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

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.

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Features

• Compact fire protection photoelectric sensor for safety devices on fire barriers
• Approval in accordance with VdS Test Report FSA and externally monitored manufacture (‹ Symbol)
• Not sensitive to ambient light, even with switched energy-saving lamps

Technical Data

General specifications
Effective detection range		0 ... 10 m
Threshold detection range		10 m
Light source		LED, 660 nm and IRED, 880 nm
Light type		modulated visible red light and modulated infrared light
Alignment aid		LED red (in receiver lens) illuminated constantly: the beam is interrupted, flashes: reaching switching point, off: sufficient stability control
The diameter of the light spot		approx. 0.2 m at 10 m
Angle of divergence		Emitter 1.2°, Receiver 5°
Ambient light limit		50000 Lux
Functional safety-related parameters
MTTFd		490 a
Mission Time (TM)		20 a
Diagnostic Coverage (DC)		0 %
Indicators/operating means
Operation indicator		LED green
Function indicator		LED 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 elements		Light-on/dark-on changeover switch; Time adjuster
Electrical specifications
Operating voltage		12 ... 240 V AC/DC
Power consumption		≤ 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		25 Hz
Response time		20 ms
Timer function		ON delay (GAN), OFF delay (GAB), one-shot (IAB), ON delay-OFF delay (GAN-GAB), programmable adjustment range 0.1 ...10 s
Standard conformity
Standards		EN 60947-5-2 smoke insensitive up to 2 dB/m ( EN 54-12 )
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 the control circuit in accordance with IEC 61140. Caution! Protection class 2 is only valid when the terminal compartment is closed.
CCC approval		Certified by China Compulsory Certification (CCC)
Approvals		VdS/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 humidity		30% ... 85%   non-condensing ; Non-icing
Mechanical specifications
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
Material
	Housing	Plastic ABS
	Optical face	Plastic pane
Mass		200 g (emitter and receiver)

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

Reference: pepperl-fuchs.com