The Hochiki ALN-EN(WHT)-SCI is an intelligent photoelectric (optical) smoke sensor with a built-in short circuit isolator (SCI), supplied in a white case and fully compatible with Hochiki's ESP analogue addressable protocol. It uses Hochiki's High Performance Chamber technology, which allows the alarm threshold to be raised, improving the signal-to-noise ratio and reducing susceptibility to false alarms, and removes the need for ionisation smoke sensors in most applications.
Key features
- Integral short circuit isolator (SCI)
- Removable High Performance Chamber for easy cleaning or replacement
- Improved baffle design lets smoke in while keeping ambient light out
- Twin LEDs for 360° viewing - green when polling, amber when isolating, red in fire
- Locking mechanism (sensor to base)
- Variable sensitivity
- Electronically addressed
- Pulsing/non-pulsing LED controlled from the panel (panel compatibility required)
Technical specifications
- Protocol: Hochiki ESP (digital communications)
- Operating voltage: 17-41 V DC
- Low power mode current (typ.): 120 µA
- Quiescent current (typ.): 400 µA
- Alarm current (controlled by panel): 9.1 mA, excluding remote indicator
- Current in short circuit: 13.5 mA
- Operating temperature: -10°C to +50°C
- Operating humidity: 95% RH non-condensing (at 40°C)
- Storage temperature: -30°C to +60°C
- Case: white ABS
- Dimensions: 100 mm diameter x 45 mm high
- Weight: 95 g
- Compatible base: YBV-R/4
- Base fixing centres: 48-74 mm
