The Pepperl+Fuchs NJ2-11-N-G-Y129365, also cataloged as the NJ2-11-N Inductive Sensor, operates as a dedicated hardware component for non-contact metallic target detection within NAMUR intrinsically safe control loops.

Model Suffix & Variant Decoding

• NJ: Series designation for inductive proximity sensors.
• 2: Standard rated operating distance of 2 mm.
• 11: Cylindrical smooth housing outer diameter in mm.
• N: NAMUR output current switching logic (DIN EN 60947-5-6 execution).
• G: Stainless steel housing material specification.
• Y129365: Factory-assigned special customer/pinout revision identifier.

Technical Parameters

Barrier Interface and Intrinsically Safe Operational Compliance

Operating in conjunction with intrinsically safety (Ex i) barriers, the sensor limits electrical energy dissipation below thermal ignition thresholds in explosive atmospheres. Robust housing engineering ensures high DIN-rail mounting stability for accompanying isolators, keeping surge voltage protection limits intact while delivering negligible protocol conversion latencies across field discrete signal loops.

Deliverable Package Breakdown

• 1 x Pepperl+Fuchs NJ2-11-N-G-Y129365 Inductive Sensor Assembly
• 1 x Stainless Steel Mounting Clip Set
• 1 x Installation Manual Sheet

Field Assembly & Wiring Directives

Mechanical Positioning

Mount the cylindrical sensor flush into non-magnetic metal mounting brackets. Maintain minimum clearing distances around the active sensing face to prevent lateral target pre-actuation.

Signal Line Termination

Connect the 2-conductor cable to blue intrinsically safe switch amplifier terminals. Observe polarity rules according to NAMUR 2-wire current loop standards.

Shield Bonding Protocols

Run sensor leads through dedicated cable trays separated from high-voltage AC motor wires. Terminate cable shielding at the safe area barrier enclosure earth bus.

Technical FAQ

• What output signal state does the sensor generate when a metal target approaches?

  Current consumption drops below 1 mA when a target enters the 2 mm sensing range and rises above 3 mA when clear.

• Is a direct connection to a standard 24 VDC PLC discrete input card supported?

  Direct 24 VDC connection is prohibited; the sensor requires a dedicated NAMUR switch amplifier or isolated barrier.

• Can the sensor body be installed fully flush within steel mounting plates?

  The sensor body allows flush installation without degradation of the nominal 2 mm switching distance.

• What thermal operating bounds apply to this sensor variant?

  The hardware operates continuously across ambient environment temperatures ranging from -25 to 100 deg C.

• What protection mechanism prevents ignition in hazardous process locations?

  Low operating voltage and current levels allow integration with approved Ex i barriers to constrain spark energy.

• How should line fault detection be configured on the host switch amplifier?

  Configure the switch amplifier to monitor loop current limits (<0.2 mA for wire break, >6 mA for short circuit).

• Does the sensor housing material resist corrosive chemical exposure?

  The stainless steel housing construction provides high mechanical durability and resistance against chemical exposure.

• What cable routing precautions must be followed to avoid signal interference?

  Route NAMUR sensor cables independently of power circuits and bond cable shields to safe-area earth points only.