The controller is an all-in-one device, that combines PC type computer with operating system and dedicated software, and microcontroller system to control dyno and acquire data in real time.
Tasks performed by the controller:
- Readout of dyno parameters and data logging signals from additional sensors and OBD
- Generation of absorbers control signal
- Control of auxiliary dyno devices such as fans etc.
- Saving of all the data and later analysis
- Option to extend controller capabilities with CAN-Bus connected devices.
General specification
| Power supply | 100-240 VAC, 50-60Hz, 1.5A, IEC C14 socket |
| Ambient temperature | −20°C – 50°C |
| Ambient humidity | 0%-95% non condensing |
| Base computer | 4-core Cortex A72 1,5GHz 4/8GB RAM LPDDR4 Data memory 32/64GB 100MB/s |
| Microcontroller | 32-bit RISC 64MHz |
| Dimensions | 25cm x 12cm x 4.5cm |
| Mass | 607g |
Inputs / outputs
- Wi-Fi IEEE 802.11b/g/n/ac (2,4/5 GHz)
- Bluetooth 5.0 (Low Energy (BLE))
- Gigabit Ethernet
- 2 x USB 2.0
- 2 x USB 3.0
- 2 x micro HDMI
- Audio mini jack
- Ambient conditions sensor (temperature, pressure, humidity)
- CAN-BUS 2.0B
- Power outputs 24V, 12V, 5V
- Analog outputs 0-10V
- Low side PWM outputs 3A 40V
- Additional ON/OFF low side outputs 3A 40V
- Two-terminal relay outputs 250V 16A
- Hall sensor frequency inputs for axle speed
- Engine speed input for hall, VR, inductive or capacitive clamp sensors up to 15kHz
- Load cell analog inputs 0-5V (for amplified signal)
- Fast, general purpose analog inputs 0-5V
- High-precision analog inputs 0-5V for thermocouples or other analog signals
- 2-pin switch inputs
PC typical interfaces
The controller is equipped with typical interfaces, found in PC type computers, such as USB, Ethernet, micro HDMI. These allow to connect standard input / output devices such as mouse, keyboard, printer, display and internet connection. Wireless interfaces such as Wi-Fi and Bluetooth are also available.
Bluetooth enables wireless connection with vehicle OBD system, for readout of engine parameters, with use of optional interface.
Ambient sensor and power correction
Built in precise Bosch ambient sensor is used to measure temperature, pressure and humidity which can be used to calculate corrected engine power correction. Available correction standards are:
- DIN 70020
- EC 95-1
- ISO 1585
- JIS D1001
- SAE J1349
Sensor specification:
- Humidity: 0% ÷ 100% ±3%
- Pressure: 300 ÷ 1100hPa ±1.7hPa
- Temperature: -40 ÷ 85°C ±1.25°C
All power correction parameters can be sourced from external sensors. If the controller is installed in a control cabinet with elevated temperature, the temperature for power correction can be sourced from:
- external sensor connected to analog input
- OBD
- CAN bus
CAN-Bus interface
The controller is equipped with CAN-Bus 2.0B interfaces, with transmission speed up to 1Mbps, compatible with ISO-11898-2 and ISO-11898-5.
Interfaces are equipped with software controlled 120Ohm terminating resistor.
CAN-Bus is routed with one twisted pair of wires and allows connecting many devices in parallel on one bus.
Example devices that can connected to the controller via CAN-Bus:
- Additional actuator drivers, H-bridges for servo motor control
- Additional input extenders – wideband oxygen sensor controller
- Automotive displays such as Ecumaster ADU
- Engine control units such as Ecumaster EMU Black, which can be used to read engine operation parameters or to control throttle opening
Power supply outputs
- 3 separate power supply outputs: 24V, 12V, 5V (2A), capable of total 20W power
Low power external modules can be connected to the supply.
The supply can be used to power external relays and control them with low side outputs.
Analog outputs
- Analog outputs with 0-10V range are intended to control auxiliary dyno devices requiring analog signal.
- Can be used to control dyno absorber in retrofit applications.
- Output impedance: 1kOhm
- Resolution: 12bit
Low side and relay outputs
The controller is equipped with low side outputs, capable of connecting terminal to ground.
- Maximum switched voltage: 40V
- Maximum current: 3A continuous, 12A peak
- Maximum inductive load switching energy: 50mJ
- Built in 10kOhm pull-up resistor to +12V for digital signal generation
- Short circuit and overload protected
Part of the outputs have hardware PWM generation functionality and can generate PWM signal with frequency from 0.06Hz to 50kHz and resolution of 20bit. PWM outputs are capable of controlling:
- eddy current brakes (with use of external BD1 brake power supply)
- solenoid valves
- servo motors compatible with RC pulse signal
- power modulation of devices such as cooling fans etc.
Remaining low side outputs and relay outputs are controlled with programmable logic and allow to power auxiliary devices according to operating conditions or user input. Example use cases are:
- automatic fan turn on above preset engine speed
- starter motor control from dyno keyboard
Relay output capacity is 250V 16A for resistive load. Switching high inductive load may require an external arc suppression circuit.
Frequency inputs
Shaft speed signal inputs specification
- Maximum input signal voltage: 15V
- Signal threshold voltage: 2.5V
- Hysteresis: 0.6 – 1.2V
- Pulse capture mode frequency range: 15mHz – 15kHz
- Pulse capture mode resolution: 31.25ns
- Pulse capture mode accuracy: 0.003%
- Pulse capture mode precision @ 1kHz: 0.0032%
- Pulse capture mode precision @ 15kHz: 0.045%
- Pulse count mode frequency range: 10kHz – 10Mhz
- Pulse count mode sampling frequency: 1000Hz
- Pulse count mode accuracy: 0.003%
- Pulse count mode precision = Sampling frequency / Input frequency
- Pulse count mode precision @1MHz: 0.1%
The engine input allows reading signal from Hall, VR, inductive or capacitive clamp sensors. It can be used to read engine speed in cases where the speed is not in constant relation with dyno roller or shaft speed.
- Input voltage up to 50VAC sine, 250V peak
- Differential input
- Adaptive signal arming threshold
- Pulse capture mode frequency range: 15mHz – 15kHz
- Pulse capture mode resolution: 31.25ns
Analog inputs
The device has analog inputs with 0-5V range. Some of those inputs are reserved for amplified load cell signal. Other inputs can be used to connect any additional sensor.
- Maximum input voltage: 30V
- Measurement range: 0-5V
- Hardware ADC resolution: 11bit (2.5mV)
- Resolution with oversampling: 14bit (1mV)
- Sampling frequency: 500Hz
- Measurement accuracy: 1% @ 0°C ÷ 40°C
- Measurement precision: 0.3% @ 0°C ÷ 40°C
High-precision analog inputs
The device has differential pairs of high precision analog inputs. These inputs can be used for direct thermocouple connection or for connection of any sensor giving signal in 0-5V range. Every pair allows measuring one signal in differential or two signals single-ended mode.
- Maximum differential signals: 4
- Maximum single ended signals: 8
- Resolution: 16bit (3.9μV – 94μV)
- Sampling frequency: 10Hz
- Voltage ranges: 0-256mV to 0-5V
- Measurement accuracy: 0.16% @ 0°C ÷ 40°C
- Measurement precision: 0.1% @ 0°C ÷ 40°C
Switch inputs
The device has inputs for switch connection. A switch can be used to activate software functions or controller outputs.