Kanardia Boxi II, Manual

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Boxi II – Manual 2.3 Analog Input
2.3 Analog Input
Analog input consist of two analog inputs and a reference voltage input/output.
It is able to measure voltage from various sensors used for detecting trim and/or
flap position.
Boxi outputs a weak reference voltage to be used with simple resistor divider
sensors (potentiometer). However in the case of voltage divider powered by
external source the reference voltage could be overridden by external reference
voltage. The sensor voltage can therefore depend on internal reference, external
reference or absolute voltage between
V
ref
−
and V
in
inputs.
Input specifications are listed in table 2
Description Value
Min voltage on any input -3 V
Max voltage on any input 18 V
Reference output 3 V
Reference output resistance 2 kOhm
Input resistance min. 100 kOhm
Table 2: Input characteristics.
2.4 Output Stage
Output stage consists of two pairs of output modules: Ptt and Motor.
2.4.1 Ptt1 and Ptt2
Ptt (Radio) outputs are mostly used to control radio transceiver push-to-talk
input. Output is realized using electrically isolated solid-state relay. Its output
terminals are routed directly to output terminals 1/2 and 3/4 respectively.
Default output state is open (NO, normally open). Press on the PTT button
shorts terminals 1, 2 or 3, 4 respectively.
2
Table 3 shows basic characteristics
of solid-state relay used.
Beside standard configuration this outputs could be used for any other digital
output function.
2
Default configuration.
8
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