Analog Photoelectric Smoke Detector MODUL-R™ MRI-2251
   
The MRI-2251 intelligent addressable photoelectric smoke detector offers performance and serviceability features capable of benefiting the customer, installer, and manufacturer well beyond that which is possible with a conventional type detector. The MRI-2251 is continually monitored to measure any change in its sensitivity due to the environment (dirt, smoke, temperature, humidity, etc.). It can give an advanced indication to the panel of the need for maintenance and be specific as to where the maintenance is needed. If local regulations permit, in an intelligent system, maintenance on individual detectors may be performed as required rather than having to check the sensitivity of ALL detectors to assure overall performance when only a few may be dirty.

The MRI-2251 detector represents the state of the art in smoke detector technology. It features fully coated circuit boards, special bug and dirt protection, and superior RF/transient protection. The MRI-2251 will transmit an analog value representative of the sensitivity that can be used by the system to determine when maintenance is required. Signal processing for alarm verification can be built into the system to provide immunity to false alarms.

MRI-2251 detectors are simple to install, service, and maintain. These detectors incorporate built-in type identification so the system can identify the type of detector. The MRI-2251 also has a built-in magnetic reed switch for local testing.

Features

 UL, ULC, CSFM, MSFM, and MEA listed
 FM, LPCB, VdS, and EN54 (Part 7) Approved
 Sleek, low profile design
 Geometrically optimized photoelectric sensing chamber
 Unique optical sensing chamber
     - superior signal-to-noise ratio (2.0)
     - stable photoelectric operation
     - factory test at nominal sensitivity
     - built-in signal processing
 Built-in test switch
 Remote test feature (from the panel)
 Low Standby current
 Built-in tamper-resistant feature
 Designed for direct surface or electrical box mounting
 Sealed against dirt, bugs, and back pressure
 Insect resistant screening (0.635 mm / 0.025" openings)
 High velocity performance up to 20.32 m/s (4,000 fpm)
 Shielded electronics
 360° field viewing angle of the visual alarm indicators (2 LED's)
 Removable cover for field cleaning
 Easy plug-in of the head to base
 SEMS screws for wiring of the separate base
 Direct dial DECADE 00-99 address entry
 Stable communications techniques with noise immunity
 Two visible LEDs for alarm indication
 
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