Description
The ADU72 USB to Current Input interface enables measurement of 4-20mA and 0-20mA signals from standard process transmitters via a single USB connection.
The ADU72 internally generated 24VDC loop supply eliminates the need for an external loop power supply allowing direct connection of 2-wire process transmitters.
This low-cost USB to Current Input Interface is easy to use with VB, VB.NET, Visual C++,
C , MATLAB, LABView etc. via standard HID drivers included with Windows.
A mini-driver (DLL)* is also provided, allowing control using standard ASCII commands using familiar readfile and writefile commands.
The ADU72 includes a 10' USB cable and is available in a flange mount enclosure with a DIN rail mount option.
Click here to view sample connection diagrams.
Download the ADU72 Operating Commands
Download the ADU72 User Manual
Download
ADU72 3D STEP files for FLANGE or DIN mounting types.
Key Features
- Reads loop current with 16-bit resolution and outstanding accuracy.
- Conformal coating on sensing circuity ensures reliable operation in humid environments.
- Retrieved data available in DECIMAL, HEX or CURRENT format.
- Connect two-wire process transmitters with no need for external power supply.
- Reads and powers 2-wire, 3-wire* and 4-wire* transmitters.
- Loop over-current protection (26mA)
- 2500V Isolation from USB connection to loop.
- Bus Powered
- High retention USB Connector
- CE Marked
- Bi-colour LED status indicator.
- High quality cage-clamp type terminal blocks.
- Uses standard HID drivers included with Windows 32-bit or 64-bit
- Mini-driver (DLL) provided. See Programming Page for details
- Meets IEC61000-4-2 ESD protection for USB port.
- 2-wire and 3-wire power available is 24VDC @ 35mA MAX
- Available in flange (standard) or DIN rail mount.
Typical Applications
- 4-20mA Transducer Interface
- Industrial Instrumentation Systems
- SCADA Systems
- OEM Instruments Embedded Control
Technical Specification
Supply Voltage
NONE (Bus Powered)
USB Supply Current (internal 24V supply)
180mA Typical 300mA Max
USB Supply Current (external loop supply)
70mA Typical 100mA Max
Operating Temperature
-25C Min to 60C Max
Total Absolute Unadjusted Error
+/- 0.05% FSR MAX
Full Scale Error
+/- 0.03% FSR MIN
Temperature Stability
+/- 50 ppm FSR/Degree C
Data Format
HEX or DECIMAL or CURRENT
Max Recommended Sample Rate
500 s/s
Operating Environment Humidity
0 to 90% RH (non condensing)
Loop Compliance Voltage
4V
Internal Loop Power Supply
Maximum Supply Current Output
35mA
Internal Loop Power Supply
Internal 24VDC supply eliminates the need for an external loop power supply.
Flange Mount (STANDARD), DIN Rail
Pricing
IMPORTANT: Specify mounting option when ordering.-FLANGE(standard) or -DIN . See Mounting Options for details.
Mounting Options
