Generic LJ8A3-2-Z/BY Inductive Proximity Sensor PNP NO, DC 6–36V, 2mm Range, IP65

This LJ8A3 model features a PNP (sourcing) output. When a metal target is detected within the 2mm range, the output switch closes internally to connect the signal line to the positive supply voltage (+V). This PNP configuration is typically used to directly drive PLC inputs or relays connected to common negative (0V). It is the opposite of an NPN (sinking) output, which connects the signal to ground when activated.

The sensor's PNP output transistor can handle a maximum continuous load current of 300mA. This is sufficient to directly drive small relays, indicator lamps, or PLC digital inputs. Ensure your connected load does not exceed this current rating and that the supply voltage remains within the 6–36V DC operating range to prevent damage to the output circuit.

Mount the sensor securely so the ABS sensing face is parallel to the target metal surface. The nominal sensing distance is 2mm, but for reliable operation, set the actual gap between 0mm and 1.6mm (the setting distance). This accounts for manufacturing tolerances and ensures stable switching. The sensor has no moving parts and requires no physical contact, but metallic objects in the background beyond the rated distance should be avoided to prevent false triggering.

Yes, standard inductive proximity sensors like the LJ8A3 series detect all conductive metals, including non-ferrous types like aluminum, brass, and copper. However, the effective sensing distance may be reduced compared to ferrous steel targets due to lower conductivity and permeability. It is recommended to test with the actual target material and adjust the mounting gap within the 0–1.6mm setting distance for reliable detection.