Conventional Detection Vision Range
Vision 2020HF 78°C Fixed Heat Detector | EN54 Part 5
- Detector type
- 78ºC Fixed Temperature Heat Detector
- Operating voltage range
- 14 to 28VDC (Nominal 24VDC)
- Maximum standby current
- Maximum Standby Current @ 25ºC 75μA @ 24VDC
- Maximum alarm current
- Maximum Alarm Current 70mA @ 28VDC
- Max wire gauge for terminals
- 0.4mm2 to 2.0mm2
- Max ambient operating temperature note
- To avoid unwanted alarm conditions being triggered by class BS detectors the maximum ambient operating temperature should not exceed 65ºC.
- Standards
- EN54 Part 5
You will also need
Needed to install, power or certify this product.
Standard detector mounting base for Vision detectors
2020B Standard Base – adds 9.5mm to detector height
Detector mounting base fitted with schottky diode. For Vision detectors
2020BSD Standard Base with Schottky diode
DEEP BASE SCHOT DIODE VISION S
2020DBSD Deep Base with Schottky diode
Overview
What it is and how it fits the system.
The 2020HF is a 78°C fixed-temperature heat detector from the Vision range of conventional detectors, combining a heat element with an ASIC and a static element for quick, accurate fire detection. It operates from 14 to 28VDC (nominal 24VDC) with a 75µA maximum standby current at 24VDC and 70mA maximum alarm current at 28VDC, across an application range of -30°C to +70°C. The 102mm-diameter head stands 40.5mm high and accepts terminal wiring from 0.4mm² to 2.0mm² at 5 to 95% RH non-condensing.
Technical overview
The 2020HF is a Conventional 78°C Fixed Temperature Heat Detector from the Vision range, designed as a standalone fixed-temperature detector using a heat element, ASIC, and static element for rapid fire response. It operates on 14 to 28VDC (nominal 24VDC) with a maximum standby current of 75µA at 24VDC and 70mA alarm current at 28VDC, suitable for ambient temperatures from –30°C to +70°C and humidity levels of 5 to 95% non-condensing.
The detector head measures 102mm in diameter and 40.5mm in height, constructed from ABS material approximating RAL9016, and weighs 70g. It accepts terminal wiring from 0.4mm² to 2.0mm² and is compatible with various Vision detector bases, including the 2020B Standard Base (adding 9.5mm height) and 2020DB Deep Base (adding 21mm height), as well as Schottky diode variants. Certified to EN54 Part 5 and approved to EN54 – 5:2000 (Amendment 1) Class BS, it also holds LPCB and CE approvals for use in conventional fire alarm systems.
Specifications
Full technical data for this part.
| Detector type | 78ºC Fixed Temperature Heat Detector |
|---|---|
| Operating voltage range | 14 to 28VDC (Nominal 24VDC) |
| Maximum standby current | Maximum Standby Current @ 25ºC 75μA @ 24VDC |
| Maximum alarm current | Maximum Alarm Current 70mA @ 28VDC |
| Max wire gauge for terminals | 0.4mm2 to 2.0mm2 |
| Application temperature range | –30ºC to +70ºC (see note 1) |
| Max ambient operating temperature note | To avoid unwanted alarm conditions being triggered by class BS detectors the maximum ambient operating temperature should not exceed 65ºC. |
| Humidity | 5 to 95% Relative Humidity (non-condensing) |
| Height | 40.5mm (plus 9.5mm for standard base) |
| Diameter | 102mm |
| Weight | 70g (plus 45g for standard base) |
| Colour | Approximates RAL9016 |
| Material | ABS |
| Standards | EN54 Part 5 |
Specifications sourced from manufacturer documentation.
Specifications per manufacturer documentation, subject to change — E&OE. Spotted an inaccuracy? Let us know
Datasheets & documents
Reference downloads.
- Datasheet (2020HF)datasheet682 KB