Data Sheet
Germany: +49 621 776 4411Pepperl+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
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Background suppression sensor
RLK28-8-H-2000-IR-Z/31/116
2
Release date: 2018-03-26 09:36 Date of issue: 2018-03-26 134133_eng.xml
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°
receiver 2°
Ambient light limit  50000 Lux
Functional safety related parameters
MTTF
d
  620 a
Mission Time (T
M
) 20 a
Diagnostic Coverage (DC)  0 %
Indicators/operating means
Operation indicator  LED green
Function indicator  2 LEDs yellow
ON: object inside the scanning range
OFF: object outside the scanning range
Control elements  Sensing range adjuster , Light-on/dark-on changeover switch
Electrical specifications
Operating voltage  U
B
12 ... 240 V AC/DC
Power consumption  P
0
≤ 3.5 VA
Output
Switching type  light/dark on, switchable (selectable, light/dark switching is only 
activated if the receiver has 'dark on' selected.)
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), ON delay-OFF delay (GAN-GAB), 
programmable
adjustment interval 0.1 ... 10 s
Conformity
Product standard  EN 60947-5-2
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
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 mm
2
, insulation stripping 7.5 ... 8.5 mm, 
M16 x 1.5 cable gland
Material   
Housing Plastic ABS
Optical face  Plastic pane
Mass 112 g
Approvals and certificates
EAC conformity  TR CU 020/2011 
TR CU 004/2011
Protection class  II, rated insulation voltage ≤ 250 V AC with pollution degree 1-
2 according to IEC 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.
UL approval  E87056 , cULus Listed Caution: This equipment is 
considered as open-type 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)
Other suitable accessories can be found at
www.pepperl-fuchs.com
Accessories
OMH-05
Mounting aid for round steel ø 12 mm or 
sheet 1.5 mm ... 3 mm
OMH-07
Mounting aid for round steel ø 12 mm or 
sheet 1.5 mm ... 3 mm
OMH-21
Mounting bracket 
OMH-22
Mounting bracket 
OMH-MLV11-K
dove tail mounting clamp
OMH-RLK29
Mounting bracket 
OMH-RLK29-HW
Mounting bracket for rear wall mounting
OMH-RL28-C
Weld slag cover model



