Pulse Frequency Sensors Connection - NAVTELECOM SMART S-2422 Operation Manual

Profiles "Discrete NC+" and "Discrete NO+" allow to work with sensors, which, when turned on or off, close the input
to "+" supply voltage.
+U
+U
Note:
It is recommended to connect one of the universal input (usually UIN1) to the vehicle ignition line and make the
appropriate setting in the configuration. However, such connection is not mandatory.
In addition to the source of notifications about turning on and turning off events, the input is used in coordinate
processing algorithms (for example, when they are averaged at parking lots), energy saving, when calculating engine hours
and in some other device algorithms.
Any input which configured for operation with a discrete sensor can be used as an ignition.
Alarm
button
Digital inputs are configured in the "Input lines" tab of the NTC Configurator program.
Сonnecting frequency or pulse sensors, it is necessary to consider how the output signal is generated in these
sensors. Further setting of the input depends on this.
It is necessary to set the threshold level of fixation correctly, in order the device correctly determine the frequency
Figure 22. Connection of normally open (NO+) sensors
Figure 23. Connection of normally closed (NC+) sensors
14 13 12 11 10 9
7 6 5 4 3 2
UIN1
«GND»
Figure 24. Connection of the ignition lock and alarm button

2.4.3 Pulse frequency sensors connection

R
1
C
1
R
1
C
1
8
1
+U
Ignition
switch
CPU_adc
R
2
CPU_adc
R
2
Fuse
(1А)
«-» «+»
Car battery
«GND»