Pepperl+Fuchs LA28/LK28-FC-Z/31/116 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 selfclosing 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.
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
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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: beam is interrupted, flashes: reaching switching point, off: sufficient stability control | |
| 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 control circuit in accordance with IEC 61140. Caution! The 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