Serviceline Industrial Sensors
Serviceline Explosion Protection

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

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 (Ü Symbol)
  • Not sensitive to ambient light, even with switched energy saving lamps

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:


Datasheet excerpt: Technical data of  LA28/LK28-FC-Z/31/116

Product Description
Compact fire protection photoelectric sensor
General specifications
Effective detection range0 ... 10 m
Threshold detection range10 m
Light sourceLED, 660 nm and IRED, 880 nm
Light typemodulated visible red light and modulated infrared light
Alignment aidLED red (in receiver lens)
illuminated constantly: beam is interrupted,
flashes: reaching switching point,
off: sufficient stability control
Diameter of the light spotapprox. 0.2 m at 10 m
Angle of divergenceEmitter 1.2°,
Receiver 5°
Ambient light limit50000 Lux
Functional safety related parameters
MTTFd490 a
Mission Time (TM)20 a
Diagnostic Coverage (DC)0 %
Indicators/operating means
Operation indicatorLED green
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
Control elementsLight-on/dark-on changeover switch ; Time adjuster
Electrical specifications
Operating voltage12 ... 240 V AC/DC
Power consumption≤ 3.5 VA
Output
Switching typelight/dark on, switchable . (selectable, light/dark switching is only activated if the receiver has 'dark on' selected.)
Signal outputRelay, 1 alternator
Switching voltagemax. 250 V AC/DC
Switching currentmax. 2 A
Switching powerDC: max. 50 W AC: max. 500 VA
Switching frequency25 Hz
Response time20 ms
Timer functionON delay (GAN), OFF delay (GAB), one shot (IAB), ON delay-OFF delay (GAN-GAB), programmable
adjustment range 0.1 ...10 s
Standard conformity
StandardsEN 60947-5-2
smoke insensitive up to 2 dB/m ( EN 54-12 )
Approvals and certificates
EAC conformityTR CU 020/2011
TR CU 004/2011
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.
Caution!
The protection class 2 is only valid when the terminal compartment is closed.
CCC approvalCertified by China Compulsory Certification (CCC)
ApprovalsVdS/DIBt certificate of compliance No. 25021
Ambient conditions
Ambient temperature-40 ... 60 °C (-40 ... 140 °F)
Storage temperature-40 ... 75 °C (-40 ... 167 °F)
Relative humidity30% ... 85%   non-condensing ; Non-icing
Mechanical specifications
Degree of protectionIP67
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
Material
HousingPlastic ABS
Optical facePlastic pane
Mass200 g (emitter and receiver)

Approvals+Certificates: LA28/LK28-FC-Z/31/116

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0068APDF106 KB
Certificates
/cert/cert1404a.pdfReg.-Nr. 25021PDF254 KB
Canada USA UL Ordinary Location20170307-E87056PDF403 KB
China CQC CCC2020970305000329PDF536 KB

Associated Products: LA28/LK28-FC-Z/31/116

Accessories
Mounting aid for round steel ø 12 mm or sheet 1.5 mm ... 3 mmfa
Mounting bracket fa
Mounting bracket fa

Function: LA28/LK28-FC-Z/31/116

It is essential that fire is not allowed to spread in buildings should it break out. Fire protection regulations therefore prescribe fire barriers. These include fire doors, industrial fire doors and fire dampers, which are generally kept closed at all times. In areas where doors are left open, such as heavily traveled passageways and corridors, a self-closing mechanism must be automatically triggered in case of fire. However, the door must not close when persons or objects are in the closing area. Legislation consequently requires monitoring with appropriate safety devices. The technical challenge is to ignore the smoke and at the same time reliably detect objects in it. These certified photoelectric sensors fulfill this function.