Attention!
Due to the technological specifications of the device, the UIN1 is designed without taking into account the built-in
pull-up. Accordingly, the "Discrete NR-", "Discrete NZ-" profiles will not be available for the UIN1. Therefore, connecting
sensors operating by "ground", their connection diagram to the device via the UIN1 will differ from the diagram used to
connect to the UIN2 and UIN3.
CPU_adc
R
1
R
2
UIN
C
1
R
pu
CPU_pull-up
VDD
Figure 28. Connection of flow meter with a reed sensor to UIN2, UIN3
CPU_adc
R
1
R
2
UIN
C
1
2–10
кОм
+U
Figure 29. Connection of flow meter with a reed sensor to UIN1
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. For proper
operation of these functions, the accelerometer must be calibrated after installing the device on the vehicle.
2.6 Control outputs connection
OUT1 and OUT2 open collector outputs are designed to control low-current loads up to 500 mA. When the output is
activated (turned on), it connects the external load to the "-" power supply (to the "ground").
The character of the controlling signal depending on the chosen mode can be permanent, signal or periodic.
Summary of Contents for SMART S-2423
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