Profiles "Discrete NC+" and "Discrete NO+" allow to work with sensors, which, when turned on or off, close the input
to “+” supply voltage.
CPU_adc
R
1
R
2
UIN
C
1
+U
Figure 20. Connection of normally open (NO+) sensors
CPU_adc
R
1
R
2
UIN
C
1
+U
Figure 21. Connection of normally closed (NC+) sensors
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.
14
7
13
6
12
5
11
4
10
3
9
8
2
1
Fuse
(1А)
+U
Ignition
switch
UIN1
Alarm
button
«GND»
«GND»
«+»
«-»
Car battery
Figure 22. Connection of the ignition lock and alarm button
Digital inputs are configured in the “Input lines” tab of the NTC Configurator program.
2.4.3 Pulse frequency sensors connection
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
Summary of Contents for SMART S-2420
Page 11: ...Figure 11 Figure 12...
