Overview
IEC 62386-302:2017 (consolidated with AMD1:2024) is part of the Digital Addressable Lighting Interface (DALI) family of standards. It specifies particular requirements for absolute input devices used in DALI lighting control systems - devices whose state is deterministic (for example, a slider position or a switch position between defined end points). The standard covers a digital bus system for controlling electronic lighting equipment (aligned with IEC 61347 requirements) and includes provisions for DC supplies.
This standard is intended to be used together with IEC 62386-103 (general requirements for input/control devices) and sits within the broader IEC 62386 series for DALI-compatible lighting control.
Key Topics and Requirements
- Scope and applicability: Defines absolute input devices that report a deterministic state to a DALI bus and interact with other IEC 62386 parts.
- Electrical and power requirements: Interface power supply and insulation rules consistent with system safety expectations.
- Transmission protocol and timing: Structure of bus messages and timing constraints to ensure reliable reporting and control.
- Method of operation / Instance model: Instance types, mapping of physical input signals to the standardized inputValue, and relation tables for signal interpretation.
- Event handling: Encoding, priority usage, event generation and bus usage for position and state events.
- Configuration parameters: Timers and filters such as SET REPORT TIMER and SET DEADTIME TIMER, event filters and manual configuration capabilities.
- Commands and messages: Standard device and instance commands including INPUT NOTIFICATION and POWER NOTIFICATION, device queries and configuration instructions.
- Error and exception handling: Manufacturer-specific errors, error value definition and instance error reporting.
- Application examples: Normative annex showing wiring/examples for single switches, rotary switches and sliders.
Practical Applications
- Design and manufacture of DALI-compatible absolute input devices (sliders, potentiometers, rotary switches, multi-position switches).
- Integration of absolute controls into building automation and smart lighting systems where deterministic input state is required.
- Firmware and system developers implementing DALI device instances, event encoding, timers and command handling.
- System integrators, lighting designers and specifiers creating reliable human interfaces for dimming, scene control or position-based inputs.
- Test labs and certification bodies verifying compliance with IEC 62386 series requirements.
Who Should Use This Standard
- Product manufacturers of input devices and lighting control gear
- Firmware and embedded systems engineers working on DALI implementations
- Lighting system integrators and installers
- Certification bodies and test laboratories
- Architects and lighting designers requiring compliance and interoperability
Related Standards
- IEC 62386-101 / -102 / -103 (general system and control device requirements)
- IEC 61347 (requirements for lamp controlgear)
- Other parts of the IEC 62386 DALI series
Keywords: IEC 62386-302:2017, DALI, digital addressable lighting interface, absolute input devices, lighting control, inputValue, report timer, deadtime timer, input notification, bus protocol.
Open preview (PDF)Digital addressable lighting interface - Part 302: Particular requirements - Input devices - Absolute input devices
