Question
D4i (DALI for IoT) is the DALI-2 extension aimed at connected luminaires (smart luminaires), adding standardised support for IoT data: energy consumption, lifecycle (operating hours, switching cycles), GPS positioning and manufacturer identification.
DALI-2Mock examD4i (DALI-2 + IoT)Hard
Answer
True
D4i layers a set of standardised IoT memory banks on top of DALI-2: MB201/202 hold luminaire diagnostic and asset data (vendor, GTIN, model), MB203/204 hold energy data (cumulative kWh, instantaneous W), MB205 holds luminaire features, and MB206 holds control-gear health (temperature, cycles). The result is real-time monitoring of each street-lighting luminaire and predictive maintenance, making D4i the de-facto standard for modern outdoor lighting.
Preparation tip
When choosing D4i drivers, confirm support for the specific memory banks your platform actually reads — many drivers are labelled 'D4i certified' yet only populate a subset.
Waitlist
DALI-2 bank in preparation
The full DALI-2 bank isn't available yet. Drop your email to get notified at launch and grab an early-bird discount.
Join the waitlist →Want more?
See the 9 other DALI-2 practice questions
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
- 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.2. Devices · Typ 1 Notbeleuchtung
- DALI-2 supports several application controllers active on the same bus (multi-master), with an arbitration mechanism that prevents conflicts when two controllers try to command the same control gear at the same time.4. Application Controllers · Multi-Master
- DALI bus power supplies are typically available at 100, 120, 150 or 250 mA depending on the vendor (ABB BCO/S, Tridonic DALI-PS, Lunatone PS5), and should be sized for the cumulative current of control gear plus input devices, with a 30 percent margin.7. Best practices · Bus-Netzteil