IEC 61784-3-8:2010 pdf free download Industrial communication networks – Profiles – Part 3-8: Functional safety fieldbuses – Additional specifications for CPF 8
1 scope
This part of the IEC 61784-3 series specifies a safety communication layer (services andprotocol) based on CPF 8 of lEC 61784-1 and lEC 61158 Type 18. It identifies the principlesfor functional safety communications defined in lEC 61784-3 that are relevant for this safetycommunication layer.
NOTE 1 lt does not cover electrical safety and intrinsic safety aspects. Electrical safety relates to hazards suchas electrical shock. Intrinsic safety relates to hazards associated with potentially explosive atmospheres.
This part 1 defines mechanisms for the transmission of safety-relevant messages amongparticipants within a distributed network using fieldbus technology in accordance with therequirements of lEC 61508 series2 for functional safety. These mechanisms may be used invarious industrial applications such as process control,manufacturing automation andmachinery.
This part provides guidelines for both developers and assessors of compliant devices andsystems.
NOTE 2The resulting SIL claim of a system depends on the implementation of the selected functional safetycommunication profile within this system – implementation of a functional safety communication profile according tothis part in a standard device is not sufficient to qualify it as a safety device.
2 Normative references
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60204-1，Safety of machinery – Electrical equipment of machines – Part 1: Generalrequirements
IEC 61131-2,Programmable controllers – Part 2: Equipment requirements and testsIEC 61158 (all parts),Industrial communication networks – Fieldbus specifications
IEC 61158-2，Industrial communication networks – Fieldbus specifications – Part 2: Physicallayer specification and service definition
IEC 61158-3-18,Industrial communication networks – Fieldbus specifications – Part 3-18;Data-link layer service definition – Type 18 elements
IEC 61158-4-18,Industrial communication networks – Fieldbus specifications – Part 4-18:Data-link layer protocol specification – Type 18 elements
IEC 61158-5-18，Industrial communication networks – Fieldbus specifications – Part 5-18:Application layer service definition – Type 18 elements
IEC 61158-6-18，Industrial communication networks – Fieldbus specifications – Part 6-18:Application layer protocol specification – Type 18 elements
IEC 61326-3-1，Electrical equipment for measurement,control and laboratory use – EMCrequirements – Part 3-1: lmmunity requirements for safety-related systems and for equipmentintended to perform safety related functions (functional safety) – General industrialapplications
IEC 61326-3-2，Electrical equipment for measurement，control and laboratory use – EMCrequirements – Part 3-2: lmmunity requirements for safety-related systems and for equipmentintended to perform safety related functions (functional safety) – lndustrial applications withspecified electromagnetic environment
IEC 61508 (all parts),Functional safety of electricalelectronic/programmable electronicsafety-related systems
IEC 61511 (all parts)，Functional safety – Safety instrumented systems for the processindustry sector
IEC 61784-1,Industrial communication networks – Profiles – Part 1: Fieldbus profiles
IEC 61784-3:20103 Industrial communication networks – Profiles – Part 3: Functional safetyfieldbuses – General rules and profile definitions
IEC 62061,Safety of machinery – Functional safety of safety-related electrical, electronic andprogrammable electronic control systems
3 Terms, definitions,symbols,abbreviated terms and conventions
3.1 Terms and definitions
For the purposes of this document,the following terms and definitions apply.
3.1.1Common terms and definitions
3.1.1.1
availability
probability for an automated system that for a given period of time there are no unsatisfactorysystem conditions such as loss of production
3.1.1.2
black channel
communication channel without available evidence of design or validation according toIEC 61508
3.1.1.3
communication channel
logical connection between two end-points within a communication system
IEC 61784-3-8:2010 pdf free download
