Intelligent Open-Area Sounder (Red)

Product code: 55000-001APO

55000-001APO - Intelligent Open-Area Sounder (Red)
The Intelligent Open-Area Sounder has been designed for use in open areas and can be connected to any Discovery or XP95 system.
Full Details
Electrical Description

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


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. This is available via the Apollo website 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 55000-582 or 55000-182 (DIN-rail version).

Mechanical Construction

The alarm devices have a base which is fitted to the mounting surface and wired as a 'first fix'.

Device Addressing

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).


XP95, Discovery and CoreProtocol compatible

Backward Compatibility

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

Product Information

The Intelligent Open-Area Sounder has been designed for use in open areas and can be connected to any Discovery or XP95 system.

Key Features

Self-test fault monitoring Choice of tones on standard device: Apollo, Slow Whoop and DIN Two volume settings 92dB(A) and 100dB(A) Synchronisation of tones Individual and group addressing Built in isolator Red or white options Loop-powered IP65 rated

Warranty10 year
Maximum sound output tone100dB (A)
Selectable volume(s)
  • 92dB (A)
  • 100dB (A)
Protocol voltage (min)5V
Protocol voltage (max)9V
Protocol voltage5 to 9V peak to peak
Power-up surge current 1.2mA
Maximum power-up time<1 second
Quiescent current333μA
Quiescent current tested at24V dc
PolarityL1 & L2 are polarity sensitive
Humidity (min)0% RH
Humidity (max)95% RH
Humidity Noteno condensation or icing
Humidity0% to 95% (no condensation or icing)
Operating temperature (min)-10°C
Operating temperature (max)55°C
Operating temperature-10 to 55°C
IP rating ValueIP65
Storage temperature (min)-10°C
Storage temperature (max)55°C
Storage temperature-10 to 55°C
StandardsEN 54-3
  • LPCB
  • VdS
  • Kazak
  • CPR
Materials housingPolycarbonate
Product depth97.5mm
Product diameter104mm
How to Order

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Full details of our service standards can be downloaded here.

Existing customers

Please email your order to us at: or tel: 023 9245 6530.

New customers

Please email your order to us at: or tel: 023 9244 2700.


Despite our best efforts, mistakes sometimes happen. Please contact us at: if you have any difficulties placing your order.

Please note…

Remember to quote your account number and purchase order number on any order correspondence.

All orders must be over £50.00 (excluding carriage). Any orders received under the minimum order value will be returned to sender for revision.

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DIN Tone
Slow Whoop Tone