
Background suppression sensor
Receiver
Transmitter
Name plate
Light/dark switch
LED-switch status
LED-switch status
LED-operating display
Dovetail mount
DIP-switch
Indicator of detection range
for Off delay and one shot
Indicator of detection
range for On delay
Relay NC
Relay NO
Relay center contact
12 ... 240 V AC/DC
12 ... 240 V AC/DC
Sensing range adjuster
DIP-switch
16
9.6
25.8
2
25
66211
5
63
88
65.5
26
ø5
26.5
8
5
4
3
2
1
8
7
6
GY
BU
BU
BN
BN
BK
WH
GY
ON
4
3
2
1
OFF
Germany: +49 621 776 1111Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Background suppression sensor
RLK28-8-H-2000-IR-Z/31/116
Universal series with highly versatile fields of use
<
Resistant against noise: reliable operation under all conditions
<
Minimal black-white difference through the infrared transmission
<
LED
Programmable time function GAN, GAB, IAB and GAN-IAB as
<
double function
Version for universal voltages
<
Dimensions
Release date: 2020-12-10 Date of issue: 2020-12-10 Filename: 134133_eng.pdf
1

Background suppression sensor RLK28-8-H-2000-IR-Z/31/116
Germany: +49 621 776 1111Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Technical Data
General specifications
Detection range 20 ... 2000 mm
Detection range min. 20 ... 200 mm
Detection range max. 20 ... 2000 mm
Adjustment range 200 ... 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
Angle of divergence transmitter 2°
Ambient light limit 50000 Lux
Functional safety related parameters
MTTF
d
Mission Time (TM) 20 a
Diagnostic Coverage (DC) 0 %
Indicators/operating means
Operation indicator LED green
Function indicator 2 LEDs yellow
Control elements Sensing range adjuster , Light-on/dark-on changeover switch
Electrical specifications
Operating voltage U
Power consumption P
Output
Switching type light/dark on, switchable (selectable, light/dark switching is only activated if the
Signal output Relay, 1 alternator
Switching voltage max. 250 V AC/DC
Switching current max. 2 A
Switching power DC: max. 50 W AC: max. 500 VA
Switching frequency f 25 Hz
Response time 20 ms
Timer function ON delay (GAN), OFF delay (GAB), one shot (IAB), ON delay-one shot (GAN-IAB),
Conformity
Product standard EN 60947-5-2
Approvals and certificates
EAC conformity TR CU 020/2011
Protection class II, rated insulation voltage ≤ 250 V AC with pollution degree 1-2 according to IEC
UL approval E87056 , cULus Listed Caution: This equipment is considered as open-type
receiver 2°
620 a
ON: object inside the scanning range
OFF: object outside the scanning range
12 ... 240 V AC/DC
B
≤ 3.5 VA
0
receiver has 'dark on' selected.)
ON delay-OFF delay (GAN-GAB), programmable
adjustment interval 0.1 ... 10 s
TR CU 004/2011
60664-1 Output circuit insulated from control circuit in accordance with IEC 61140.
Caution!
The protection class 2 is only valid when the terminal compartment is closed.
equipment. It must be mounted within an enclosure, that is suitably designed for
protection against internal fire and personal injury resulting from accessibility to live
parts according UL 508.
CCC approval Certified by China Compulsory Certification (CCC)
Ambient conditions
Ambient temperature -40 ... 60 °C (-40 ... 140 °F)
Storage temperature -40 ... 75 °C (-40 ... 167 °F)
Mechanical specifications
Housing width 25.8 mm
Release date: 2020-12-10 Date of issue: 2020-12-10 Filename: 134133_eng.pdf
2

NO
NC
C
C
~/0 V
~/+UB
8 (BK)
7 (WH)
6 (GY)
5 (GY)
4 (BU)
3 (BU)
2 (BN)
1 (BN)
Option:
12V ... 240 V
AC/DC
The relay-functions "NC"
and "NO" bear on
the switching mode
"Light-ON".
This complies to the default
setting of the light/dark
switch, located on top of the
housing (factory setting).
x
y
RL(K)28-8-H-2000-IR
Offset Y [mm]
Distance X [mm]
Characteristic response curve
white 90 %
grey 18 %
black 6 %
-15
-10
-5
0
5
10
15
0 500 1000 1500 2000 2500
Background suppression sensor RLK28-8-H-2000-IR-Z/31/116
Germany: +49 621 776 1111Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Technical Data
Housing height 88 mm
Housing depth 65.5 mm
Degree of protection IP67
Connection terminal compartment with 8 spring-loaded terminals for wire cross section 0.5 ... 1.5
Material
Housing Plastic ABS
Optical face Plastic pane
Mass 112 g
mm2, insulation stripping 7.5 ... 8.5 mm, M16 x 1.5 cable gland
Connection Assignment
Characteristic Curve
Release date: 2020-12-10 Date of issue: 2020-12-10 Filename: 134133_eng.pdf
3

x
RL(K)28-8-H-2000-IR
white 90 %
grey 18 %
black 6 %
Adjusted detection distance X [mm]
Measured detection distance X [mm]
Difference in detection distance
0
500
1000
1500
2000
2500
0
500
1000 1500 2000 2500
Background suppression sensor RLK28-8-H-2000-IR-Z/31/116
Germany: +49 621 776 1111Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Characteristic Curve
Accessories
OMH-05 Mounting aid for round steel ø 12 mm or sheet 1.5 mm ... 3 mm
OMH-21 Mounting bracket
OMH-22 Mounting bracket
OMH-RLK29 Mounting bracket
OMH-RLK29-HW Mounting bracket for rear wall mounting
OMH-RL28-C Weld slag cover model
Release date: 2020-12-10 Date of issue: 2020-12-10 Filename: 134133_eng.pdf
4

Germany: +49 621 776 1111Pepperl+Fuchs Group
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
USA: +1 330 486 0001 Singapore: +65 6779 9091
www.pepperl-fuchs.com fa-info@us.pepperl-fuchs.com fa-info@sg.pepperl-fuchs.com
fa-info@de.pepperl-fuchs.com
Background suppression sensor
ON
123
4
ON
123
4
ON
123
4
ON
123
4
Timer function
Without
OFF delay
Dark
Light
Dark
Light
Dark
Light
Switching type Receiver exposed
Receiver dark
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON delay
one shot
Dark
Light
ON
OFF
ON
OFF
t
ON
t
ON
t
ON
t
ON
t
OFF
t
OFF
t
OS
t
OS
t
OS
t
OS
t
OS
t
OS
t
OFF
t
OFF
Time tON, t
OFF
and tOS are adjustable from 0.1 to 10 seconds.
The Light-/Dark-Switch (Left, outer switch) is shown in the "Dark ON" position.
RLK28-8-H-2000-IR-Z/31/116
Timer functions
Type Description Notes
-Z OFF delay timer Adjustable time interval
one shot timer
ON delay timer
ON delay timer / OFF delay timer
ON delay timer / one shot timer
(0.1 s - 10 s)
Accessories
Other suitable accessories can be found at www.pepperl-fuchs.com
Release date: 2020-12-10 Date of issue: 2020-12-10 Filename: 134133_eng.pdf
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