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DALI Cabling
DALI and DSI use mains rated non-polarized cabling; typically, a single pair "figure-8" cable or more often
combined with lighting gear supply cabling, DALI has free wiring topology (daisy-chain, star or combined) but ring
shaped connections should be avoided. No termination resistor is required.
Safety warning: DALI is not touch-safe and shall be treated as FELV (functional isolation only, not
A
Safety) per IEC Classification. DALI could be at a mains potential (LIVE), because only basic isolation is
provided. The DALI control cable must be handled as any other LIVE mains cable, potentially up to 230
VAC. This must be considered when installing DALI devices such as DALI Sensors and Dry Contact
Interfaces on the DALI bus.
DALI voltage range: 12-21 VDC, nominal 14-16 V. Maximum combined DALI Power Supply current rating (nominal
and short circuit): 250 mA per Universe or Galaxy (output).
Maximum bus length from any point to the DALI controller should not exceed 300 m (1000 ft), with max. 2.5 mm
(12 AWG) wires, to ensure signal integrity is not adversely impacted by cable inductance and capacitive loading
(providing they are not dedicated comms cables with controlled impedance).
Smaller gauge wires are allowed providing the resistance limit of 4 Ohms (end-to-end wire loop resistance) is not
exceeded.
Wire gauge
0.5 mm
2
(20 AWG)
0.75 mm
2
(18 AWG)
1.5 mm
2
(16 AWG)
To extend a DALI lighting zone beyond the standard-length limits, a DyNet network of multiple DALI
E
controllers is often used, enabling combined install lengths of > 800 m.
16
th
February 2022
DA +
DA -
Maximum cable distance
Up to 100 m (330 ft)
Up to 150 m (500 ft)
Up to 300 m (1000 ft)
Resea rch
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Installation Guide
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