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2.4 Operation Modes
COBe LED drivers are intended for operation with LEDe modules. The utilization of
LEDe modules with COBe LED driver requires the prior connection of a cable (included
with COBe driver) between the COBe LED driver (7) and the LEDe module (8).
The controls feature a three way switch (3) to select the operation mode: continuous,
pulsed or off. A second control (1) is used to manually adjust the drive current in
continuous mode. A connector allows (4) to introduce a control signal in the PWM
mode.
•OFF mode
The switch (3) on the right of the frontal face of the LED driver has to be on the
middle position (‘OFF’).It is suggested to have the switch in this position when
connecting the power supply to the light source through (5).
•CW mode
To select the continuous mode, please move the switch (3) to the left position (‘ON’).
In this mode, the left knob (1) controls the LEDe module intensity. The intensity can be
adjusted between 20% (fully counter-clockwise) and 100% (fully clockwise) of
maximum intensity.
•PULSED mode
To work in pulsed mode, please move the switch (3) to the right position (pulsed
signal drawing). In this mode, the LEDe module intensity can be adjusted between 0%
and 100%of maximum intensity changing the duty cycle of the PWM signal introduced
through the PWM input connector (4) of SMA female type.
The PWM signal must vary between 0 and 5 V. Voltages out of this range can
damage the PWM input and disable the PWM mode. Voltages below 1.5 V will be
recognized as low level while tensions above 2.8 V will be considered high level. A
pulsed frequency of 500 Hz or lower is recommended to achieve the maximum
resolution. However, higher frequencies, up to 100 kHz, can also be used.
Whenever the LED driver is on, either in CW mode or in pulsed mode; the green LED
indicator (2) located on the front face of the light source will be on.In case of being in
pulsed mode, the LED indicator will blink in the same way as the light source.
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