WLD4FP-21A121A0ZZZ

Features

Functional principle

Photoelectric retro-reflective sensor

Functional principle detail

With minimum distance to reflector (dual lens system)

Sensing range
Sensing range min.	0 m
Sensing range max.	4.5 m
Maximum distance range from reflector to sensor (operating reserve 1)	0.015 m … 4.5 m
Recommended distance range from reflector to sensor (operating reserve 3,75)	0.035 m … 3.9 m
Reference reflector	Reflector P250
Recommended sensing range for the best performance	0.035 m … 3.9 m

Polarisation filters

Yes

Emitted beam
Light source	PinPoint LED
Type of light	Visible red light
Shape of light spot	Point-shaped
Light spot size (distance)	Ø 38 mm (1,000 mm)
Maximum dispersion of the emitted beam around the standardized transmission axis (squint angle)	< +/- 1.5° (at Ta = +23 °C)

Adjustment
None	–

Indication
LED green	Operating indicator Static on: power on
LED yellow	Status of received light beam Static on: object not present Static off: object present Flashing: Below the 1.5 function reserve

Electrical data

Supply voltage U_B

10 V DC … 30 V DC ¹⁾

Ripple

≤ 5 V_pp

Usage category

DC-12 (According to EN 60947-5-2)

DC-13 (According to EN 60947-5-2)

Current consumption

≤ 20 mA, without load. At U_B = 24 V

Protection class

III

Digital output
Number	1
Type	PNP
Signal voltage PNP HIGH/LOW	Approx. U_B-2.5 V / 0 V
Output current I_max.	≤ 100 mA
Circuit protection outputs	Reverse polarity protected
	Overcurrent protected
	Short-circuit protected
Response time	≤ 500 µs
Repeatability (response time)	150 µs ²⁾
Switching frequency	1,000 Hz ³⁾

Pin/Wire assignment
Function of pin 4/black (BK)	Digital output, light switching, object present → output Q LOW

Mechanical data

Housing

Rectangular

Design detail

Flat

Dimensions (W x H x D)

16 mm x 40.1 mm x 12.1 mm

Connection

Connector M8, 3-pin

Weight

Approx. 30 g

Maximum tightening torque of the fixing screws

0.4 Nm

Ambient data

Enclosure rating	IP66 (EN 60529) IP67 (EN 60529) IP69 (EN 60529)
Ambient operating temperature	–40 °C … +60 °C
Ambient temperature, storage	–40 °C … +75 °C
Typ. Ambient light immunity	Artificial light: ≤ 50,000 lx Sunlight: ≤ 50,000 lx
Shock resistance	30 g, 11 ms (3 positive and 3 negative shocks along X, Y, Z axes, 18 total shocks (EN60068-2-27))
Vibration resistance	10 Hz … 1,000 Hz (Amplitude 1 mm, 3 x 30 min (EN60068-2-6))
Air humidity	35 % … 95 %, Relative humidity (no condensation)
Electromagnetic compatibility (EMC)	EN 60947-5-2
Resistance to cleaning agent	ECOLAB
UL File No.	NRKH.E181493 & NRKH7.E181493

Classifications