Pro-Range CLJ-C18-5APB Inductive Proximity Sensor NC PNP 5mm Detection - 18x18mm Thread

This CLJ-C18-5APB model is configured as Normally Closed (NC). In its resting state (no target present), the PNP output transistor is ON, sourcing current to the load. When a metal target enters the 5mm detection zone, the output switches OFF. This is the inverse logic of a Normally Open (NO) sensor and is chosen for fail-safe circuit designs.

The sensor is designed for a typical DC supply voltage range of 10-30V, with 24V DC being the standard in industrial PLC systems. It includes reverse polarity protection, but connecting the supply within the specified range is crucial for proper operation and to avoid damaging the internal electronics.

While inductive sensors primarily detect conductive metals, their sensitivity is significantly higher for ferrous materials like steel and iron. Detection of non-ferrous metals like aluminum or copper is possible, but the effective sensing distance will be reduced, often by 30-50%. For reliable operation, it is recommended to test with the specific target material.

The sensor has three wires: Brown (V+), Blue (V- / Ground), and Black (Signal Output). Connect Brown to your DC positive supply (10-30V), Blue to DC negative/ground. The Black wire is the PNP output; connect it to your PLC input or load, which must then be connected back to the DC negative to complete the circuit.