4.3
Output Modes
There are four trigger inputs. The sense of these signals can be active high or active low, as set
by the “P” flag.
The trigger inputs are used as follows:
Mode
Trigger Input
Output
Continuous
Don’t care
Output is on.
Switched
Trigger = 0V
Output is off
Trigger = 4.5V to 24V
Output is on
Pulsed
Trigger goes from 0V to 4.5V
Pulse is
triggered
Trigger goes from 4.5V to 0V
No action
4.3.1
Continuous Output and Switched Output
In continuous mode the output current is fixed and continuous. Switched mode uses a trigger
input to switch the output on or off.
In continuous and switched modes, the output current can be varied from 0% to 100% of full
brightness.
4.3.2
Pulsed Output
The output is off by default. When a trigger is the PP420 will wait for a delay and then pulse the
output. The delay, pulse width and pulse intensity are all configurable.
If the “P” flag is set triggers occur on the leading edge of the input, that is on the transition from
0V to (for example) 5V.
In pulsed mode, the brightness can be set up to 999% of its rating, but only for short periods and
at low duty cycles, so that the lighting does not overheat and get damaged. The default limits are
as follows. Other limits are available.
Output Brightness
Allowed Pulse
Width
PP420, PP420
Allowed Pulse
Width
PP420F, PP420F
Allowed Duty Cycle
0 to 100%
999ms
10ms
100%
101% to 200%
30ms
1ms
30%
201% to 300%
10ms
1ms
20%