Hochiki ESP Addressable Optical Smoke Detector (Black Case) (ALN-EN(BLK))

The Hochiki ALN-EN(BLK) is an intelligent photoelectric smoke sensor in a black case for the Hochiki ESP analogue addressable fire detection system. It uses Hochiki’s High Performance chamber, which lets the alarm threshold be raised to improve the signal-to-noise ratio and reduce false alarms. The chamber can be removed for cleaning, and its baffle design lets smoke in while keeping ambient light out.

See all Hochiki smoke detectors: ESP addressable, CDX conventional, multi-sensor and specialist models, with a guide to bases and panel compatibility.

Key features

• Removable High Performance smoke chamber
• Twin LEDs give 360° viewing
• Locking mechanism (sensor to base)
• Variable sensitivity, 2 %/m to 4.5 %/m
• Polling LEDs can be set to pulsing or non-pulsing from the panel (control panel compatibility required)
• Electronically addressed with the Hochiki TCH-B200 hand-held programmer
• Approved by LPCB and VdS
• SIL Level 2 approved variant available

Technical specifications

• Ordering code: ALN-EN(BLK) (black)
• Operating voltage: 17 to 41 VDC
• Low power mode: 120 µA (typical)
• Quiescent current: 400 µA (typical)
• Maximum current consumption: 30 mA
• Alarm current (controlled by the panel): 9.1 mA, excluding remote indicator
• Transmission method: digital communications using ESP
• Sensitivity levels: 2 %/m to 4.5 %/m
• Operating temperature: -10 °C to +50 °C
• Operating humidity: 95% RH non-condensing (at 40 °C)
• Storage temperature: -30 °C to +60 °C
• Case material: ABS
• Weight: 95 g
• Dimensions: Ø100 x 45 mm (H)
• Compatible bases: YBN-R/3, YBO-BS, YBO-BSB2, YBN-R/3(SCI)
• Base fixing centres: 48 to 74 mm
• Wind exposure (ref. EN54-7): 1 ± 0.2 m/s
• Ingress protection: IP42