Using Arduino to send Signal to PLC (Allen Bradley MicroLogix 1500)

[alto777]

@vicre23

What would you recommend?

If sinking works, it would be the easiest circuit on the Arduino side.

See the circuits on this thread. Just remove the load and the diode:

MOSFET low-side/high-side drivers ... have I got this right?

I'm trying to get further down the path of making something Really Useful. I want to check with you circuit experts whether I am on the right track with MOSFET drivers. After doing some research this appears to be a reasonable circuit for an N-channel MOSFET driver. But is it? [image] And for a P-channel MOSFET, this one? [image] Do the circuits look reasonable? The resistor values? The whole concept?

Note the use of a "logic level" MOSFET. This is so the 5 volt output of the Arduino will def turn it fully on.

HTH

a7