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Red rectangular sensor with M12 connector and potentiometer adjuster

Wenglor

Wenglor LN89PA3 Retro-Reflex Sensor PNP 5500 mm IP67

SKU CH-4PWJ-ZH1MA MPN LN89PA3

A retro-reflex sensor detects objects up to 5500 mm using polarised red light with a 5 ° opening angle and potentiometer adjustment

  • TypeTest Equipment
  • Color/FinishRed
  • Item Count1 pack
  • Selling UnitBox
  • Parts3 Years
  • Labor1 Year
  • 5500 mm sensing range for long-distance detection
  • PNP antivalent output simplifies wiring with NO/NC in one device
  • IP67 fully encapsulated housing withstands harsh environments
  • 100000-hour LED service life reduces maintenance intervals
  • ..30 V DC supply with reverse polarity and short-circuit protection

Retro-Reflex Sensor with 5500 mm Range

The Wenglor LN89PA3 is a polarised retro-reflex photoelectric sensor designed for presence detection in industrial environments. Its single-lens optic and 5 ° opening angle produce a focused red-light beam suited to conveyor monitoring, packaging lines and automated assembly stations. The PNP antivalent output provides both normally-open and normally-closed signals from a single device.

DC Supply Limits and Protection

Operation requires a 10...30 V DC supply drawing under 40 mA at 24 V. Built-in short-circuit, reverse-polarity and overload protection guard the output stage, while the IP67-rated fully encapsulated plastic housing withstands wash-down and dust ingress. The sensor meets Protection Class III and connects via a standard M12 × 1 four-pin plug.

Switching Performance and Headroom

A 1 kHz switching frequency and 500 µs response time handle fast object sequences, with hysteresis below 15 % for stable switching points. The 200 mA output current drives relays, PLC inputs or indicator stacks directly, while residual current stays under 50 µA. Temperature drift remains under 10 % across the -10...60 °C range, and the 100 000 h service life at 25 °C supports long maintenance intervals.

Highlights

  • 5500 mm sensing range for long-distance detection
  • PNP antivalent output simplifies wiring with NO/NC in one device
  • IP67 fully encapsulated housing withstands harsh environments
  • 100000-hour LED service life reduces maintenance intervals
  • ..30 V DC supply with reverse polarity and short-circuit protection

Specifications

BrandWenglor
ModelLN89PA3
TypeTest Equipment
Color/FinishRed
Item Count1 pack
Selling UnitBox
Parts3 Years
Labor1 Year

Questions about this item

Should I choose the potentiometer-adjustable version or a fixed-range model?

The LN89PA3 uses a potentiometer for sensitivity setting, allowing you to tune the 5500 mm range on site; no fixed-range alternative is listed.

How does the 5500 mm range perform with the RQ100BA reflector?

With the RQ100BA reflector the sensor reaches its full 5500 mm sensing distance, using a 5° opening angle and polarisation filter to reject false returns.

What does the M12 4-pin connection limit in practice?

The M12 × 1, 4-pin connector carries the 10…30 V DC supply and the PNP NO/NC antivalent output, cabling both switching states in a single cable run.

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