OSRAM QUICKTRONIC INTELLIGENT DIM CFL - Manual (Page 44)

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The following figure illustrates control via a potentiometer:
On/Off
switch
N L – +
N
L
N
L
N
L
N
L
–
–
–
+
+
+ 4
3
2
1
4
3
2
1
4
3
2
1
DIMM-ECG
Lamp
Lamp
Lamp
DIMM-ECG
DIMM-ECG
Potentiometer
R =
100 k Ω log.
n
n: Number of connected ECGs
Figure 24: Potentiometer control of the 1…10 V interface
3.5.1 1…10 V: Staircase operating modes
As a basic principle, frequent switching is not ideal for fluores-
cent lamps and compact fluorescent lamps. Hence, bulbs are
still used in applications with extremely high switching frequen-
cy despite the high energy consumption. In staircase operation,
OSRAM DIM ECGs dim the light (1 % luminous flux) when it is not
required. This avoids unnecessary switching operations and saves
energy. Further benefits of the staircase circuit: Because the light is
not completely switched off, a certain amount of light still remains
available as an orientation light. When needed, the full light is im-
mediately present, without having to wait for a preheating period.
Typical applications of the standby circuit are all applications with high
operating cycles, such as staircase, hallway or underground car-
park, especially when the light is controlled with motion detectors or
timer switch.
3.5.1.1 Applications
a) Stairwell lighting timer switch
Here a special stairwell lighting timer switch (e.g. Siemens: Type 5TT1
303, see Siemens Catalog) provides the readiness switching of the
OSRAM DIM ECG. Functionality: The stairlight timer switch switches
on the OSRAM DIM ECG at the push of a button (100 % light). After
max. 10 min (time can be adjusted) the light is lowered to a prese-
lected level without intermediate stages. After a total of 30 min it is
switched off entirely. This 30-min cycle can be restarted at any time
by pressing a switch. Thus, the lamp-protecting mode is employed
in the evening hours when the staircase is used more frequently. The
light only switches between the dimmer settings, real switchings are
infrequent. At night, when the stairwell lighting is not required for pro-
longed periods, the remaining 13 % energy consumption are also still
stored at the lowest dimmer setting.