RTxxx LEDlighting controllers - User Manual
7.1.1 Continuous output, switched output, selected output
Mode Trigger input Output
Continuous Unused Output is on
Switched Trigger = off
Trigger = on
Output is off
Output is on
Selected Trigger = off
Trigger = on
Output is continuous brightness 2
Output is continuous brightness 1
Pulsed Trigger rising edge
Trigger falling edge
Pulse is triggered if P flag = 1
Pulse is triggered if P flag = 0
In continuous mode the output current is fixed and continuous. Switched
mode uses a trigger input to switch the output on or off.
Selected mode uses a trigger input to select between the two different
brightness settings. Brightness 1 must be greater than brightness 2. The P
flag can be used to invert the trigger input.
The output current can be varied from 0% to 100% of full brightness.
7.2 Pulsed output
The output is off by default. When the RTxx is triggered, it waits for a delay
and then pulses the output. The delay, pulse width, retrigger delay and
pulse intensity are all configurable.
Retrigger delay is the minimum allowed time from one trigger to the next.
Any triggers that happen too soon after the previous trigger are ignored.
The retrigger delay is set in multiples of 100μs.
When connected to a light, the brightness can be set up to1000% of its
rating, but only for short periods and at low duty cycles, so that the lighting
does not overheat and get damaged. The table below shows the operating
limits:
Output brightness
Maximum
pulse width
Maximum
duty cycle
0 to 100% 999ms 100%
101% to 200% 30ms 30%
201% to 300% 10ms 20%
301% to 500% 2ms 10%
501% to 1000% 1ms 5%
The duty cycle is limited by ignoring triggers which are too soon after the
previous trigger.
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