CPU_adc
R
1
R
2
UIN
C
1
Q2
R
p
R
pu
CPU_pull-up
VDD
+U
Figure 26. Connection of sensors with an “OC” type output circuit with a pull-up resistor in the sensor
When pulse flow meters with a reed sensor is connected, one contact of which is connected to the ground, it is
necessary to include an internal pull-up resistor in the device setup.
CPU_adc
R
1
R
2
UIN
C
1
R
pu
CPU_pull-up
VDD
Figure 27. Connection of flow meters with a reed sensor
2.5 Built-in accelerometer
There are virtual sensors based on the built-in accelerometer (three-axis acceleration sensor): soft and strong impact
sensors, displacement sensor and tilt sensor in the device. They can be used for alerts as well as external lines.
Accelerometer is also involved in the coordinate averaging algorithm during stops, and the correct display of the track
depends on its settings. In addition to virtual sensors, accelerometer is used for such functions as EcoDriving and crash
fixation. For proper operation of these functions, the accelerometer must be calibrated after installing the device on the
vehicle.
Summary of Contents for SMART S-2433
Page 11: ...Figure 14 Figure 15...
