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miniDaqu — Manual 4. Alarm Signal
Attention must be paid to apply correct voltage for the sensor. Figures show
connection to a 12 V, but some sensor may require 5 V.
3.7.1 NPN – Open Collector Output
Figure 10 illustrates a typical connection for the NPN case. Here all wires
are connected directly. Internaly the miniDaqu provides week pull up resistor
connected to internal 5V.
D
NPN
C
1
2
1
+
- BAT
V
GND 3
+5 V 4
AUX 5
6
F
1
F
2
FUEL
P
E
2
7 FL
2
GND 8
E
1
9 FL
1
Y
1
10 ROTOR
GND
+12 V 11
12
Figure 10: An example of NPN digital sensor connection.
3.7.2 PNP – Open Drain Output
Figure 11 illustrates a typical connection for the PNP case. Here, an addi-
tional 2.2 kΩ resistor is needed between GND and signal. Do not use higher
resistance because internal pull-up resistor must be overriden.
4 Alarm Signal
This section gives installation details for the alarm signal. The signal is is-
sued, when some main instrument (Nesis, Aetos, Emsis, Digi, etc.) detects
a warning and transmits the alarm request to Daqu. Daqu receives the re-
quest and it activates the alarm (relay) pins on the ECU connector. This can
be then used to trigger some action (e.g. illuminate a warning light on the
instrument panel).
Alarm signal option can not be used in parallel with Automatic start power
switch relay . The function of these pins must be specified in the configuration.
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