IEC 60839-7-5

Alarm systems - Part 7-5: Message formats and protocols for serial data interfaces in alarm transmission systems - Alarm system interfaces employing a two-wire configuration in accordance with ISO/IEC 8482

Specifies the requirements for standard interfaces using a two-wire connection employing ISO/IEC 8482 signalling for use between the control and indicating equipment of an alarm system and one or more alarm system transceivers connected to alarm transmission systems.

Systèmes d'alarme - Partie 7-5: Formats de message et protocoles pour les interfaces de données série dans les systèmes de transmission d'alarme - Interfaces de systèmes d'alarme utilisant une configuration bifilaire conforme à ISO/CEI 8482

Spécifie les exigences des interfaces normalisées utilisant une liaison bifilaire répondant à la signalisation ISO/CEI 8482 et destinée à être utilisée entre la centrale (matériel de commande et d'affichage  CIE) d'un système d'alarme et un ou plusieurs transmetteurs de système d'alarme reliés aux systèmes de transmission d'alarme.

Alarm systems - Part 7-5: Message formats and protocols for serial data interfaces in alarm transmission systems - Alarm system interfaces employing a two-wire configuration in accordance with ISO/IEC 8482

General Information

• Status: Not Published
• ICS: 13.320 - Alarm and warning systems
• Technical Committee: TC 79 - Alarm and electronic security systems
• Current Stage: PPUB - Publication issued
• Start Date: 09-Mar-2001
• Ref Project: SIST IEC 60839-7-5:2002 - Alarm systems - Part 7-5: Message formats and protocols for serial data interfaces in alarm transmission systems - Alarm system interfaces employing a two-wire configuration in accordance with ISO/IEC 8482

Overview

IEC 60839-7-5 defines message formats and protocols for serial data interfaces in alarm transmission systems using a two‑wire configuration in accordance with ISO/IEC 8482. It specifies the physical, data link, transport and application‑layer requirements for interfaces between Control and Indicating Equipment (CIE) and alarm system transceivers, enabling interoperable connections over twisted‑pair multipoint wiring.

Keywords: IEC 60839-7-5, alarm systems, two‑wire configuration, ISO/IEC 8482, serial data interfaces, alarm transmission systems, CIE, transceiver.

Key topics and technical requirements

• Scope and purpose
  • Defines a flexible, standard interface permitting a single master CIE to communicate with multiple transceivers or slave CIEs using ISO/IEC 8482 signalling.
• Layered protocol alignment
  • Application layer: supports the common application protocol from IEC 60839‑7‑2.
  • Transport layer: uses transport conventions and block formats in IEC 60839‑7‑4; CIE acts as ORIGINATOR, transceiver as RECEIVER.
  • Data link layer: adopts IEC 60839‑7‑3 data link protocol with Master/Slave configuration rules and reconfiguration behaviour.
• Master/Slave rules
  • All transceivers can be SLAVE (or optionally MASTER); CIEs can be MASTER or SLAVE.
  • Single CIE on link must be MASTER; multi‑CIE arrangements specify which device is MASTER and how takeover and initialization occur.
• Error handling and monitoring
  • Failed transmissions must generate failure messages to the sender and optionally to a network monitoring centre.
  • Connection integrity must be monitored; both failure and restoration must be reported and message‑logged.
• Physical layer
  • Uses ISO/IEC 8482 signal levels over two‑wire twisted pair.
  • Octet format: lowest‑value bit first, leading START bit, trailing STOP bit; optional parity bit.
  • Link shall support 4 800 Bd (with allowance for alternative rates).

Applications and who uses this standard

• Manufacturers of alarm control panels, alarm transceivers and communications modules to ensure interoperability.
• System integrators and installers designing multipoint twisted‑pair alarm links between CIEs and transceivers.
• Security installers and service organisations implementing reliable alarm reporting and fault monitoring.
• Testing and certification labs verifying conformity to IEC and ISO/IEC signalling and protocol layers.
• Alarm receiving centres and network operators requiring defined message formats and failure reporting.

Related standards

• IEC 60839‑7‑1 (General)
• IEC 60839‑7‑2 (Application layer)
• IEC 60839‑7‑3 (Data link layer)
• IEC 60839‑7‑4 (Transport layer)
• ISO/IEC 8482 (Twisted pair multipoint interconnections)

This standard is essential when implementing robust, interoperable two‑wire serial alarm interfaces compliant with IEC and ISO signalling and layered protocol definitions.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2002
Alarm systems - Part 7-5: Message formats and protocols for serial data interfaces
in alarm transmission systems - Alarm system interfaces employing a two-wire
configuration in accordance with ISO/IEC 8482
Alarm systems - Part 7-5: Message formats and protocols for serial data interfaces in
alarm transmission systems - Alarm system interfaces employing a two-wire
configuration in   accordance with ISO/IEC 8482
Systèmes d'alarme - Partie 7-5: Formats de message et protocoles pour les interfaces
de données série dans les systèmes de     transmission d'alarme - Interfaces de
systèmes d'alarme utilisant une configuration bifilaire conforme à ISO/CEI 8482
Ta slovenski standard je istoveten z: IEC 60839-7-5
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
60839-7-5
INTERNATIONAL
Première édition
STANDARD
First edition
2001-03
Systèmes d'alarme –
Partie 7-5:
Formats de message et protocoles pour
les interfaces de données série dans
les systèmes de transmission d'alarme –
Interfaces de systèmes d'alarme utilisant une
configuration bifilaire conforme à l'lSO/CEI 8482
Alarm systems –
Part 7-5:
Message formats and protocols for serial
data interfaces in alarm transmission systems –
Alarm system interfaces employing a two-wire
configuration in accordance with ISO/IEC 8482
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60839-7-5 © IEC:2001 – 3 –
CONTENTS
FOREWORD.5
1 Scope.9
2 Normative references.9
3 Definitions .9
4 Abbreviations.9
5 Layer 7 – Application functions.11
6 Layer 4 – Transport .11
7 Layer 2 – Data link.11
8 Layer 1 – Physical.13
8.1 Transmitted octets.13
8.2 Signal levels .13
8.3 Transmission rate.13

60839-7-5 © IEC:2001 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ALARM SYSTEMS –
Part 7-5: Message formats and protocols for serial data interfaces
in alarm transmission systems –
Alarm system interfaces employing a two-wire configuration
in accordance with ISO/IEC 8482
FOREWORD
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International Standard IEC 60839-7-5 has been prepared by IEC technical committee 79: Alarm
systems.
This bilingual version (2001-11) replaces the English version.
The text of this standard is based on the following documents:
FDIS Report on voting
79/202/FDIS 79/212/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
The committee has decided that the contents of this pub
...