Integrated Base Sounder with Isolator

Product code: 45681-277APO

45681-277APO - Integrated Base Sounder with Isolator
The Integrated Base Sounder is made up of a base sounder with integral mounting base. It is designed for indoor use.
Full Details
Electrical Description

The integrated base sounder is line powered and needs no external power supply. It operates at 17–28V DC and is polarity-sensitive.

Mechanical Construction

The integrated base sounder is moulded in polycarbonate and has stainless steel contacts that accept solid or stranded cables of up to 2.5mm².

Device Addressing

ADDRESSING The integrated base sounder responds to its own individual address set with a DIL switch. It also responds both to a group address, set by means of a 4-segment DIL switch and to a pulsed-mode synchronisation address which is embedded in the unit. GROUP ADDRESSING It may be desirable, in alarm conditions, to switch more than one integrated base sounder simultaneously. To enable this, sounders may be controlled as a group and given a group address which is common to all sounders in the group. When a device recognises its group address, it will process the forward command bits but it will not return any data to the control panel on that ad dress. If it is required to confirm the status of the outputs of devices under group address control, it is necessary to interrogate all devices in the group at their individual addresses.


XP95, Discovery and CoreProtocol compatible

Backward Compatibility

The features of the Integrated base sounder are available only when the sounder is connected to a control panel with the appropriate software.

Additional Information

For more details, refer to Installation Guides (39214-210, 39214-305) and Datasheets (PP2209, PP2227, PP2203 and PP2090).

Additional Information 1

For more details, refer to Installation Guide - 39214-210 and Datasheets (PP2209, PP2203 and PP2090).

Product Information

The Integrated Base Sounder is made up of a base sounder with integral mounting base. It is designed for indoor use.

Key Features

Two tones Two volume ranges 55-75dB(A) and 75-91dB(A) Individual and group addressing Unique acoustic self-test Built-in isolator

Warranty10 year
Selectable volume(s)
  • 55–75dB (A)
  • 75–91dB (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 current200μA
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)-20°C
Operating temperature (max)60°C
Operating temperature-20 to 60°C
IP rating ValueIP21D
StandardsEN 54-3
  • FG
  • SBSC
  • CPR
Materials housingPolycarbonate
Product length38mm
Product diameter115mm
Information icon
Please Log in or register for unlocked and editable PDFs, BIM Objects and Product Images.
Data Sheets
Installation Guides
How to Order

Apollo is dedicated to ensuring that our customer service is aligned with your expectations. This includes making our order, service and delivery process a seamless and hassle-free experience.

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.

Alert Tone
Apollo Evacuate Tone - Integrated Base Sounder