miniDaqu
Engine Management System
Manual
©
Kanardia d.o.o.
June 2022
Revision 1.4
Page 1: ...miniDaqu Engine Management System Manual Kanardia d o o June 2022 Revision 1 4...
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Page 3: ...creativecommons org licenses by sa 3 0 In short the license gives you right to copy reproduce and modify this document if you cite Kanardia d o o as the author of the original work you distribute the...
Page 4: ...t Disposal of Waste Electrical and Electronic Equipment This electrical item cannot be disposed of in normal waste Check with your local authority for kerbside collection or recycle them at a recyclin...
Page 5: ...history of this document Rev Date Description 1 0 January 2019 Initial release 1 1 March 2019 Unified DB9 markings 1 2 July 2020 Digital PNP sensor schema fix 1 3 June 2021 Clarify description of outp...
Page 6: ...miniDaqu Manual Kanardia 2019 2022 4...
Page 7: ...Connectors and Cables 13 2 2 1 Kanardia CAN Bus Connector 13 2 2 2 ECU Connector 15 3 Wiring in General 15 3 1 Connection Wires 16 3 2 Daqu Ground Pin GND 16 3 3 Resistive Sensors 16 3 4 Thermocouple...
Page 8: ...S 25 6 1 ECU CAN Bus Connection 25 6 2 Configuration 25 6 3 Automatic Start Power Switch 25 6 3 1 Installation 26 6 3 2 Configuration 27 6 3 3 Operation 28 7 ULPower Engines 28 7 1 ECU and AUX Paramet...
Page 9: ...on 38 9 3 2 Configuration 39 9 4 Current 39 9 4 1 Installation 40 9 4 2 Configuration 40 9 5 Fuel Level 40 9 5 1 General Principles 41 9 5 2 Installation 42 9 5 3 Resistive Fuel Level Sensors 42 9 5 4...
Page 10: ...and 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 ne...
Page 11: ...protocol 1 2 Technical Specifications Table 1 lists technical specifications and figures 1 and 2 shows principal di mensions of Daqu Description Value Weight without cables 90 g Size 76 x 44 x 30 mm O...
Page 12: ...imensions and connection clearence of mini Daqu Front View 1 3 Power Supply Daqu gets its power supply via CAN bus cable which is typicall connected to some display like Nesis Aetos Emsis Digi This me...
Page 13: ...g channel with 0 to 30 V input used to read higher voltage levels Only one such channel is available and is used to measure the system voltage Note this is NOT power source for Daqu Daqu is just measu...
Page 14: ...No not connect any power source to these pins Daqu is powered via CAN bus cable and does not require external power connection over the pins 12 V output pin shall be only used to provide power for so...
Page 15: ...posed to fluids or moisture Do not put Daqu under coolant expansion bottle Please consider that flying trough rain delivers vast amount of water into engine compartment If Daqu is in engine compartmen...
Page 16: ...RPM out Figure 3 Details of the mini Daqu connectors The left is used for Kanardia CAN bus and the right connects to an engine ECU D SUB 9 connector is needed The pinout of the connector is given in...
Page 17: ...ded On the other side of the cable are free ends The pinout of the connector is given in table 3 This connector also host two pins which can drive an external relay This can be used for automatic star...
Page 18: ...gh 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 sho...
Page 19: ...ard Daqu must be used 3 5 Analog Active Sensors Active sensors require external power to operate and provide some active signal Some sensors require 12 V and some 5 V to operate These sensors are ofte...
Page 20: ...5 V on maximal load 0 25 4 75 V output range Sensor outputs 0 25 V when not loaded and 4 75 V on maximal load Figure 6 illustrates an example of active sensor with voltage output connected to an E ch...
Page 21: ...GND is not required 3 6 Potentiometers Some resistive sensors are in fact potentiometers fuel level trim etc They can be connected as variable resistors or as variable voltage dividers 3 6 1 Variable...
Page 22: ...ve sensors require external power to operate They produce a step like signal which can be viewed at as pulses Daqu measures time between these pulses Such sensors are used for measuring rotor RPM and...
Page 23: ...llustrates a typical connection for the PNP case Here an addi tional 2 2 k resistor is needed between GND and signal Do not use higher resistance because internal pull up resistor must be overriden 4...
Page 24: ...ements are higher the indirect solution must be used Figure 12 illustrates a direct connection to the alarm pins 4 2 Indirect Connection In the cases where load exceeds 150 mA an indirect load connect...
Page 25: ...1 2 1 BAT V GND 3 5 V 4 AUX 5 6 F1 F 2 FUEL P E2 7 FL 2 GND 8 E1 9 FL 1 Y1 10 ROTOR GND 12 V 11 12 Relay NC NO NC NO DB9 ECU DB9 KANARDIA Open wires Engine ECU DB9 Wire Colour Function 6 Black CAN A L...
Page 26: ...tal pulses on the pins 5 and 9 of the Kanardia CAN bus connector See Figure 3 and Table 2 It creates one digital pulse per RPM Third party instrument can connect to these pins and detect pulses in ord...
Page 27: ...ation Manual documentaiton for more details Both lanes are connected to the Daqu Engine ECU connector see section 2 2 Lane A comes from Rotax HIC A connector and Lane B comes from Rotax HIC B connecto...
Page 28: ...e of the switch is to provide startup power for engine ECU Once engine runs the switch must be turned off as engine provides its own power for ECU This means that two additional operations are require...
