Nesis III — Installation Manual
9.3
Autopilot Disengage
port. Figure 29 shows the connection schematic. If Nesis and device are both
connected to the same power source, the GND connection may be omitted.
1
5
6
9
GND
Aux - TX
Aux - RX
Device TX
Device RX
Device GND
Figure 29:
Connection schematics for auxiliary port 1.
9.3
Autopilot Disengage
When Nesis is connected to the autopilot system, an autopilot disengage but-
ton can be routed directly to the Nesis service port. Figure 30 shows the
connection schematic.
1
5
6
9
GND
AP disengage
Figure 30:
Autopilot disengage button schematics
In normal operation the circuit is open. When the button is pressed, it closes
the circuit and connects pin 1 with the ground. This is detected by Nesis,
which immediately sends the disconnect command to the servos.
9.4
Alarm Switch
The software does not support this function yet.
When some device (any CAN bus device) reports an error condition, like some
engine parameter outside limits or a sensor failure, an output signal will be
raised. This alarm line can be used to trigger some other device, an alarm
light on the instrument panel, for example.
Figure 31 illustrates schematics for small load connected to pin 8. When
alarm is on, optocoupler will internaly connect the line to ground (GND) and
close the circuit, so the load will be powered. The load must be externally
powered with the system bus voltage.
37
©
Kanardia
2018
