DALI-2 Becomes Standard for Emergency Lighting
DALI-2 certified solutions are rapidly becoming the baseline for emergency lighting in modern offices and public buildings. According to *Security Buyer Magazine*, the trend is driven by the need to integrate emergency systems with broader building management and security platforms. The protocol's enhanced interoperability and monitoring capabilities are seen as crucial for improving both occupant safety and operational efficiency.
- The DALI-2 certification for emergency lighting is based on Part 202 of the international standard IEC 62386. This standard mandates specific communication protocols for self-contained emergency control gear, including commands for automated function and duration tests, and standardized feedback on battery health and lamp status. The second edition, IEC 62386-202:2022, introduced technical revisions such as an installation inhibit feature and updated modes of operation. - A key advantage of DALI-2 is its mandatory, independently verified certification process overseen by the Digital Illumination Interface Alliance (DiiA), which ensures interoperability between devices from different manufacturers. This contrasts with the original DALI version-1, which relied on self-declaration and sometimes resulted in compatibility issues. The first DALI-2 certified LED driver for emergency lighting was released by Tridonic. - DALI-2 systems automate the legally required periodic testing of emergency lighting, reducing manual labor and potential for human error. The system can automatically trigger and log function tests (quick checks of the battery, lamp, etc.) and duration tests (ensuring the battery can power the lamp for its full rated time), providing digital records for compliance. - The protocol allows for individual control and monitoring of up to 64 control gear devices and 64 control devices on a single bus. This enables facility managers to get real-time status updates and diagnostic data from each emergency fixture, including battery charge levels and lamp operating hours, via a central controller or building management system. - While the original DALI protocol focused primarily on control gear like ballasts and drivers, DALI-2 expands to include standardized control devices such as sensors and push buttons. This allows for more sophisticated and integrated building-wide lighting control strategies. - The D4i certification is an extension of DALI-2 that standardizes power and data for intra-luminaire DALI systems. For emergency lighting, this can include luminaire-specific data (Part 251), energy usage reporting (Part 252), and diagnostics (Part 253), allowing for predictive maintenance and detailed performance monitoring.
