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Author Topic: Help wiring limit switch to servo tec board  (Read 356 times)

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Offline reuelt

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Re: Help wiring limit switch to servo tec board
« Reply #10 on: May 10, 2019, 12:56:09 AM »
When I tried to wire two switches I can’t get them both to work on the same input, only one.  I tried every combo in all the posts I found.  How should pnp’s be wired so each can trip independently?
You may need have an "EXCLUSIVE-OR" IC on a PCB.

Or buy EX-OR Module to test first (see attached)
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Offline TPS

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Re: Help wiring limit switch to servo tec board
« Reply #11 on: May 10, 2019, 02:36:09 AM »
normaly your Limit Switches have three wires:
Brown -> 24v
blue -> 0V
black -> Output

so if you want two (NC) Switches in series you have to wire:

Switch 1
Brown -> 24v
blue -> 0V
black -> to Brown of Switch 1

Switch 2
Brown -> from black of Switch 1
blue -> 0V
black -> to input



anything is possible, just try it.
if you find some mistakes, in my bad bavarian english,they are yours.

Offline reuelt

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Re: Help wiring limit switch to servo tec board
« Reply #12 on: May 10, 2019, 09:41:49 AM »
normaly your Limit Switches have three wires:
Brown -> 24v
blue -> 0V
black -> Output

so if you want two (NC) Switches in series you have to wire:

Switch 1
Brown -> 24v
blue -> 0V
black -> to Brown of Switch 1

Switch 2
Brown -> from black of Switch 1
blue -> 0V
black -> to input





He has an indu
normaly your Limit Switches have three wires:
Brown -> 24v
blue -> 0V
black -> Output

so if you want two (NC) Switches in series you have to wire:

Switch 1
Brown -> 24v
blue -> 0V
black -> to Brown of Switch 1

Switch 2
Brown -> from black of Switch 1
blue -> 0V
black -> to input





He is using semiconductor (non-contact) sensors and not mechanical switches.
I do not think you can connect those electronic PNP sensors in series and in NC mode. I may be wrong.
"the gift of God is eternal life through Jesus Christ our Lord"