4.6
Oil Pressure
Daqu — Manual
Try to use sensors, which can be disconnected close to the sensor head. This
reduces the problems with sensor installation – sensor is installed first and
then connected.
During installation, always respect the limiting torque and other details from
the engine installation or maintenance manual. Sensors with NPT threads
require application of special sealant.
4.6.2
Variable Current
Rotax engines use 10 bar variable current sensor by default. This is described
in section 3.6.2. Schematics is repeated here, adapted for typical Rotax instal-
lation, Figure 19. The sensor requires 12 V for power and it is grounded via
engine block, so GND lead is not connected. Signal output is currect between
4 and 20 mA.
Engine
block
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
Oil P.
Rotax
Figure 19:
Typical oil pressure sensor connection for Rotax engine. Active,
current variable sensor is used.
Corresponding configuration is shown in Table 8. D channels shall be used
with variable current sensor.
These channels have high precision internal
resistor, which is automatically activated when
4-20 mA Int Res
sensor is
selected. Because this sensor is a generic one, max value (or reference value)
must be also specified. This value is sensor specific. For the Rotax case it is
10 bar.
4.6.3
Variable Voltage
Sensors with variable voltage output were described in section 3.6.1. Connec-
tion example is given on Figure 20. It shows an active sensor with 0.5 – 4.5 V
©
Kanardia
2019
32
