Notifier Opal Addressable Wall Sounder with Isolator, Red NFXI-WS-R

Overview

This is the plain red wall sounder in Notifier's Opal AV range, with no light on it. Opal AV covers loop powered audible and visible alarm devices designed to warn building occupants.

It suits installers working on Notifier panels, and it gives building owners a device that swaps in without new wiring.

How it works

• Addressable: Each device has its own number on the loop, so the panel can control it individually.
• Digital signalling: the Opal protocol minimizes the current required, which allows longer loops and distinct signals for different alarm types.
• Loop isolation: Isolation protects against cable faults, so one damaged section is less likely to take out the rest.

Where to use it

Walls in Notifier-protected buildings are the obvious place, especially where existing bases are being reused. Detectors, sounders and beacons in this range are interchangeable without wiring disturbance.

Treat outdoor or damp positions as unproven until the instructions supplied confirm them.

Installing it

• Base first: Fit the B501AP, which ends up concealed once the unit is on.
• Address: Addressing uses the rotary wheels, and the sounder then twists onto the base.
• Full instructions: Refer to the installation instructions as supplied to ensure full functionality.

Planning your system

The job also needs a B501AP base and a panel using the matching protocol. The fire alarm system guide explains how a protocol decides which devices can join a loop.

If a room also needs a visual alarm, look at the fire alarm sounders and beacons range. Check each device's own approval, because a flashing indicator is not always approved as a visual alarm device.

Standards explained

• EN54-3: the standard for fire alarm sounders. This device is approved to it.
• ISO9001: a quality management standard. The range is produced in the UK in ISO9001 accredited premises.