OSRAM OPTOTRONIC Constant current LED power supplies with 3DIM - Manual (Page 12)

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WIRING AND CONFIGURATION OF THE ECG
4.2. StepDIM – midnight step-down/
half-night switch
4.2.1. Wiring
For StepDIM operation, the ECG is connected to the
mains. The DALI
® terminals are left unconnected. The
dedicated SD terminal is connected to a control line or
a switched phase.
Note: SD connection has to be considered at the interface
between luminaire head and pole.
Dimming is activated by a control switch. The SD control
states HIGH and LOW are defi ned as shown in table 3.
If in the “StepDIM/DALI” mode the switch is closed and
phase voltage is applied to the SD terminal, the state
HIGH is set and the dim level is reached by the ECG.
Leaving the SD terminal fl oating (i.e. no voltage is applied),
the state LOW is set and dimming is not activated.
For “StepDIM invers/DALI”, the behavior is inverted.
The “StepDIM inverse/DALI” mode, which is the most
commonly used one, can be selected via the 3DIM Tool.
Notes:
• The control line or the switched phase to activate the
StepDIM should only be connected to the SD port of the
3DIM ECGs. In all other cases, it is recommended to use
a relay in between (fi gure 18b).
• The ECG can be used for StepDIM operation in common
installations with a control line length of up to 1.5 km and
a pole distance of up to 150 m.
Figure 16: Wiring for StepDIM operation – OPTOTRONIC ® 3DIM ECG.
Figure 17: Wiring for StepDIM operation – POWERTRONIC ® 3DIM ECG.
OPTOTRONIC ® 3DIM ECG
POWERTRONIC ® 3DIM ECG
Table 3: Defi nition of SD control states
SD control
state Physical con-
trol signal at
SD terminal SD control
switch status Output
“StepDIM/
DALI” Output
“StepDIM
invers/DALI”
HIGH
L potential
to SD
CLOSED Dimming No dimming
LOW
SD terminal
fl oating
OPEN No dimming Dimming
LED module
HID lamp
LED out
HID out
SD control
switch
SD control
switch
Mains
50/60 Hz
Mains
50/60 Hz
L
L
N
N
SD
SD
DA
DA
DA
DA
OT ECG
PTo ECG
Lamp