CONTEXT PLUS ADDRESSABLE UL LISTED OPTICAL SMOKE DETECTOR

Description

The 58000-650IMC is an addressable optical (photoelectric) smoke detector, part of the Context UL-Plus range, using the Discovery / Xpert protocol for communication. It’s UL-Listed and designed for intelligent fire alarm systems. It uses a white polycarbonate housing with wind-resistant smoke inlets and a flashing LED indicator. 

Smoke is detected via a pulsing infra-red LED inside a baffled chamber; smoke particles scatter the light onto a photodiode, which then triggers an alarm when threshold is exceeded. The detector also integrates signal processing, addressing electronics, and communications circuitry.

Key Features

• Supports 17–28 V DC supply, two-wire addressable loop, polarity insensitive 

• Quiescent current ~ 340 µA average (with peaks to ~ 600 µA)

• Optical sensitivity: typically triggers at ~ 2.4% smoke obscuration per meter 

• Flashing LED option & 360° visibility alarm indicator for clear visual alerts 

• Five selectable response modes to adapt to environment (e.g. clean, dusty, humid) 

• Drift compensation built in — automatically adjusts sensitivity over time to mitigate dust accumulation 

• Operating temperature: –20 °C to +60 °C 

• Humidity tolerance: 0% to 95% RH without condensation / icing

• IP Rating: IP43 (secures some protection from intruding objects / moisture) 

• Compact size & weight: ~ 100 mm diameter × 42 mm height; ~ 105 g device weight

Industrial Uses / Applications

• Commercial / office buildings — corridors, lobbies, escape routes

• Residential complexes & apartment blocks

• Hotels, schools, hospitals

• Warehouses, retail stores

• Any fire detection system using addressable loops and requiring early smoke detection