5 wire Photoeye

[matlark]

I have a PE with 5 wires...L1+, L1-, com, n.c., and n.o. My question is should I connect the com to the L1- terminal and then run my n.c. or n.o. to the input of the plc? (24volt PE)
thanks

 

[sfindley]

That will work if you have the (-) terminal of your input module connected to the same common as the power supply. Otherwise, you will probably need to connect the COM wire to the (-) terminal of your input module. They should have wiring diagrams in the documentation with the PE.

 

[Ned_Flanders]

I always connect the com to L+. I don't use negative logic!

 

[iant]

different PE's with 5 wires can have different uses
Lease post the switch MFG and No' next time

 

[matlark]

Its from automation direct 1451E-6514

 

[Ned_Flanders]

As your sensor has volt free contacts, you can connect the com terminal to what ever supply voltage your photocell is powering, be it an interface relay, indicator or plc input.

 

[matlark]

So if I connect the com term to the plc, what do I do with the n.c. or n.o. wiring? Connect it to the + or - of supply?

thnaks

 

[milldrone]

So if I connect the com term to the plc, what do I do with the n.c. or n.o. wiring? Connect it to the + or - of supply?

thnaks

Try this

 

[matlark]

I got it working correctly... just connected com to + and the n.o. wire to plc input. Thanks for all the replies.

 

[iant]

Hi matlark,
As you see giving the details help a lot more.
Some sensors with 5 wires - the fifth wire is tied back to change the sensor to NPN - that is why more details are always needed