The F8650X  collector open circuit output is a+V high level. When the output OUT terminal is connected to the PLC input, the current flows in from the input terminal of the PLC and out from the common terminal of the PLC. This is the form of the source type circuit of the PLC, that is, the PNP collector open circuit output can only be connected to the source type or mixed type input circuit form of the PLC. The connection diagram is shown in Figure 11

It is precisely because of the diversity of F8650X  input module circuit forms and external sensor output signals that we need to fully understand the type of PLC input circuit and the form of sensor output signals before wiring the PLC input module. Only in this way can we ensure that the PLC input module wiring is correct and lay a good foundation for subsequent PLC programming and debugging work.