THORLABS DC4104, Operation Manual

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DC4104
4.3.4 External Control Mode
The 'External Control Mode' can be selected by pressing the 'External Control Mode' tab.
In this mode, the LEDs can be controlled only via the 4 channel Push-Pull connector at the rear
panel of the DC4104. The applied voltage corresponds to the LED current. 1V is equivalent to a
LED current of 100mA. A maximum voltage of 10V can be applied, which will result in a current
of 1A. All LED channels will be addressed by their individual control voltage provided they are
enabled by clicking on the LED figure below the corresponding channel indicator, similar to the
hardware
External Control Mode .
The button in the left lower corner is used to change between the output modes 'Single Selec-
tion' and 'Multi Selection'. Within the 'Single Selection Mode' only one LED can be enabled
while within the 'Multi Selection Mode' up to four LEDs can be used.
4.3.5 User Limit Current
For each LED, and individual current limit can be set. Some of the Thorlabs LED heads feature
an EEPROM, with the LED maximum current limit stored. The user current limit can be set be-
low or equal to this maximum current limit.
Select 'Configuration -> User Limit Current...' from the menu.
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