ISO 17987-8:2019 PDF

Road vehicles — Local Interconnect Network (LIN) — Part 8: Electrical physical layer (EPL) specification: LIN over DC powerline (DC-LIN)

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Title (English):

ISO 17987-8:2019

Road vehicles — Local Interconnect Network (LIN) — Part 8: Electrical physical layer (EPL) specification: LIN over DC powerline (DC-LIN)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 56
Publication date:: October 7, 2019
Edition:: ISO IS 17987 edition 1 version 1
ICS:: 43.040.15

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Description (English):

This document specifies an additional electrical physical layer (EPL) for the Local Interconnect Network (LIN) of the ISO 17987 series. It specifies the transmission over DC powerline without affecting the LIN higher layers, hereafter named DC-LIN. The DC-LIN EPL uses a high-frequency modulated carrier to propagate UART bytes (byte-oriented) over the DC powerline. This document specifies the electrical characteristics, the modulation method of the transmission, and how to impose the carrier signal on the DC powerlines. The DC-LIN EPL supports bit rates of 9 615 bit/s, 10 417 bit/s, and 19 230 bit/s. The DC-LIN EPL is applicable for a wide range of DC powerlines including 12-V and 24-V operations, allowing communicating between different DC powerlines via a coupling capacitor. A DC-LIN EPL interface to powerline example is described in Annex A.

Technical details

Technical committee: ISO/TC 22/SC 31 - Data communication
SKU: ISO 17987-8:2019

Abstract

Overview

ISO 17987-8:2019 defines the electrical physical layer (EPL) for running the Local Interconnect Network (LIN) protocol over vehicle DC powerlines - a profile commonly called DC-LIN. The standard specifies how UART-style LIN bytes are transmitted over the vehicle 12 V and 24 V DC power distribution network using a high‑frequency modulated carrier, without changing LIN higher‑layer behavior. It includes electrical characteristics, modulation methods, carrier injection techniques and conformance test requirements.

Key topics and technical requirements

EPL scope and compatibility
- Adds a DC powerline physical layer to the ISO 17987 LIN family while preserving LIN higher layers.
- Applicable across common vehicle power systems (12 V and 24 V) and supports communication between different powerlines via a coupling capacitor.
Modulation and data framing
- Uses a high‑frequency modulated carrier to propagate byte‑oriented UART data (byte fields) over the DC powerline.
- Byte synchronization via a sync preamble and phase‑based modulation for byte, break and wake‑up fields (byte field, break field, wake‑up signal schemes are specified).
Supported bit rates
- 9 615 bit/s, 10 417 bit/s, and 19 230 bit/s (nominal).
Transmitter / receiver characteristics
- Electrical transmitter and receiver requirements, line‑in/line‑out interfaces, and monitoring thresholds are specified.
Timing and tolerance
- Bit timing, bit sampling, TXD timeouts and inter‑node timing delays are defined for deterministic behavior.
Electrical parameters & EMC
- Coupling capacitor requirements, signal injection methods, ESD compliance and line monitoring definitions are covered.
Conformance and testing
- Annex B contains a conformance test plan; Annex A gives a peripheral interface example and implementation considerations.
Normative references
- Cross‑references to ISO 17987 parts (e.g., Part 4, Part 6) and IEC 61000‑4‑2 (ESD testing).

Practical applications and who uses this standard

Automotive OEMs and Tier‑1 suppliers: to design LIN networks that reuse vehicle power wiring, reduce harness complexity and enable low‑cost control networks (e.g., door modules, HVAC, body electronics).
Hardware and IC designers: for designing transceivers, coupling interfaces and MCU peripherals supporting DC‑LIN EPL.
Test labs and certification bodies: to validate conformance against the Annex B test plan and EMC/ESD requirements.
Vehicle integrators and system architects: for planning mixed LIN/powerline communication topologies and ensuring interoperability across 12 V and 24 V systems.
Aftermarket and retrofit suppliers: where powerline-based LIN can simplify installation or add functionality without extra communication harnesses.

Related standards

ISO 17987 series (Parts 1–7) - LIN architecture, protocol, API and EPL (12 V/24 V)
ISO 17987-4:2016 (EPL 12 V/24 V)
ISO 17987-6 (Protocol conformance tests)
IEC 61000-4-2 (ESD testing)

Keywords: ISO 17987-8, DC-LIN, LIN over DC powerline, Local Interconnect Network, electrical physical layer, automotive powerline communication, 12V, 24V, LIN EPL, conformance test plan.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

EPL scope and compatibility
- Adds a DC powerline physical layer to the ISO 17987 LIN family while preserving LIN higher layers.
- Applicable across common vehicle power systems (12 V and 24 V) and supports communication between different powerlines via a coupling capacitor.
Modulation and data framing
- Uses a high‑frequency modulated carrier to propagate byte‑oriented UART data (byte fields) over the DC powerline.
- Byte synchronization via a sync preamble and phase‑based modulation for byte, break and wake‑up fields (byte field, break field, wake‑up signal schemes are specified).
Supported bit rates
- 9 615 bit/s, 10 417 bit/s, and 19 230 bit/s (nominal).
Transmitter / receiver characteristics
- Electrical transmitter and receiver requirements, line‑in/line‑out interfaces, and monitoring thresholds are specified.
Timing and tolerance
- Bit timing, bit sampling, TXD timeouts and inter‑node timing delays are defined for deterministic behavior.
Electrical parameters & EMC
- Coupling capacitor requirements, signal injection methods, ESD compliance and line monitoring definitions are covered.
Conformance and testing
- Annex B contains a conformance test plan; Annex A gives a peripheral interface example and implementation considerations.
Normative references
- Cross‑references to ISO 17987 parts (e.g., Part 4, Part 6) and IEC 61000‑4‑2 (ESD testing).

Practical applications and who uses this standard

Automotive OEMs and Tier‑1 suppliers: to design LIN networks that reuse vehicle power wiring, reduce harness complexity and enable low‑cost control networks (e.g., door modules, HVAC, body electronics).
Hardware and IC designers: for designing transceivers, coupling interfaces and MCU peripherals supporting DC‑LIN EPL.
Test labs and certification bodies: to validate conformance against the Annex B test plan and EMC/ESD requirements.
Vehicle integrators and system architects: for planning mixed LIN/powerline communication topologies and ensuring interoperability across 12 V and 24 V systems.
Aftermarket and retrofit suppliers: where powerline-based LIN can simplify installation or add functionality without extra communication harnesses.

Related standards

ISO 17987 series (Parts 1–7) - LIN architecture, protocol, API and EPL (12 V/24 V)
ISO 17987-4:2016 (EPL 12 V/24 V)
ISO 17987-6 (Protocol conformance tests)
IEC 61000-4-2 (ESD testing)

Keywords: ISO 17987-8, DC-LIN, LIN over DC powerline, Local Interconnect Network, electrical physical layer, automotive powerline communication, 12V, 24V, LIN EPL, conformance test plan.

ISO 17987-8:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and who uses this standard

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and who uses this standard

Related standards

Related standards

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