Generic LJ5A3-1-Z/BX Inductive Proximity Sensor, NPN NO, 10–30VDC, 1mm Detection Range, IP65

The sensor has three wires: Brown (VDC+), Blue (VDC- / GND), and Black (Signal Output). For an NPN NO output, the Black wire is an open-collector output. Connect the load (e.g., a PLC input or relay coil) between the Black wire and the positive supply (Brown). When a metal target is detected, the NPN transistor sinks current, closing the circuit between Black and Blue (GND).

Yes, inductive sensors detect all conductive metals, but the effective sensing distance is reduced for non-ferrous metals. For this LJ5A3 model with a nominal 1mm range for steel, the sensing distance for aluminum is typically 30-40% shorter (approx. 0.6-0.7mm). Always verify detection in your specific application with the actual target material.

Standard inductive sensors in this class typically have a response frequency of up to 1 kHz, corresponding to a response time of less than 1 ms. This allows for high-speed counting or position detection applications. The exact specification should be confirmed via the sensor's datasheet for precision timing requirements.

Yes, the shielded (flush-mountable) design of the LJ5A3 series minimizes the electromagnetic field spread, allowing for closer side-by-side mounting. A minimum spacing of one sensor diameter is generally recommended to prevent mutual interference. Always perform a functional test with all sensors powered and targets present.