all it is is a 50 position (2x25) 100 mil pitch edge connector wired up in a specific way. They charge $90 for it, so I'm thinking I'll just make my own.

I've found some parts that will work (planning on Digi-Key part number A31718-ND right now). But none of them are keyed. The connector on the Kepco power supply is keyed so that it has a 2x8 section and a 2x17 section.

Currently I'm planning on just hacking in my own key with some epoxy or something, but I'd prefer to have a proper connector. Anybody know of anywhere that would have them? I don't see any on Digi-Key.

On a side note - this should be a pretty cool device once I get it operational. It has a single output that can go from -100V to +100V, and it can sink or source up to an amp regardless of the output voltage. They call it a four quadrant supply.

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Typically these connectors are provided with a slot in between positions, allowing you to key it yourself. Look at the drawing for this connector, you will see a note about it... "Inter-Contact Keying Slot"

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mikericetga wrote:
Typically these connectors are provided with a slot in between positions, allowing you to key it yourself. Look at the drawing for this connector, you will see a note about it... "Inter-Contact Keying Slot"

So you're saying they're designed for you to add in some sort of keying feature inside the connector? I had been planning on just epoxying in a piece of plastic or something, but if there is a part designed for this purpose that'd definitely be interesting...

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If this is a one off, I would definitely go with epoxy.

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Back in the day I used a lot of Cinch 2x50x.1" card edge connectors. The 'key' was a thin sliver of glass-epoxy that could be slid into grooves molded between each contact position. Surely these things are still available.

Tom Pappano
Tulsa, Oklahoma