Self-contained emergency luminaires (DT1) under DALI-2 support standardised commands for the monthly function tests and annual duration tests required by EN 50172, and these tests can be automated from a central DALI-2 controller.
True
DT1 defines an emergency-specific command set: Function Test (short test, around 30 s, to verify battery-driven turn-on); Duration Test (1 to 3 hours depending on category, to verify autonomy); Inhibit / Re-light for maintenance windows; and Status reporting (battery OK, lamp fault, replacement required). Together they replace the manual walk-round inspection with automated tests and a centralised log, producing substantial savings in buildings with 50+ emergency luminaires.
Schedule duration tests for low-occupancy windows (Sunday nights) — a failing battery during the test leaves the luminaire dark for several hours afterwards while it recharges.
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Related questions
- DALI-2 (IEC 62386 Edition 2, 2014+) is the major evolution of DALI v1, adding native support for input devices (sensors, push-buttons) directly on the DALI bus itself, together with a product certification programme administered by the DALI Alliance (DiiA).1. Architecture · DALI vs DALI-2
- The DALI bus uses a polarity-free twisted pair (no + / - orientation), with Manchester coding at 1 200 baud over a nominal 22.5 V DC supply, and is allowed to share the same multi-core cable as the 230 V mains feeding the luminaires.1. Architecture · Physikalische Schicht
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- A DALI DT1 Function Test simulates a 30-second mains outage to verify that the emergency luminaire switches over to battery; the result (OK / Battery Fault / Lamp Fault) is reported back to the controller for an EN 50172-compliant audit trail.13. Emergency DT1 · Function Test