BlogMemo: PNP and NPN wiring difference of proximity sensors
| You should remember this. Making connection mistakes between PNP and NPN is very common.
The output type will differ depending on the sensor contactor, whether it is NO (normally open) or NC (or normally closed). PNP sensor is the most common. The load (for instance, a PLC input), is connected between 0 and the output. The power supply is +24V (for instance). |
