2-wire DC 24V Inductive Proximity switch??

[drspanda]

Dear All,

I am using PNP 3-wire DC 24V Inductive Proximity switch and now I need 2-wire DC 24V Inductive Proximity switch. I doubt whether it will be available or not.

My PLC is AB with sinking input type...I mean positive 24V goes to the field and comes back to Input card.

I may be helped.

 

[kamenges]

http://www.turck-usa.com/Products/Sensors/Inductive/Barrel_Sensors/Barrel_with_Quick_Disconnect/Barrel_with_Quick_Disconnect_2-wire_DC.htm

 

[Singapore_Mats]

pepperl & Fuchs have many:

http://www.pepperl-fuchs.com/selector/gui/show_article_list.kly?listuserliststart=1

 

[Pierre]

Dear All,

I am using PNP 3-wire DC 24V Inductive Proximity switch and now I need 2-wire DC 24V Inductive Proximity switch. I doubt whether it will be available or not.

My PLC is AB with sinking input type...I mean positive 24V goes to the field and comes back to Input card.

I may be helped.

Heads up alert!

Your 2 wires will leak and your PLC input will always be energised... unless you add a load to common between the IO and the device.

 

[nonuke]

Siemens, Omron, Sick, Carlo Gavazzi etc. etc. also have them.

 

[chud]

Heads up alert!

Your 2 wires will leak and your PLC input will always be energised... unless you add a load to common between the IO and the device.

Correct. Man this gave me headaches one day. Use a interface relay or something

 

[drspanda]

Thank You...

thank you very much...

Also thanks for sharing the upcomming problem of leakage.

 

[escoplcguy]

Heads up alert!

Your 2 wires will leak and your PLC input will always be energised... unless you add a load to common between the IO and the device.

I am having this problem now. I have a prox switch going to a wago IO system. Blue wire connected to 24v common brown wire connected to 24v input card. trigger the prox and red light turns on and i get a 1. pull the trigger off and red light turns off, i still get a 1. where does the load come from, can anyone provide me with a wire diagram?? what is the load exactly I'm getting confused. So used to 3 wire switches.

 

[Ken Roach]

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