NPN to PNP and vice versa

zgozvrm

Joined Oct 24, 2009
115
The way I do it is to use a pull-up or pull-down resistor and invert the logic in the plc program. This only requires a single resistor. I use a 1.5KΩ to 2KΩ, 1/2 W resistor.

This is much simpler and only requires a single added component.
 
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