IEC 61500-2018 pdf download.Nuclear power plants – Instrumentation and control systems important to safety – Data communication in systems performing category A functions.
This document establishes requirements for data communication which is used in systems performing category A functions in nuclear power plants. It covers also interface requirements for data communication of equipment performing category A functions with other systems including those performing category B and C functions and functions not important to safety.
The scope of this document is restricted to the consideration of data communication within the plant I&C safety systems. It does not cover communication by telephone, radio, voice, fax, email, public address, etc.
The internal operation and the detailed technical specification of data communication equipment are not in the scope of this document. This document is not applicable to the internal connections and data communication of a processor unit, its memory and control logic. It does not address the internal processing of instrumentation and control computer based systems. This document gives requirements for functions and properties of on-line plant data communication by reference to IEC 60880 and IEC 60987, produced within the framework of IEC 61 51 3. It requires categorisation of the communication functions in accordance with IEC 61 226, which in turn requires environmental and seismic qualification (i.e., the environment where the safety function is required to operate) according to IEC/IEEE 60780-323 and IEC 60980.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60671 :2007, Nuclear power plants – Instrumentation and control systems important to safety – Surveillance testing IEC 60709, Nuclear power plants – Instrumentation and control systems important to safety – Separation
IEC/IEEE 60780-323:201 6, Nuclear facilities – Electrical equipment important to safety – Qualification
IEC 60880:2006, Nuclear power plants – Instrumentation and control systems important to safety – Software aspects for computer-based systems performing category A functions IEC 60980, Recommended practices for seismic qualification of electrical equipment of the safety system for nuclear generating stations
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60880, IAEA safety glossary, IAEA safety guide No. SSG-39 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 communication channel
logical connection between two end-points within a communication system
[SOURCE: IEC 61 784-3:201 6, 3.1 .8]
3.2 communication node
connection point on a communication network, at which data is conveyed via communication channels to or from that point to other points on the network
3.3 communication system
arrangement of hardware, software and propagation media to allow the transfer of messages (ISO/IEC 7498-1 application layer) from one application to another
[SOURCE: IEC 61 784-3:201 6, 3.1 .9].IEC 61500 pdf download.