3.1
Connection Wires
miniDaqu — Manual
Table 3:
Daqu ECU connector pinout.
Pin
Description
1
GND - ground
2
RS232 RX
3
RS232 TX
4
CAN B high
5
Relay out - (or Alarm -)
6
CAN A low
7
CAN A high
8
CAN B low
9
Relay out + (or Alarm +)
3.1
Connection Wires
Tefzel (or similar grade insulation) is recommended for all wires. The signal
wires thickness shall be AWG 22 unless other thickness is recommended.
3.2
Daqu Ground Pin (GND)
NEVER connect any Daqu ground pin (GND) directly to the aircraft or engine
block or to common system ground. Routing ground through aircraft/engine
block will not damage Daqu, but will create unnecessary ground loops, which
in turn may cause incorrect readings from the engine sensors, especially resis-
tive ones.
Daqu ground pin should be used only when:
1. An active sensor is installed and GND pin is used together with some
power +5/+12 V pin to power the sensor and sensor signal is connected
to E, F or Y channels.
2. Isolated resistive (two wire) sensor is installed and GND pin is used as
a reference ground for the sensor. In this case sensor is connected to an
E channel.
3.3
Resistive Sensors
E and F channels are designed to apply a large enough measuring current,
and consequently also a large enough voltage difference in order to measure
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Kanardia
2019-2022
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