Pepperl+Fuchs RL28-8-H-2000-IR-Z_110_116 Background Suppress

Technical Overview

The Pepperl+Fuchs RL28-8-H-2000-IR-Z/110/116 is an advanced background suppression sensor designed for reliable object detection across various industrial applications. Utilizing modulated infrared light at 880 nm, this sensor features a minimal black-white difference of less than 40%, ensuring consistent performance regardless of object color or surface properties. It offers a wide detection range from 20 mm to 2000 mm and incorporates programmable time functions, including ON delay (GAN), OFF delay (GAB), one shot (IAB), and combinations thereof, with an adjustable interval from 0.02 s to 1 s. The sensor is highly immune to ambient light up to 50000 Lux, even from energy-saving lamps, and boasts robust IP67 protection, making it suitable for harsh environments. Its electrical specifications include a 10-30 V DC operating voltage with a 1 push-pull (4 in 1) output, short-circuit and reverse polarity protected.

Key Features

Ultra bright LEDs for power on and switching state indication
Minimal black-white difference (< 40%) through infrared transmission LED
Programmable time function GAN, GAB, IAB and GAN-IAB as double function
Not sensitive to ambient light, even with energy saving lamps, up to 50000 Lux
Waterproof, degree of protection IP67
Protection class II for enhanced safety
Wide operating voltage range of 10 to 30 V DC
1 push-pull (4 in 1) signal output, short-circuit and reverse polarity protected
Adjustable detection range from 20 mm to 2000 mm
Fast response time of 2 ms with 250 Hz switching frequency
Durable plastic housing and optical face
cULus Listed for compliance with safety standards

Technical Specification Matrix

Parameter	Value
Detection Range	20 ... 2000 mm
Detection Range Min.	20 ... 200 mm
Detection Range Max.	20 ... 2000 mm
Background Suppression	max. + 10 % of the upper limit of the detection range
Light Source	IRED
Light Type	modulated infrared light, 880 nm
Black-White Difference (6%/90%)	< 40%
Diameter of the Light Spot	approx. 70 mm at a distance of 2000 mm
Opening Angle	transmitter 2°, receiver 2°
Ambient Light Limit	50000 Lux
MTTFd	720 a
Mission Time (TM)	20 a
Diagnostic Coverage (DC)	0%
Operation Indicator	LED green
Function Indicator	2 LEDs yellow (ON: object inside scanning range, OFF: object outside scanning range)
Control Elements	Sensing range adjuster, Light-on/dark-on changeover switch
Operating Voltage (UB)	10 ... 30 V DC
Ripple	10 %
No-load Supply Current (lo)	≤ 40 mA
Switching Type	light/dark on, switchable
Signal Output	1 push-pull (4 in 1) output, short-circuit protected, reverse polarity protected
Switching Voltage	max. 30 V DC
Switching Current	max. 100 mA
Switching Frequency (f)	250 Hz
Response Time	2 ms
Timer Function	ON delay (GAN), OFF delay (GAB), one shot (IAB), ON delay-one shot (GAN-IAB), ON delay-OFF delay (GAN-GAB), programmable adjustment interval 0.02 s ... 1 s
Product Standard	EN 60947-5-2
UL Approval	E87056, cULus Listed, class 2 power supply, type rating 1
Ambient Temperature	-40 ... 60 °C (-40 ... 140 °F)
Storage Temperature	-40 ... 60 °C (-40 ... 140 °F)
Degree of Protection	IP67
Connection	terminal compartment with 8 spring-loaded terminals for wire cross section 0.5 ... 1.5 mm², insulation stripping 7.5 ... 8.5 mm, M16 x 1.5 cable gland
Housing Material	plastic
Optical Face Material	plastic

Industrial Applications

1. Conveyor Belt Material Sorting

This sensor is ideal for reliable material differentiation on conveyor belts, where varying object colors or background reflections often challenge standard sensors. Its minimal black-white difference and background suppression ensure consistent detection.

Problem Solved

Inconsistent object detection on conveyor belts due to variations in material color or reflective backgrounds, leading to sorting errors.

material sortingconveyor systemsbackground suppressioninfrared detectionblack-white difference

2. High-Speed Packaging Line Object Counting

Perfect for accurate, high-speed counting of packages on a production line. The sensor's rapid response time, high switching frequency, and programmable time functions enable precise object detection and control, even in brightly lit environments.

Problem Solved

Inaccurate or missed counts of objects on fast-moving packaging lines due to sensor speed limitations or ambient light interference.

object countingpackaging automationhigh-speed detection250 Hz switching frequencyprogrammable timer

3. Outdoor Industrial Gate Monitoring

Suitable for detecting vehicles or personnel at outdoor industrial gates or large doors. The IP67 protection ensures durability against weather, while its insensitivity to ambient light guarantees reliable operation under direct sunlight or adverse lighting.

Problem Solved

Unreliable outdoor detection at gates due to exposure to dust, rain, and varying light conditions, which can cause false negatives or positives.

gate controloutdoor sensingIP67 protectionambient light immunityvehicle detectionpersonnel safety