120988

What type of device is this?

It is an inductive proximity sensor designed to detect metallic objects without physical contact. The device model is NBN40-L2-E0-V1 and corresponds to Pepperl+Fuchs reference 120988.

What is the sensor's rated operating distance?

The rated operating distance is 40 mm. Its assured operating range is 0 to 32.4 mm, while the specified actual operating distance is between 36 and 44 mm.

What output configuration does the sensor use?

The sensor uses a three-wire DC, NPN, normally open output. The output switches when a suitable metal target enters the sensing range.

What operating voltage is required?

It operates from a 10 to 30 V DC supply and includes reverse-polarity protection.

What is the maximum output current?

The permitted operating current is up to 200 mA. The voltage drop across the output is no more than 2 V.

How quickly can the sensor detect moving targets?

It has a switching frequency of up to 180 Hz, making it suitable for detecting repeated metal target movements in automated machinery.

Does the sensor detect all metals at the same distance?

No. The sensing distance varies according to the target material. The stated reduction factors are 0.75 for 304 stainless steel, 0.38 for brass, 0.30 for aluminium and 0.28 for copper.

How should the sensor be installed?

This is a non-flush inductive sensor, so the sensing face should project beyond surrounding metal. Adequate clearance helps prevent nearby metalwork from affecting detection performance.

Can the sensing head be repositioned?

Yes. The sensor head is bidirectional and rotatable, allowing its orientation to be adapted to the machine layout. A quick-mounting bracket is incorporated into the design.

What electrical connector does it use?

The sensor uses a four-pin M12 x 1 connector plug. Pin 1 is the positive supply, pin 3 is the negative supply and pin 4 carries the switching output.

What do the indicator lights show?

Green LEDs indicate the operating voltage, while yellow LEDs indicate the switching state. Four indicators provide visibility around the sensor from multiple viewing angles.

What environmental protection does the housing provide?

The housing is rated IP68 and IP69K, providing a high degree of protection against dust, water immersion and high-pressure water exposure when correctly installed with a suitable connection.

What temperature range can the sensor operate within?

Its specified ambient operating temperature is -25 to 85 °C. The permitted storage temperature range is -40 to 85 °C.

What are the sensor's dimensions and weight?

The housing measures approximately 40 mm high, 40 mm wide and 67 mm long. Its stated mass is 155 g.

What housing materials are used?

Both the main housing and sensing face are made from polyamide, commonly abbreviated as PA.

Does the output include electrical protection?

Yes. The unit has pulsing short-circuit protection as well as reverse-polarity protection. Its off-state current is no more than 0.5 mA.

How long does the sensor take to become operational after power is applied?

The specified delay before availability is 80 ms, after which the sensor is ready to detect a suitable target.

Which standard does the sensor conform to?

The sensor is specified as conforming to EN IEC 60947-5-2, the standard covering proximity switches used in industrial control applications.