Page 29: ...first pole and power second pole The signal lines must be protected with a flyback diode unless such diode is already built in the relay Use a diode which reverse voltage VR is rated higher than the s...
Page 30: ...he relay on engine stop Avionics must be turned off and then back on in order to activate automatic start relay again If Daqu fails to engage relay due to some malfunction and you can t start the engi...
Page 31: ...ock view of ECU connection over RS 232 protocol Figure 20 illustrates an example with one ECU connected to Daqu using CAN bus The AUX box is optional AUXBOX MAP ECU A Baro pressure 120R 120R CAN TPS M...
Page 32: ...rameters provided by ECU and AUX box with exemp tion of auxilary values Please note that some additional sensors can be connected to Daqu too 7 2 ECU CAN Bus Connection Please note that GND is not con...
Page 33: ...h ECU1 CAN High Pin 8 CAN B Low ECU2 CAN Low Pin 4 CAN B High ECU2 CAN High Pin 1 GND N C 7 3 ECU RS 232 Connection The serial port interface can be connected to only one ECU Daqu receives data stream...
Page 34: ...ons ULPower RS 232 when ECU is connected using RS 232 serial connection ULPower CAN 125 kb s when ECU is connected using CAN The communi cation speed is 125 kb s This speed was used ECUs delivered unt...
Page 35: ...UX 5 6 F1 F 2 FUEL P E2 7 FL 2 GND 8 E1 9 FL 1 Y1 10 ROTOR GND 12 V 11 12 DB9 ECU DB9 KANARDIA Open wires Engine ECU DB9 Pin Wire Colour Function Function 6 1 Black GND CC m DB 9 male CAN A LOW 8 5 Bl...
Page 36: ...embrane and on the other side is atmospheric or better said surround ing pressure hence term vented This surrounding pressure serves as reference This is what you usually need to measure oil or fuel p...
Page 37: ...s enter bar value during channel configuration 9 1 4 Variable Voltage Sensors with variable voltage output were described in section 3 5 1 Connec tion example is given on Figure 6 It shows an active s...
Page 38: ...Function Fuel pressure Sensor 4 20 mA Int Res Report time 0 5 1 0 s Filter 2 0 s Max value at 20 mA 10 depends on sensor Table 9 Typical fuel pressure configuration for sensors with current output Max...
Page 39: ...10 Rotax iS engine with vented gage fuel pressure sensor Option Selection Setting Channel Any E or F Function Fuel P cmp Sensor Active 0 5 4 5 V Report time 0 5 1 0 s Filter 2 0 s Max value at 4 5 V...
Page 40: ...then calculated as F S M 9 3 Voltage Daqu can measure voltages from 0 to 30 V DC on the channel C The system voltage is usually measured on this channel Some engines Rotax iS for example transmit the...
Page 41: ...system bus source 9 3 2 Configuration The table 12 shows correct channel settings Option Selection Setting Channel C only Function Voltage Sensor Voltage Report time 0 5 1 0 s Filter 1 0 s Table 12 C...
Page 42: ...rovides sensor ground and connects to GND pin White wire provides signal and connects to one of E or F channels See Figure 26 for proper connection schema C 1 2 1 BAT V GND 3 5 V 4 AUX 5 6 F1 F 2 FUEL...
Page 43: ...t must be also calibrated to indicate fuel level in the tank properly The tank calibration procedure is not part of this secion Please also note that some sensors capacitive ones usually require senso...
Page 44: ...rks near or inside the fuel tank When removing fuel level sensor make sure to disconnect other wires before the ground wire When re installing fuel level sensor connect the ground wire first 9 5 3 Res...
Page 45: ...Filter 2 5 s Table 14 Typical fuel level configuration In the case of capacitive sensors some special sensor specific calibration pro cedure is usually required consult the sensor manual for more det...
Page 46: ...l fuel level configuration for a capacitive sensor 9 5 5 Tank Shape Calibration After sensor was installed properly connected and calibrated when neces sary and appropriate channel was configured tank...
Page 47: ...ariable resistance The correspond ing channel is configured something like shown by Table 16 Option Selection Setting Channel Any E or F Function Pitch trim Sensor Res 400 Ohm 5 kOhm 10 kOhm Report ti...
Page 48: ...given in section 3 7 Two schematics were given one for NPN sensor Figure 10 and the other for PNP sensor Figure 11 Let s assume that sensors is applied to a rotor and it is counting teeths in the roto...
Page 49: ...shaft directly from engine drive with two pulses per shaft revolution The shaft turns rotor via reductor Reductor s ratio is 5 814 Your case will be different 9 8 Fuel Flow Fuel flow sensors are activ...
Page 50: ...general Sensor shall not be installed close to hot parts like exhaust system Some sensors use NPT fittings tapered Always respect maximal torque allowed when tightening the fitting Never use Teflon t...
Page 51: ...n during the design production storage and handling it may happen that the Product will be defective in some way Please read the following sections about the warranty and the limited opera tion to get...
Page 52: ...ty of any kind Software distributed by Kanardia with or without the Kanardia s brand name including but not limited to system software is not covered under this Lim ited Warranty Refer to the licensin...
Page 53: ...s of profits on contracts loss of the use of money loss of an ticipated savings loss of business loss of opportunity loss of goodwill loss of reputation loss of damage to or corruption of data or any...
