Pro-Range CZJ-A18M-8APB Inductive Proximity Sensor - PNP Output, M18 Thread, 8mm Detection

The CZJ-A18M-8APB has a PNP (sourcing) output. When activated, it switches the signal line to the positive supply voltage. This is typically used with PLCs that have a common negative (sinking) input. An NPN (sinking) sensor would switch the signal to ground instead. Always verify your controller's input type for correct compatibility.

No. Inductive proximity sensors operate by detecting changes in an electromagnetic field caused by eddy currents in conductive materials. They are specifically designed to detect metals (both ferrous and non-ferrous). Non-conductive materials like plastic, wood, or glass will not be detected by this sensor type.

Connect the brown wire to the positive DC supply (10-30V), the blue wire to the negative/common (0V), and the black wire to your PLC's digital input. The sensor's PNP output will source current to the input when a target is detected. Ensure the load (your PLC input) is connected between the black wire and the negative supply to complete the circuit.

The rated 8mm distance is typically specified for a standard mild steel target. For non-ferrous metals like aluminum or copper, the effective sensing distance is reduced, often by 30-50%, due to lower conductivity and permeability. Always refer to the sensor's technical datasheet for reduction factors and perform real-world testing for critical applications.