Power Supply
110/230V Inp.,
110/230V~
ChromoFlex-Module "I350"
LED1
LED2
LED3
R -
G -
B -
Power
Power Supply - (GND)
RS232-RX
RS232-GND
to PC
ca. 10-12V/1.2A
+
-
~
~ 10-12V/1.5A Outp.
The example above uses 3 LEDs. A 4 wire cable is used, where 1 wire is a simple pass-through for
the .
hromoflex modules will not emit high frequency signals, even for longer lines. Hence even cable
lengths of 10 Mtr. are no problem at all, if the above calculations are considered (like in contrast to
many electronic transformer for halogen lamps).
Hint: Copper has a resistance around 0.02 Ohms per Mtr. for a 1mm² conductor.
Important: If the selected supply voltage is much to low, the LEDs might not operate with maximum
brightness or some flickering can be noticed. If the supply voltage is to high, unnecessary heat must
be dissipated. Complete sets supplied by us, are already matched. If using other switching supplies,
often there is a small potentiometer on the supply, where the output voltage can be adjusted within
several percent.
We recommend to select the lowest voltage, where all the LEDs work at full brightness without
disturbance.
Each „I350“ module will draw 1.2 Ampere as maximum from the supply (all channel full on).
Important note: The optimal operating voltage of the „I350“ module is 12 Volts and using 3 industrial
standard 3*1 Watt RGB-LEDs, serial connection. For the design the following assumptions have
beend made:
At least 2 channels drive LEDs with higher forward voltage (green, blue)
The total continuous power dissipation in the module is <= 2.5 Watt, the module is not designed
to run continuously at full load (even mixed „white“ normally requires only 66% full load).
Good air ventilation is needed, environment air temperature should be <= 30°C
If these limits are exceeded for longer periods (especially if using more than 3 LEDs in serial
connection), we recommend to reduce the dissipated heat in the module, by using external power
resistor to catch a good deal of the possible heat:
Chromoflex - Manual - English V1.07
- www.barthelme.de
Rev. 02.07.2006
- 4 -
