Fuse
(1А)
+U
Ignition
switch
UIN1
Alarm
button
«GND»
«GND»
«+»
«-»
Car battery
4
2
3
1
14
7
13
6
12
5
11
4
10
3
9
8
2
1
6
5
4
3
2
1
Figure 32. Connection of the ignition lock and alarm button
Digital inputs are configured in the “Input lines” tab of the NTC Configurator program.
2.5.3 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 or calculate the pulses.
Connecting pulse or frequency sensors, the output of which is implemented according to the “open collector”
(OC) circuit with pull-up resistor, it is not necessary to turn on the Pull-UP circuit in the device by the setting.
CPU_adc
R
1
R
2
UIN
C
1
Q2
R
p
R
pu
CPU_pull-up
VDD
+U
Figure 33. 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.
Summary of Contents for SIGNAL S-2651
Page 16: ...Figure 19 Figure 20...
