Standards

This technical report presents an overview and guidance for the IEC 61158 series. IT explains the structure and content of IEC 61158, shows how to use it in combination with IEC 61784, and relates the structure to the ISO/IEC 7498 OSI basic reference model.

This part of IEC 61158 specifies the requirements for fieldbus component parts. It also specifies the media and network configuration requirements necessary to ensure agreed levels of a - data integrity before data link layer error checking . b - interoperability devices at the physical layer.

This part of IEC 61158 provides basic time-critical messaging communications between devices in an automation environment. The term time-critical is used to represent the presence of a time- window, within which one or more specified actions are required to be completed with some defined level of certainty . Failure to complete specified actions within risk to time window risk failure of the applications requesting the actions with attendant risk to equipment, plant and possibly human life.

The fieldbus data link layer provide basic time-critical messaging communication between devices in an automation environment. The purpose of this part of IEC 61158 is to define eight distinct and non- interoperable fieldbus Data link protocols. Each protocol defined in this standard is most most closely related to and lies within the field of application of the corresponding services of IEC 61158-3. the fieldbus data link services definition .

The fieldbus application layer (FAL) provides user programs with a means to access the fieldbus communication . In this respect the FAL can be viewed as a window between corresponding application programs.

The fieldbus Application layer (FAL) provides user provides user with a means the fieldbus communication environment in this respect the FAL can be viewed as a window between corresponding application programs.

The fieldbus application layer (FAL) is an application layer communication standard designed to support the conveyance of time-critical application requests and responses among devices in an automation environment. The term time-critical is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions with attendant risk to equipment plant and possibly human life.

This part of IEC 61300 identifies two basic measurement methods for characterizing the spectral transfer functions of DWDM filter components. The transfer functions can be used to produce measurements of attenuation (A), polarization dependent loss (PDL), isolation , center wavering and bandwidth (BW)

This international standard specifies the performance and the functional characteristics of the electrical supply systems required for the instrumentation and control (I&C) systems important to safety of a nuclear power plant. Guidance is also given on the possible use of these supplies for other I&C systems

This part of IEC 61241 is application to electrical apparatus by enclosures and surface temperature limitation for use in areas where combustion dust may be present in quantities which could lead to a fire or explosion hazard . It specifies requirements for design construction and testing of electrical apparatus. This standard supplements the general requirements IEC 61241-0.