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Summary of Contents for ONTRAK ADU73
- Page 1 ADU73 Voltage Input to USB Interface User Manual Ver 2.0 www.ontrak.net...
- Page 2 1545 Maley Drive, Unit 3, Sudbury Country, Postal Code Canada P3A 4R7 Phone Number (705) 671-2652 Email tom@ontrak.net Name of Person binding the manufacturer. Tom Fortin- Director October 20, 2022 Ontrak Control Systems Inc Sudbury , Ontario, CANADA Page 2 of 18 ADU73 User Manual...
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Page 3: Table Of Contents
6c) Reading Input Levels (Streaming) 6d) Valid Input Voltage Range ADU73 Connection Diagrams 7a) Connecting to Resistive Position Sensors 7b) Connecting to Active Sensors 7c) Connecting to Thermistors 7d) Connecting to DC Voltages Specifications and Dimensions Page 3 of 18 ADU73 User Manual... -
Page 4: What Is Included And Where To Start
Programming examples include Windows, Linux, Python, C.NET, VB.NET, LabView, Matlab, OSX and others. First time users should first review the ASCII command set for the ADU73 and then use AduHidTest USB test software to become familiar with the operation of the various features of the product. -
Page 5: The Adu73 Status Led
-ADU73 disconnected from USB bus OR host computer has entered SLEEP/SUSPEND mode. The ADU73 can be connected to the USB bus via the enclosed 10' A-B USB cable. The cable provides both power and communications connections to the ADU73. When first connected, the STATUS led will turn RED indicating power is applied. -
Page 6: Aduhidtest Usb Device Test Program
AduHidTest is a Windows based USB device test program used to test the connection of ADU data acquisition devices to a USB port. The program is also a useful tool to allow programmers to become familiar with the ADU73 command set. - Page 7 STEP 2: Sending Commands to the ADU73 The first step in using the ADU73 is to send your desired configuration word to set sample speed and enable appropriate input channels for the application. For our example we will configure the ADU73 to sample at 10s/s with both channels enabled.
- Page 8 3. Receive data from the USB device. Now that the ADU73 is configured, the input data can be read. Type "RD0” into the device pipe send window and click Send ADU. An OK will appear beside the Send ADU button if successful. Click the Receive ADU button to retrieve data which will appear in the received data window.
- Page 9 Device Pipe. The ADU73 features a streaming function where the user can send a Stream Start (SS) command on the Device Pipe and the ADU will send data on the separate Stream Pipe at rates up to 1000 packets per second, depending on the Configuration Word setting.
- Page 10 Figure 11: Sending Stream Cancel (SC) Command Clicking the Stop Capture button does not stop the data stream from the ADU73. To stop the data stream, the Stream Cancel (SC) command should be sent on the device pipe. (Figure 11)
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Page 11: Adu73 Command Summary
Returns present reading for AN0 (8 bytes 00000000-16777215) Returns present reading for AN1 (8 bytes, 00000000-16777215) Returns present reading for AN0 and AN1 with a Space (20h) delimiter (17 bytes, 00000000 00000000 – 16777215 16777215) Start Streaming Cancel Streaming Page 11 of 18 ADU73 User Manual... -
Page 12: Adu73 Command Descriptions
6a) Determine and Send Configuration Word The ADU73 features a simple command set where all configuration data is sent to the ADU73 using a single configuration word consisting of 4 bytes. The configuration word sets the sample rate, and individual channel enables. - Page 13 NOTE: The effective resolution is determined by the selected sample rate. As the sample rate increases, noise increases, which reduces the effective resolution of the ADU73. Table 2 shows the effective resolution at all available sample rate settings for both ratio-metric and absolute measurements.
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Page 14: 6B) Reading Input Levels (Polling)
6c) Reading Input Levels (Streaming) The ADU73 can be configured to stream data to the host using the Stream Pipe. When streaming, readings are sent via the Stream Pipe to the host via a separate handle that is opened for streaming. The Stream Pipe is read only. -
Page 15: 6D) Valid Input Voltage Range
Figure 12: ADU73 Stream Packet Format 6d) Valid Input Voltage Range The ADU73 is a precision measurement device with an input voltage range of 0.000 - 5.000 VDC. The absolute maximum voltage input is +5.3V, and the absolute minimum voltage input is -0.3V CAUTION: Applied voltages above the absolute maximum, or below the absolute minimum, on any input may cause erroneous readings on one, or both inputs. -
Page 16: Adu73 Connection Diagrams
7b) Connecting to Active Sensors Active sensors can also be connected to the ADU73 with the only limitation being that a maximum of 20mA can be drawn from the +5.00VDC reference output to power the sensor. Figure 14 shows the connections to an MPXV5050DP pressure sensor from NXP. -
Page 17: 7C) Connecting To Thermistors
7c) Connecting to Thermistors The ADU73 can be connected to thermistors using an external bias resistor. The external bias resistor resistance depends on both thermistor resistance, and the application requirements, and should be selected to ensure a maximum of 20mA is drawn from the +5.00V reference output. Up to two thermistors can be connected to the ADU73. -
Page 18: Specifications And Dimensions
Input Current +/-3nA Special Functions 5.000 Reference Voltage Output 5.000V @ 20mA max. Mounting Options Flange Mount (STANDARD) , DIN Rail DIN Rail mount option available. Order part number ADU73-DIN C2023-Ontrak Control Systems Inc Page 18 of 18 ADU73 User Manual...
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