OSRAM QUICKTRONIC INTELLIGENT DIM CFL - Manual (Page 23)

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2.6 DALI data transfer
With DALI, data telegrams are produced by short-circuiting and re-
leasing the line in order to generate the corresponding "low" or "high"
logic states. This may be caused by either the ECG or by the control-
ler. In the event of a short-circuit the current is limited by the interface
supply to 250 mA. In the idle state (no data transfer) approx. 16 V
DC
is
on the ECG. The following figures illustrate data transfer via DALI:
Undefined
Undefined
"Low Level"
receiver range
22.5 V max.
9.5 V min.
20.5 V max.
11.5 V min.
16 V typ.
0 V typ.
Receiver unit Sender unit
6.5 V max.
-6.5 V min.
4.5 V max.
-4.5 V min.
8 V typ.
Undefined
“High Level"
sender range
“Low Level"
sender range
“High Level"
receiver range
Figure 11: Voltage level on the DALI interface