HomePersonal SafetyFire Extinguishing › NSC Sicherheitstechnik B07964-00 Open Area Alarm Device

NSC Sicherheitstechnik B07964-00 Open Area Alarm Device


The NSC Sicherheitstechnik Open-area Alarm Devices are loop-powered, wall mounted devices which are connected to any XP95 or Discovery system.

The range comprises sounders, beacons and sounder beacons, all designed to fit to a common mounting base. Details are shown in Table 1 overleaf.


The alarm devices offer:

  three tones on standard devices; Apollo, Slow Whoop and DIN – all of which comply with EN54–3:2001
  two volume settings 92dB(A) and 100dB(A)
  synchronisation of tones and flashes
  individual & group addressing
  built-in isolator (EN54 versions only)
  wire-to-base for simple interchange of device
  device locking facility

A nominal sound output of 100dB(A) is achieved at a current consumption of 5mA in the case of the sounder and 8mA for the sounder beacon.

Many control panels will be able to drive up to 20 sounders and up to 15 sounder beacons per loop on average. The maximum number of devices that may be connected to a particular loop should, however, be determined by a loop loading calculation using the Apollo Loop Calculator.

The Apollo tone version produces a pulsed alert tone of 984Hz, 1 second off and 1 second on, and a continuous evacuation tone of 644Hz for 0.5 seconds followed by 984Hz for 0.5 seconds.

The volume control can be used to adjust the sound from 100dB(A) to 92dB ±3dB(A) if required.


The sounder also offers synchronisation of continuous and pulsed tones. This ensures the integrity of the alert signals – tones from different sounders do not merge into one signal that could be mistaken for an 'evacuate' tone.


The open-area alarm devices respond to their own individual address set with a DIL switch. They can also respond to a 'Group Address' which allows multiple sounders to be controlled simultaneously.

A group address may be any spare address between 112 and 126 and is selected by means of a 4 segment DIL switch. A device under group address control must have an individual address between 1 and 111 otherwise a fault value of 4 is transmitted.

Devices not using the group address facility may be addressed at any address (1–126).

NSC Sicherheitstechnik B07964-00 Open Area Alarm Device


The alarm devices will operate only with control equipment using the Apollo XP95 or Discovery protocol. The features of the Open-area alarm devices are available only when the device is connected to a control panel with the appropriate software.


The alarm devices have a base which is fitted to the mounting surface and wired as a 'first fix'. Since the alarm devices are intended for use in open areas, it is possible for more than one device to be audible at any given point in a building. For this reason, the operation of all may be synchronised by the control panel.

All the alarm devices can be assigned group addresses as well as individual addresses, so that the functional options of the sounder are identical with those of the Sounder Control Unit part no 55000-182.


All devices are powered directly from the loop and need no external power supply. They operate at 17–28V DC and are polarity sensitive.


The alarm devices are supplied with three selectable tones and flashes either—Apollo, Slow Whoop and DIN or Apollo, Australia and New Zealand.

Data Sheet

Ordering Information

Apollo Part Numbers

Sounder red 55000-001
Sounder white 55000-002
Sounder red 55000-003
Sounder white 55000-004
Sounder beacon red Apollo 55000-005
Sounder beacon white 55000-006
Sounder beacon red 55000-007
Sounder beacon white 55000-008
Beacon red 55000-009 Beacon white 55000-010
Beacon red 55000-011
Beacon white 55000-012

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

Back To Last Page

Modular System

Solution F1

Compact System

Solution F2

Detectors and Alarm Devices

B02700-00 Discovery Optical Smoke Detector

B02704-00 Discovery Optical/Heat Multi Sensor Detector

B02706-00 Discovery Heat Detector

B02725-00 Discovery Manual Call Point

B02750-00 Discovery Mounting Base

B07964-00 Open Area Alarm Device

B07974-00 Sounder Beacon Base


B02840-00 Input/Output Unit With Isolator

B02842-00 XP95 Three Channel Input/Output Unit

Part Number Index

Part Number Index

Want A Quotation?

We are open Monday to Friday, from 9.30 - 5.30 GMT.
Keison Global trading as:
Keison Products, VoIPon Solutions & 4Gon
keison VoIPon Solutions 4Gon Bitcoin Accepted Here Pay With Gold Globals