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I want to make a relay output to be configurable by the client as NO/NC or guarded by resistors (10k opened, 1k closed).

A solution I have been thinking about uses resistors that can be placed like a jumper on a pin header, like this:

enter image description here A quick search for existence of this jumper type yielded nothing. Does anyone know if this is an actually available component? Any other (albeit simple for untrained end users) solutions are welcomed.

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    \$\begingroup\$ Couldn't you just put a resistor inline with the header, and then use a jumper to connect this resistor to the relay output? Why does the resistor itself need to be placed like a jumper? \$\endgroup\$ Commented Jan 15, 2021 at 11:53
  • \$\begingroup\$ @Doodle, the relay output must be configurable between normally opened/normally closed or 10k/1k. To change it to normally opened/normally closed, the 1k resistor needs to be exchanged (shorted) with a "real" jumper and the 10k resistor removed. I hope you get the idea. \$\endgroup\$ Commented Jan 15, 2021 at 11:58
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    \$\begingroup\$ Why the complication (and it is a serious complication) when you can use simple user-selectable jumpers to achieve what you want. \$\endgroup\$ Commented Jan 15, 2021 at 12:02
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    \$\begingroup\$ Even if you use jumpers, those will be misplaced and disappear 15 minutes after the box is opened. I would recommend DIP switches. \$\endgroup\$ Commented Jan 15, 2021 at 12:52
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    \$\begingroup\$ @Bart As this is configurable by the client they need to manage these special jumpers, and they will loose them very quickly. \$\endgroup\$ Commented Jan 15, 2021 at 13:28

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You can use 3-way headers instead of 2-ways for the jumpers. That way, you can shift the jumper by 1 position to the Resistive Protection position.

enter image description here

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  • \$\begingroup\$ We will take this one in consideration. Two extra pins might be acceptable. \$\endgroup\$ Commented Jan 15, 2021 at 14:08
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    \$\begingroup\$ In my experience, using "special" components tends to lead to complications down the line, usually with supply. \$\endgroup\$ Commented Jan 15, 2021 at 14:10
  • \$\begingroup\$ Maybe the competitors have them specially made, so the client has to turn to them when the jumpers get lost. Vendor lock-in is not our policy, so we will not even consider that. \$\endgroup\$ Commented Jan 15, 2021 at 14:15
  • \$\begingroup\$ This is the approach that we had in mind too. We will go with this one. Interesting detail is that the competitor uses indeed a kind of resistor with the form factor of a jumper, probably custom made, and maybe even by themselves. \$\endgroup\$ Commented Jan 19, 2021 at 10:40

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