DALI COMMUNICATION BUS TOPOLOGY
Note!
The allowed bus topologies are tree, star and line (Fig. 2). The bus looping is prohibited (Fig. 3).
ELECTRICAL CONDITIONS FOR COMMUNICATION BUS
Note!
The maximum length of DALI 1,5 mm
2
cross section leads is 300 m. if that distance is exceeded or if
the leads of incorrect cross section are used, the system may not work correctly and a repeater should
be used.
Note!
Correct voltage range for DALI bus
•
9.5 V
– 22.5 V, typical: 16 V
Maximum current in DALI bus:
•
180 mA for VERTEX control units
Maximum communication bus length depending on the conductor cross section
Length
Minimum conductor cross section
up to 100 m
0.5 mm
2
100-150 m
0.75 mm
2
150-300 m
1.5 mm
2
Allowed bus topologies
Prohibited bus topologies
16
