PNP NO+NC Inductive Sensor – LJ12A3-2-Z/CY Flush

The LJ12A3-2-Z/CY inductive sensor is designed for non-contact detection of metallic objects in industrial machinery, production lines and automation systems.

This model features a PNP output with NO + NC (Normally Open + Normally Closed) switching functions, operates on 6–36 VDC, and provides a nominal sensing distance of Sn: 2 mm. It has an M12 cylindrical housing and a shielded / flush mounting design.

The sensor uses a 4-wire connection:

• Brown: +VDC
• Blue: 0V / GND
• Black: NO output
• White: NC output

As a PNP sensor, the active output supplies positive voltage to the PLC digital input.

Wiring Diagram:

+6...36 VDC
    │
    └──── BROWN

0 VDC / GND
    │
    └──── BLUE

NO Output
    │
    └──── BLACK ─────> PLC Digital Input

NC Output
    │
    └──── WHITE ─────> PLC Digital Input

Main Specifications:

• Model: LJ12A3-2-Z/CY
• Type: Inductive Proximity Sensor
• Output Type: PNP
• Output Function: NO + NC
• Power Supply: 6–36 VDC
• Sensing Distance: Sn: 2 mm
• Housing Size: M12
• Installation Type: Shielded / Flush
• Number of Wires: 4
• Wire Colors: Brown, Blue, Black, White
• Detection Object: metallic objects
• LED operation indicator
• Protection Rating: IP67
• Suitable for PLC and industrial control systems

Typical Applications: metal part detection, positioning, travel limit sensing, object counting, conveyor systems, packaging machines, production machinery and PLC-based industrial automation.