Thankyou for enlightening me, I would prefer to have all inputs the same way as well, I suppose I could use NPN's and positive common to the push buttons, I would prefer the other way though. I have searched the vendors store for "PNP" & "Proximity" separately, and can't find any PNP proxys from...
I have searched online and found a manual for this controller here
http://www.gavazzionline.com/pdf/K120UserManual.pdf
and on page 75 of the pdf is says this
3) Input wiring
Main unit’s wiring method is as follows. DC input specifications offered by MASTER-K120S is to be used for both electric...
Thanks for that, I expected the PNP would be the go, but the brain has faded too much over the years............., I haven't purchased anything yet.
This is the sensor I am trying to use, it is NPN
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=260442027793
However I have searched and...
I have been given the task to buy an LG PLC (K120s)20 to 40 I/O, I need to input some proximity switches, do I use PNP or NPN, I want to use the inbuilt 200ma 24v power supply, I'm getting old and have forgotten all I knew about transistors as I haven't done a lot with them, I can plod my way...
