Configured for non-contact metallic target detection in automated control loops, the Pepperl+Fuchs NJ2-8GM40-E2-V1 (NJ2-8GM40-E2 Inductive Sensor) provides direct physical/electrical execution.

Part Number Code Breakdown

The part number string for item number 021030 specifies exact mechanical and electrical properties:

• NJ2: Inductive proximity sensor base designator with a 2 mm rated operating distance.
• 8GM40: M8 x 1 threaded stainless steel cylindrical housing with a 40 mm overall body length.
• E2: 3-wire DC output stage configured for PNP normally open (NO) switching mode.
• V1: Integrated 4-pin M12 x 1 quick-disconnect male connector interface.

Technical Performance Parameters

Electrical Safety Limits & Surge Protection

The internal sensing circuitry implements robust surge voltage protection limits to isolate sensitive switching elements from inductive line transients and voltage spikes on supply rails. When deployed alongside intrinsic safety (Ex i) barriers in explosion-hazardous areas, signal lines maintain absolute galvanic integrity. Solid panel grounding ensures DIN-rail mounting stability for associated interface modules, preserving low conversion latencies across field wiring loops.

Package Dispatch Items

• 1 x Pepperl+Fuchs NJ2-8GM40-E2-V1 Inductive Sensor Unit
• 2 x Hexagonal Mounting Nuts (M8 Thread)
• 2 x Lock Washers

Field Wiring & Mechanical Mounting

• Mount the sensor flush within ferrous metals up to the reference sensing plane, ensuring no metal surrounds the face beyond standard flush mounting allowances.
• Tighten the M8 threaded locknuts using a standard wrench, applying a maximum tightening torque of 3 Nm to prevent thread damage.
• Align the 4-pin M12 female cordset connector with the integral V1 plug, pushing straight in before threading the metal coupling nut hand-tight.
• Connect Pin 1 to +10...30 VDC supply, Pin 3 to 0 VDC ground, and Pin 4 to the PLC discrete input channel (PNP load). Leave Pin 2 unconnected.
• Route signal cables through grounded metallic conduits to isolate sensor wires from adjacent variable frequency drive output cables.

Technical Frequently Asked Questions

• What is the pinout configuration for the M12 V1 connector interface?

  Pin 1 connects to +VDC positive power, Pin 3 connects to 0 VDC, and Pin 4 serves as the PNP normally open (NO) switched signal output.

• Can the NJ2-8GM40-E2-V1 sensor be mounted flush in steel structures?

  Yes, the sensor features a shielded electromagnetic design allowing flush mounting directly into metal mounting brackets without false triggering.

• What short-circuit protective features are built into the PNP output stage?

  The PNP switching stage incorporates pulsing short-circuit protection that safely deactivates the output current during shorted load conditions.

• What is the maximum output switching frequency of this proximity switch?

  The high-speed internal oscillator supports a maximum switching execution rate of up to 3000 Hz for high-speed target counting.

• What degree of ingress protection does the stainless steel enclosure carry?

  The fully encapsulated stainless steel housing meets IP67 ingress protection standards against dust exposure and fluid immersion.

• Does reverse polarity on the power input terminals damage the sensor?

  No, internal reverse polarity protection diodes prevent hardware damage if the positive and negative power leads are inverted accidentally.

• What target material is used to establish the 2 mm rated operating distance?

  The nominal 2 mm sensing range is established using a standard mild steel (Fe 360) target measuring 8 mm x 8 mm x 1 mm.

• How does ambient temperature affect the switching point stability?

  The internal temperature compensation network maintains operating point drift within <= +/-10% of the nominal sensing distance across -25 to 70 deg C.