Nortech NGA-705 Addressable Zone Monitoring Unit

Nortech NGA-705 Addressable Zone Monitoring Unit

SKU: NORTECH-00020
In Stock
Delivery within two days all over UAE.

AED 150.00

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An intelligent interface module designed to connect a zone of conventional detectors to a Nortech NGA series addressable loop, enabling legacy or specialized conventional devices to be monitored as a single address.

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Description

The Nortech NGA-705 Addressable Zone Monitoring Unit serves as an intelligent bridge that integrates a zone of conventional detectors into a Nortech NGA-600/800 addressable loop, making it ideal for retrofitting buildings or supporting specialized devices like flame detectors. The module provides comprehensive monitoring for alarm, open circuit, and short circuit conditions, utilizing an End-of-Line (EOL) resistor for circuit integrity and an integrated isolator to protect the main loop from branch faults.

Features

  • Conventional-to-Addressable Integration: Enables the use of cost-effective conventional detectors within a sophisticated addressable system architecture.
  • Full Zone Supervision: Monitors the entire conventional sub-circuit for faults; if a wire is cut or a detector is removed, the NGA-705 reports a specific fault to the main panel.
  • Integrated Short-Circuit Isolator: Protects the primary addressable loop from faults occurring on the loop wiring at the module location.
  • External Power Support: By utilizing an external 24V source for the conventional zone, it ensures the addressable loop is not overloaded by the current draw of multiple conventional heads.
  • Local Status LEDs: Features clear LED indicators to distinguish between a “Fire” condition on the conventional zone and a “Fault” on the wiring.
  • Retrofit Friendly: Ideal for upgrading old buildings where existing conventional wiring and detectors need to be integrated into a new intelligent control system.
  • Software Addressing: The module address is set digitally, ensuring high reliability and preventing accidental changes common with mechanical switches.
  • Robust Enclosure: Supplied in a durable housing designed to protect the internal circuitry and provide secure terminal connections for both loop and zone wiring.

Specifications

  • Brand: Nortech
  • Model: NGA-705
  • Protocol: Nortech Addressable
  • Conventional Zone Voltage: 18V to 24V DC
  • Quiescent Current (Loop): 450 microamps
  • External Power Supply: 24V DC (Required for conventional zone)
  • Zone Capacity: Up to 20–30 conventional detectors (model dependent)
  • End-of-Line Resistor: 5.6k Ohm (Typical for conventional branch)
  • Short-Circuit Isolator: Integrated
  • Addressing: Digital (via handheld programmer)
  • Dimensions: 120mm (H) x 80mm (W) x 40mm (D)

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