Overview
IEC 62386-150:2023 is an international standard published by the International Electrotechnical Commission (IEC) that defines particular requirements for auxiliary (AUX) power supplies used in digital addressable lighting interfaces (DALI). This standard complements other parts in the IEC 62386 series by specifying the minimum electrical and safety requirements for AUX power supplies that provide power to loads such as sensors, controllers, and communication devices within a DALI system.
The auxiliary power supply covered by IEC 62386-150:2023 typically delivers 24 V DC power, designed to eliminate the need for separate AC/DC converters in certain applications. This helps reduce complexity, surge suppression needs, and electromagnetic interference (EMI) filtering requirements. It supports powering devices like occupancy sensors, photo sensors, and communication modules that are integral to smart lighting control systems.
Key Topics
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Scope and Purpose
IEC 62386-150:2023 prescribes the essential technical requirements for AUX power supplies within DALI systems to ensure interoperable and reliable device operation. It complements the general system and control gear requirements specified in IEC 62386-101 and IEC 62386-102.
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Electrical Specifications
- Nominal operating voltage: 24 V DC with a tolerance of ±10% (21.6 V to 26.4 V).
- Load capability: Average power output of 3 W and pulse power output up to 6 W for short durations.
- Output voltage maximum does not exceed 30 V, even under no-load conditions.
- Start-up time for the AUX supply to reach 90% of nominal voltage is under 600 ms after mains power application.
- Ripple voltage for high-frequency noise (above 10 kHz) is limited to 1.0 V peak-to-peak.
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Interface Marking
The AUX power supply interface must be clearly marked with “+24 V” and “GND” designations. If integrated with a bus power supply, the ground (GND) must be shared with the DALI common node (DA−).
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Safety and Protection
The specification includes requirements for electrical safety ratings and provisions for output overload and short circuit protection to ensure safe operation within DALI lighting control systems.
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Combination with Other DALI Components
The AUX power supply can either be a standalone unit or integrated within control gear, control devices, or bus power supplies, providing flexibility for different lighting installation designs.
Applications
IEC 62386-150:2023 is essential for manufacturers and designers of DALI-compliant lighting control equipment that require auxiliary power functionality. Typical applications include:
- Powering occupancy and photo sensors in smart lighting systems to enable energy-efficient control.
- Supplying communication devices within lighting networks to ensure robust digital signal transmission.
- Providing auxiliary power in integrated lighting modules where space and electromagnetic compatibility are critical.
- Facilitating easier system design by eliminating the need for separate AC/DC converters and filters for auxiliary devices.
By following this standard, system integrators ensure compatibility and reliable performance of auxiliary powered components in digital lighting environments, advancing building automation and energy savings goals.
Related Standards
- IEC 62386-101:2022 - General requirements for system components within digital addressable lighting interfaces.
- IEC 62386-102 - Defines general requirements for control gear in DALI systems including power conversion and control electronics.
- IEC 62386-250 (Under preparation) - Particular requirements for integrated power supplies (device type 49), potentially relevant for integrated AUX power supply solutions.
These standards collectively form a comprehensive framework supporting the interoperability, safety, and performance of modern digital lighting control systems, including the AUX power supply detailed in IEC 62386-150:2023.
Keywords: IEC 62386-150, auxiliary power supply, digital addressable lighting interface, DALI, 24 V DC power supply, lighting control standards, sensor power supply, lighting communication device, lighting system integration, IEC standards for lighting.
Open preview (PDF)Digital addressable lighting interface – Part 150: Particular requirements - Auxiliary power supply
