Pro-Range CZJ-A18M-8ANA NPN M18 Inductive Proximity Sensor - 8mm Detection

The CZJ-A18M-8ANA has an NPN (sinking) output. When activated, the output pin switches to connect to 0V (ground), sinking current to complete a circuit. This is typically wired to a PLC's digital input configured for sinking, or to a microcontroller with an external pull-up resistor to the positive supply. PNP (sourcing) outputs, in contrast, switch the positive voltage to the load.

No. Inductive proximity sensors operate by detecting changes in an electromagnetic field caused by eddy currents induced in conductive materials. They are specifically designed to detect metals, including steel, aluminum, and copper. Non-conductive materials like plastic, wood, or glass will not be detected.

Connect the brown wire to the positive DC supply voltage (10-30V), and the blue wire to the DC common (0V). The black wire is the NPN switched output. Connect one side of your load (e.g., a PLC input or relay coil) to the positive supply, and the other side to the black sensor output wire. When a target is detected, the black wire sinks current to ground, activating the load.

This sensor is designed for a wide operating voltage range of 10 to 30 Volts DC, making it compatible with standard 12V and 24V industrial control systems. The current consumption is typically low, in the range of 10-20 mA when idle, with the output capable of sinking up to 200 mA for driving relays, PLC inputs, or indicator lamps.

The sensor features a standard M18 x 1 metric thread. Install it using a locknut onto a pre-drilled and tapped M18 hole in your mounting panel. Ensure the sensing face is flush with or slightly recessed from any surrounding metal surfaces to prevent false triggering. Maintain the specified lateral and frontal clearance distances (typically 1-2 times the sensor diameter) from adjacent metal structures for reliable operation.