RTxxx LED lighting controllers - User Manual
7
General description
The RTxxx series of current controllers provide repeatable intensity
control of LED lighting for machine vision applications. This includes
the intensity control, timing and triggering functions required for
machine vision systems.
LED lighting needs a constant current supply as small variations in
voltage can cause large variations in light output. The RTxxx series of
controllers can set currents in steps of 0.1% (with a lower limit of
2.5mA steps) to give very fine control of intensity.
Several modes of operation are separately available for each channel:
Continuous
In continuous mode the output is a continuous brightness.
Pulse (Strobe)
In pulse mode output is pulsed once per trigger. One trigger input is
used as a trigger. The delay from trigger to pulse, the pulse duration
and the brightness can be set.
Switched
In switched mode a trigger input is used to switch the output current
on and off. The output is only enabled when the trigger input has a
voltage
on it.
Selected
In selected mode a trigger input is used to select between two
different intensities.
With the exception of the RT200, controllers in the RTxx series are set
up using an Ethernet port or serial port. The set up is non-volatile, so
the RTxxx resumes the same operation after a power cycle.
7.1
Output modes
The trigger inputs are used as described overleaf:
Note:
The P flag inverts the sense of the trigger input, see
7.1.1
Continuous output, switched output, selected output
Mode
Trigger input
Output
Continuous
Unused
Output is on
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