Pepperl+Fuchs LA28/LK28-FC-Z/31/116 Fire protection thru-beam sensor

Pepperl+Fuchs LA28/LK28-FC-Z/31/116
Item Number: LA28/LK28-FC-Z/31/116
  • Compact fire protection photoelectric sensor for safety devices on fire barriers
  • Approval in accordance with VdS Test Report FSA and externally monitored manufacture (Гњ Symbol)
  • Not sensitive to ambient light, even with switched energy saving lamps
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Timer functionON delay (GAN), OFF delay (GAB), one shot (IAB), ON delay-OFF delay (GAN-GAB), programmable
adjustment range 0.1 ...10 s
Light typemodulated visible red light and modulated infrared light
Relative humidity30% ... 85% non-condensing ; Non-icing
EAC conformityTR CU 020/2011
TR CU 004/2011
Response time20 ms
Switching typelight/dark on, switchable . (selectable, light/dark switching is only activated if the receiver has 'dark on' selected.)
Diameter of the light spotapprox. 0.2 m at 10 m
Ambient temperature-40 ... 60 В°C (-40 ... 140 В°F)
Ambient light limit50000 Lux
Angle of divergenceEmitter 1.2В°,
Receiver 5В°
Switching powerDC: max. 50 W AC: max. 500 VA
Light sourceLED, 660 nm and IRED, 880 nm
CCC approvalCertified by China Compulsory Certification (CCC)
ApprovalsVdS/DIBt certificate of compliance No. 25021
Connectionterminal 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
Alignment aidLED red (in receiver lens)
illuminated constantly: beam is interrupted,
flashes: reaching switching point,
off: sufficient stability control
Operation indicatorLED green
Threshold detection range10 m
Effective detection range0 ... 10 m
StandardsEN 60947-5-2
smoke insensitive up to 2 dB/m ( EN 54-12 )
Signal outputRelay, 1 alternator
Switching voltagemax. 250 V AC/DC
Switching currentmax. 2 A
Protection classII, 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.
The protection class 2 is only valid when the terminal compartment is closed.
Operating voltage12 ... 240 V AC/DC
Storage temperature-40 ... 75 В°C (-40 ... 167 В°F)
Power consumption 3.5 VA
Mass200 g (emitter and receiver)
Degree of protectionIP67
Control elementsLight-on/dark-on changeover switch ; Time adjuster
Switching frequency25 Hz
Function indicatorLED yellow:
1. LED lit constantly: signal > 2 x switching point (function reserve)
2. LED flashes: signal between 1 x switching point and 2 x switching point
3. LED off: signal < switching point


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