Avionics Innovations DMP-200 (MP3 Player) Installation Manual - Manual (Page 8)

DMP-200 INSTALLATION MANUAL PAGE 8 OF 18
P/N DMP8012-00 REV E
Example: Active Low
The annunciator lamp
functions as a pull-up
resistor. If a lamp is not
used, it must be replaced
by a resistor (1/4 W, 10K
to 47K Ohms)
Example: Active High
The annunciator lamp
functions as a pull-down
resistor. If a lamp is not
used, it must be replaced
by a resistor (1/4 W, 10K
to 47K Ohms).
3.3.2 Discrete Triggers
Three discrete trigger inputs are provided, each of which can be assigned to a particular
audio track via the CardPrep software. When a trigger input becomes active, the
corresponding audio track is played. Each input can be configured independently in Setup
Mode as active high or active low.
If more than one trigger input becomes active at the exact same time, the higher number
input has priority. For example, if Trigger 3 and Trigger 1 become active simultaneously,
the track assigned to Trigger 3 is played and Trigger 1 is ignored.
The trigger inputs are floating, and must be pulled up or down externally depending on the
desired active state. Inputs may vary between 0V and 35 VDC: levels above 3.5 VDC will
be interpreted as “high”, while levels below 3.5 VDC will be “low”.