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Need 2p connector with switch contacts
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iXod:
I have a project to add a footswitch to a machine. The connector for the footswitch needs to disconnect the normal front-panel switch and also switch another separate circuit.

So a 2-pole plug and a 2-pole jack that can switch 2 circuits. 1 circuit can be one of the plug’s poles. The other switch circuit needs to be isolated. Both circuits are 24vdc, low mA circuits.

What comes to mind is a 1/4” audio headphone jack that switches the audio normally going to a speaker. But not a 1/4” audio jack. (c;

Suggestions?

Thanks.
FenTiger:
Can you use a 4 pole plug, with two poles for the footswitch and the other two shorted together?

Then the shorted contacts can operate a relay inside the machine and switch whatever you like.
iXod:
OK, thank you for that suggestion. I'll go with it. 4-pole, 2 dedicated to switching a relay.

Any recommendations for a 4-pin plug that isn't a threaded (MIL-type) connector? I keep going back to the 1/4" phono plug because it goes in deep and won't fall out and it's not a screw-in type. Of course this plug won't work here, but any such alternatives that are "deep" (actually go past the panel in this fashion)?

Thanks.
themadhippy:
What you got against the common ole garden jack plug?For years they were used to shove  more than 24v and a few mill amps up speakers.There are 4 pole variants (nato 671),if however both foot switches could share a common wire you could get away with the more standard 3pole device. 
FenTiger:
I'm a fan of these Mini XLRs.

I'm not sure they'd be the best idea for a footswitch though. What happens if (when) the user accidentally treads on the cable? I think the common jack plug might handle this better.

Do you need all 4 poles? If one side of the switch is grounded or powered, maybe you can combine it with one of the relay poles and get away with only 3.
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