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A beam smoke detector works by sending an invisible infrared (IR) beam of light across the protected area to a receiver. The receiver will then measure the strength of the beam. If smoke is present in the air, this will obscure the beam of light therefore decreasing the strength of the beam received. When enough smoke is in the air the IR light level will drop below a set threshold, which then triggers an alarm condition.
EF-CBD50 uses the reflective method. This means that the IR transmitter and receiver are housed in the same unit. A reflector is placed at the opposite end of the protected area to the detector. The reflector bounces the light beam back to the detector for processing. This is a widely used method that offers reduced installation cost and time, compared to having the transmitter and receiver as separate units.
The beam detector incorporates a bank of buttons conveniently placed on the front of the unit. This area also includes LEDs that clearly indicate the operational status of the device. This means that product setup and further adjustments can be carried out intuitively, without the need to remove the product from the installation point.
Once the hardware has been installed, the detector buttons can be used to steer a targeting laser onto the reflector. Auto-alignment can then be initiated with the press of a button. In addition, the required detection sensitivity can be set using the settings switches.
Not only does the EN and UL certified reflective beam detector have dynamic beam phasing that prevents interference between detectors that face each other, or others that are in irregular configurations, it can also adapt to environmental changes.
Building movement
When installed correctly, the detector can adjust its own alignment to compensate for natural building movement over time.
Changes in lighting
Light cancellation technology compensates for high levels of sunlight and artificial lighting that would otherwise cause nuisance alarms.
Dirt and dust build-up
In dusty or dirty environments the detector can compensate for gradual build-up of contamination that would interfere with the IR beam.
Project perfect, view our range of conventional fire alarm devices
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| Detection performance | |
| Detection range | 0 to 50m 0 to 120m with Reflective Long Range K |
| Alignment method | Laser assisted, Auto-Alignment™. Manual alignment – optional setting |
| Auto-Alignment™ protocol | Background check, Box search, Adjust and Centre |
| Building Movement Tracking™ | Compensates for natural shifts in alignment from building movement* |
| Contamination Compensation | Compensates for gradual build-up of contamination on the optical surfaces |
| Light Cancellation Technology™ | Compensates for high levels of sunlight and artificial lighting |
| Optical wavelength – smoke detection | 850nm near infrared (invisible) |
| Integrated laser – laser alignment | 650nm visible. Class IIIa <5mW |
| Dynamic Beam Phasing | Allows beam detectors to be mounted facing each other with the reflectors in the middle. Eliminates false alarms caused by crosstalk between beams |
| Signal output | Individual Alarm and Fault relays (VFCO) 2A @ 30 VDC |
| Programmable user settings | |
| Alarm response threshold levels | 25% (1.25dB) – Fastest response to smoke 35% (1.87dB) – Default value 55% (3.46dB) – High immunity to false alarms, slow response to smoke 85% (8.23dB) – Highest immunity to false alarms, slowest response to smoke Configured via the integrated user interface |
| Delay to Alarm | 10 seconds, for momentary partial obstruction of the beam path |
| Delay to Fault | 10 seconds, for momentary obstruction of the beam path |
| User features | |
| Integrated user interface | Alignment mode switch, alignment directional buttons and configuration switches for alarm response threshold |
| Alignment status indication | 2 Green LEDs and 1 Yellow LED |
| System status indication | Normal operation – Green LED flashing every 10 seconds Alarm condition – Red LED flashing every 10 seconds Fault condition – Yellow LED flashing every 10 seconds for obscuration or every 5 seconds for contamination Flat front face with enclosed optics. Cleaning the optics does not affect alignment |
| Design parameters | |
| Separation distance between Detector and Reflector | 5 to 50m 50 to 120m with Reflective Long Range Kit |
| Beam path clearance | 1m in diameter from centre line between Detector and Reflector |
| Detector dimensions | Width 130mm x Height 181mm x Depth 134mm (see diagram) |
| Reflector dimensions | Up to 50m separation distance – Single reflector 100mm x 100mm x 9mm Up to 120m separation distance – Four reflectors arranged in a square pattern 200mm x 200mm x 9mm |
| Product weight | Detector – 0.7kg; Reflector – 0.1kg |
| Multi-detector arrangement | Dynamic Beam Phasing allows for Detectors to face each other with the reflectors in the middle |
| Housing colour | White RAL9016, UV stable |
| Electrical specifications | |
| Operating voltage | 14 to 36 VDC |
| Operating current (constant) all operational modes | All operational modes – 5mA; Fast alignment mode – 33mA |
| Field wiring | |
| Cable gauge and type | 2 core, dedicated, 0.5 to 1.6mm (24 to 14 AWG) System compatible with fireproof and non-fireproof cable meeting local installation standards |
| Cable entry | 3 knock-out locations capable of accepting M20, ½” or ¾” glands 4 drill-out locations capable of accepting glands up to 21mm diameter |
| Test and maintenance | |
| Alarm test | Optical alarm test using Commissioning and Maintenance Kit accessory |
| Environmental specifications | |
| Operating temperature | -20 to +55°C |
| Storage temperature | -40 to +85°C |
| Relative humidity (non-condensing or icing) | 0 to 93% |
| IP rating | IP55 |
| Housing flammability rating | UL94 V0 polycarbonate |
| NB: All figures are quoted for 25°C | |
| Optical specifications | |
| Fault level / Rapid obscuration (Δ ≤ 2 seconds) | ≥85% |
| Maximum angular alignment of Reflective Detector | ±4.5° (±70° with adjustment bracket accessory) |
| Maximum angular misalignment of Reflective Detector | ±0.5° |
| Maximum angular misalignment of Reflector | ±5° |
| *When mounted according to manufacturers guidelines | |
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