ISO 7240-2:2017

INTERNATIONAL ISO
STANDARD 7240-2
Second edition
2017-11
Fire detection and alarm systems —
Part 2:
Fire detection control and indicating
equipment
Systèmes de détection et d'alarme d'incendie —
Partie 2: Équipement de contrôle et de signalisation
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
4 Requirements . 2
4.1 General . 2
4.2 Compliance . 3
4.3 Quiescent condition . 3
4.4 Fire alarm condition . 3
4.4.1 Reception and processing of fire signals . 3
4.4.2 Indication of fire alarm condition . 4
4.4.3 Indication of fire detection zones in alarm . 4
4.4.4 Audible indication . . 4
4.4.5 Other indications during the fire alarm condition . 5
4.4.6 Reset from fire alarm condition . 5
4.4.7 Output of fire alarm condition . 5
4.4.8 Output to fire alarm signalling function — Optional function . 5
4.4.9 Control of fire alarm routing function — Optional function . 6
4.4.10 Output to fire protection control function — Optional function . 6
4.4.11 Delays to outputs — Optional function . 7
4.4.12 Dependency on more than one alarm signal — Optional function . 8
4.4.13 Alarm counter — Optional function . 9
4.4.14 Output of standard emergency evacuation signal — Optional function . 9
4.5 Fault warning condition . 9
4.5.1 Reception and processing of fault signals . 9
4.5.2 Indication of faults. 9
4.5.3 Fault monitoring of fire protection control function — Optional function .11
4.5.4 Fault signals from points — Optional function.11
4.5.5 Total loss of the power supply — Optional function .11
4.5.6 System fault .11
4.5.7 Audible indication . .11
4.5.8 Reset of fault indications.12
4.5.9 Fault output .12
4.5.10 Output to fault warning routing function — Optional function .12
4.6 Disabled condition — Optional function .12
4.6.1 General.12
4.6.2 Disablements . . .13
4.6.3 Disablement and enablement of addressable points — Optional function .13
4.6.4 Indication of the disabled condition .13
4.7 Test condition — Optional function .14
4.7.1 General requirements .14
4.7.2 Indication of test condition .14
4.7.3 Indication of fire detection zones in test state .14
4.8 Supervisory signal condition — Optional function .14
4.8.1 Reception and processing of supervisory signals .14
4.8.2 Indication of the supervisory signal condition .15
4.8.3 Indication of the supervisory signals from fire detection zones .15
4.8.4 Audible indication . .15
4.8.5 Reset of supervisory signal .16
4.8.6 Supervisory signal condition output .16
4.9 Standardized input/output interface — Optional function .16
4.10 Accessibility of indications and controls .17
4.11 Visual indications.17
4.11.1 General.17
4.11.2 Indications by means of light-emitting indicators .17
4.11.3 Indications on alphanumeric displays .18
4.12 Audible indications.19
4.13 Additional indications.19
4.14 Testing of indicators .19
4.15 Power supply .19
4.16 Mechanical .19
4.17 Integrity of transmission paths .20
4.18 Software .20
4.18.1 General.20
4.18.2 Program monitoring .20
4.18.3 Storage of programs and data .21
4.18.4 Monitoring of memory contents .21
5 Tests .21
5.1 General .21
5.1.1 Standard atmospheric conditions for testing .21
5.1.2 Specimen configuration .22
5.1.3 Mounting and orientation .22
5.1.4 Electrical connection .22
5.1.5 Provision for tests .22
5.2 Functional test .22
5.2.1 Object of test .22
5.2.2 Test schedule .22
5.2.3 Fire alarm condition .23
5.2.4 Fault warning condition .23
5.2.5 Disabled condition .
...