ISO 23316-6:2024

Overview

ISO 23316-6:2024 defines the communication signals for the electrical high‑power interface (HPI) used in modern agricultural and forestry machinery operating at 700 V DC / 480 V AC. It specifies how parameters, signals and objects are exchanged between a supply system (SS) - including the power converter/switch and HPI‑master control (HPI‑MC) with a TIM (Tractor‑Implement Management) server - and a consumer system (CS) - including application (APP) and HPI‑control (HPI‑C) with a TIM client and task controller. The document covers communication needed during identification, initialization, normal operation and shutdown.

Key topics and technical requirements

• Communication process & system handshake: defined phases, preconditions and monitoring required to safely establish and maintain HPI connections.
• System topologies: overview of AC and DC system topologies and how they affect communication.
• Fieldbus‑based and IL‑based systems: identification, initialization and normal operation sequences for both fieldbus (e.g., ISOBUS) and isolation‑link (IL) implementations.
• HPI interlock function: functional requirements and principles for interlock signalling to protect equipment and personnel.
• Connection status & TIM interaction: requirements for HPI connection status monitoring and interaction with the TIM function state machine.
• Insulation monitoring & isolation resistance: communication procedures for insulation monitoring (OIM) and minimum isolation resistance checks during initialization and online operation.
• Diagnostics & annexes: includes normative communication signal listings (Annex A), ISOBUS message guidance (Annex B), topology examples, diagnostic trouble codes (DTCs) and insulation monitoring examples.

Note: ISO 23316‑6 does not define SPNs/PGNs or message parameter numbers - these are provided by ISO 11783 and SAE J1939.

Applications and who uses it

• Tractor and implement manufacturers: design interoperable high‑power electrical interfaces and TIM implementations.
• Power converter and HPI suppliers: ensure compatible signalling, handshake logic and interlocks.
• System integrators and OEMs: implement safe startup/shutdown and communication sequences for electrified implements.
• Testing labs & certification bodies: verify compliance with handshake, insulation monitoring and fieldbus sequences.
• Standards and safety engineers: align electrical, mechanical and communication requirements across the ISO 23316 series.

Related standards

• ISO 23316 (Parts 1–7) - series for high‑power interfaces
• ISO 11783 (ISOBUS) - message/PGN/SPN definitions and application layer
• SAE J1939 - heavy‑duty vehicle network messaging
• ISO 16230‑1, ISO 23316‑1/2/4/5/7, IEC 60204 - normative references used by ISO 23316‑6

Keywords: ISO 23316‑6, electrical high‑power interface, 700 V DC, 480 V AC, communication signals, HPI‑MC, HPI‑C, TIM, ISOBUS, insulation monitoring, agricultural machinery.