Hochiki ESP Addressable Optical Smoke Detector with SCI (White Case) (ALN-EN(WHT)-SCI)

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