1. Introduction
Daqu — Manual
1
Introduction
First of all, we would like to thank you for purchasing our product. Daqu is
data acquisition unit designed for monitoring engine parameters. Daqu reads
various engine sensors, processes the readings and transmits them to the CAN
bus, where other units can make use of these readings.
We strongly recommend to carefully read this manual before connecting Daqu
unit with engine sensors. The manual provides information about the installa-
tion of the Daqu unit and connecting it with sensors, probes and transducers.
This manual is dedicated to Daqu with hardware version 2.3. For earlier
hardware versions (mostly 2.1), please refer to previous manual.
1.1
General Description
Daqu is en electronics device, which is used to connect various engine sen-
sors, probes and transducers. It reads analogue or digital signals, converts
the signals into digital CAN messages and transmits the messages over CAN
network where other devices connected to the network access these messages.
Daqu electronics is enclosed in thin anodized aluminum case. Electronics is
designed to sustain elevated ambient temperatures and with some care it can
also be mounted in an engine compartment. A shield is required in this case
as electronics is not waterproof.
Only one cable connects Daqu and other devices on the CAN network. This
cable carries CAN messages and provides power for Daqu. Daqu uses mod-
ified CANaerospace protocol for the communication. A separate document
provides details about this protocol.
Daqu comes in two versions:
Standard, larger version is used for most engines: Rotax, Lycoming,
Continental, UL-Power, Simonini, Hirth, etc. Here, engine sensors are
directly connected to four twelve pin connectors. It also has one five pin
CAN connector and
φ
5 mm outer diameter intake manifold pressure
connector.
Mini version a.k.a.
Mini Daqu
is used for some modern engines equipped
with digital output from their ECU. Here, most engine sensors are con-
nected to ECU and mini Daqu simply reads sensor values from ECU
digital output. Besides information from ECU, mini Daqu allows con-
necting additional sensors like rotor RPM, fuel level, trim position, etc.
©
Kanardia
2019
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