IEC 61158-4-21:2023
Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements
Available Formats:
- Availability: Immediate Download
- Language: English
- License Type: Single User
- Updates: Not Included
- Availability: Request Quote
- Language: English
- License Type: Enterprise / Multi User
- Updates: Included
About This Item
IEC 61158-4-21:2023 defines the data-link layer protocol specification for Type 21 elements within the Industrial communication networks - Fieldbus specifications series. It is relevant when teams need a technical document that supports protocol-level evaluation, engineering documentation, and compliance workflows for fieldbus-based automation systems. For organizations reviewing network behavior, interoperability, or implementation requirements, IEC 61158-4-21:2023 provides a focused reference point for technical assessment and documented evaluation during design, testing, and procurement activities.
What is IEC 61158-4-21:2023?
This document is the third edition of IEC 61158-4-21:2023 and serves as the primary technical reference for the data-link layer protocol specification associated with Type 21 elements. Based on its title, it is intended to define communication-layer behavior that can be used in engineering review, implementation verification, and conformity assessment preparation. It is typically consulted by developers, system integrators, and compliance teams that need a structured reference for protocol-oriented technical validation and operational consistency in fieldbus environments.
Applications of IEC 61158-4-21:2023
IEC 61158-4-21:2023 is commonly used in industrial communication projects where fieldbus network behavior must be understood, specified, or checked against a formal reference. It may support product evaluation, laboratory evaluation, and verification activities for automation equipment, control systems, and related network interfaces. Procurement teams and engineering groups can also use it during technical review to compare vendor documentation, confirm protocol alignment, and prepare compliance workflows for systems that rely on deterministic industrial communication.
Why is IEC 61158-4-21:2023 important?
This document matters because data-link layer specifications often influence interoperability, testing consistency, and risk management across industrial networks. When organizations need to validate communication behavior or prepare conformity assessment evidence, a clearly defined protocol reference helps reduce ambiguity in technical review and implementation decisions. It also supports quality assurance by giving engineering and compliance teams a common basis for checking functional alignment, documenting requirements, and coordinating procurement decisions for equipment that must integrate reliably within a fieldbus architecture.
- Data-link layer protocol reference for Type 21 fieldbus elements
- Useful for engineering documentation and implementation review
- Supports verification activities and laboratory-based technical assessment
- Helps align procurement and compliance workflows with protocol requirements
- Relevant to interoperability checks and conformity assessment preparation
- Publication Date: 2023-03-28
- Standard Status: Original
- Publisher: IEC
- Edition: 3
- This Version: IEC 61158-4-21:2023 (2023-03-28)
Please request information about the document. Contact Page
Need This Standard?
Request a personalized quote today to receive the latest edition in PDF or other available formats.
Need This Standard?
Request a personalized quote today to receive the latest edition in PDF or other available formats.
Summarize with AI
Get quick summaries using your favorite AI engine.
Online Standart Disclaimer
OnlineStandart.com is an authorized reseller of international standards, operating through partnerships with authorized distributors. We do not own the copyrights or trademarks of the standards we sell, including but not limited to those of API, ASHRAE, BSI, SAE, ASTM, IEEE, IEC, ASME, ISO, and others.
All product names, logos, and brands are the property of their respective owners and are used for identification purposes only; their use does not imply endorsement. OnlineStandart.com is not affiliated with or endorsed by any standards development organization unless explicitly stated. The content of this document is for informational purposes only and is intended to promote our licensed reselling services.
Online Standart does not host, distribute, or link to free, unlicensed, or uncertified copies of copyrighted standards. Every document we deliver is a licensed copy obtained through authorized channels and supplied with full licensing documentation. The “Free PDF Download” option on our product pages refers to this free informational document — never to a free copy of any standard.