MonoDAQ-U-X

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About the MonoDAQ-U-X

MonoDAQ-U-X is a fully isolated USB test & measurement device with full software support in DEWESoft data acquisition software. 8 multifunctional front pins can be configured as analog or digital inputs or outputs.

Key features

• Power and signal isolation between USB and front end
• Max. sample rate: 50 kS/s, resolution: 16 bit
• Can connect up to 2 full bridge strain gauges or up to 4 thermocouples
• Max. 4 differential or 8 single ended voltage inputs
• Current input with internal shunt (0.5 ohm)
• Analog output (+/- 4 V, 14 bit, 50 kS/s)
• Max. 8 digital inputs or outputs
• 1wire, I2C and UART interface on front connector
• Internal humidity sensor
• Internal IMU (3-axial accelerometer and 3-axial gyroscope)

Applications

• Embedded IoT system power consumption measurement
• Analog measurement front end for industrial machines and test benches
• Strain measurement in industrial quality control
• Industrial condition monitoring (voltage, temperature, current)
• Precision measurement front end for single-board computers (Raspberry Pi, LattePanda etc.)
• Precise laboratory power supply for board development

Software

For the download of the free software of MonoDAQ-U-X please click here.

Overall working principle

MonoDAQ-U-X is powered from the USB-C port on the backplane, therefore a single USB-C cable is needed for communication and power supply. Power and communication signals are isolated directly after the USB connector, which makes the microcontroller and the front end of the device fully galvanically isolated. Front end connector features 8 multifunctional pins that can be configured as analog inputs or outputs or as digital inputs or outputs. Front end is configured with the help of a channel setup table in DEWESoft software.
At the core of the measurement chain is a sigma-delta ADC with a maximum sample rate of 50 kS/s and a resolution of 16 bit. If only one input channel is used, the signal is alis-free with bandwidth of 0.4*fs (sampling frequency). If multiple analog input channels are used, the signals are multiplexed in front of the ADC. It is possible to select up to 8 single ended voltage inputs and up to 4 differential voltage inputs. Half of the channels can have a high input range of 10 V while the other half are limited to 2 V since there is no voltage divider on those channels.

 

Synchronization between devices

Multiple MonoDAQ-U-X devices can be connected to the same PC by using a multiport USB hub. Syncrhonization between devices is ensured if all of the devices are connected to the same hub. Multiple hubs can be connected to the top-level hub but refer to MonoDAQ support for compatible USB hubs on the market.

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