3.7
Potentiometers
Daqu — Manual
V
E
1
2
E
2
1
Y
Y
Z
ROTOR
FFLOW
GND
+5 V
1
2
B
1
B
2
I
1
I
2
3
7
6
5
4
8
GND
+12 V
10
9
12
11
1
+
-
RPM
FL
1
FL
Signal 0-5V
2
Figure 9:
An example of active sensor with voltage output.
Sensors may have two or three wires. +5/+12 V
input
is connected to ap-
pro5/+12 V Daqu pin. Signal is connected to one of the D channels,
see Figure 10. The third wire is connected to the GND Daqu pin. Some sen-
sors do not require GND connection and they are grounded via engine block
instead. Rotax oil pressure sensor is one such example.
A
4 - 20 mA
C
A
A
4
14
GND
+12 V
3
2
1
D
D
15
+5 V
GND
1
2
FUEL
P
P
OIL
8
7
6
5
10
9
BAT
1
11
12
+
-
V
OIL
+
-
T
WATER
+
-
T
Figure 10:
An example of active sensor with current output. Symbol A stands
for
Ampere
which is synonym for electrical current. For some sen-
sors, connection with GND is not required.
3.7
Potentiometers
Some resistive sensors are in fact potentiometers (fuel level, trim, etc.). They
can be connected as variable resistors or as variable voltage dividers.
©
Kanardia
2019
20
