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48-Channel digital input board with voltage monitoring

DNx-DIO-448, DNA-DIO-448, DNR-DIO-448, DNF-DIO-448


  • Sample rate of 1 kS/sec
  • Programmable input transition levels
  • Programmable hysteresis
  • 350 VAC isolation
  • Monitors contacts without external components
  • Programmable debounce intervals

Guardian Series Diagnostics

  • A/D allows voltage measurement on each input, allowing quick and accurate diagnosis of short/open circuits as well marginal or failing drive circuitry
48-Channel digital input board with voltage monitoring
Product Style: What do the "DNx" prefixes mean? "DNA" prefix is for a Cube & MIL Cube Board, "DNR" prefix is for a Rack & MIL Rack Board , and "DNF" prefix is for a FLATRACK board.
Software/Programming: How UEI solutions are used. Hosted - Connected to a PC with Windows, Linux, QNX, VxWorks, RTX, or similar OS. Hosted also is for OPC-UA, Modbus and EtherCAT. Standalone - Controller with Linux or VxWorks OS, Simulink I/O Target or UEILogger. Available options for this product are shown in the drop down menu.
Quantity: $1650
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Typically in stock for shipment in 3-4 weeks. Subject to global supply chain challenges.

DNx-DIO-448, DNA-DIO-448, DNR-DIO-448, DNF-DIO-448

The DNx-DIO-448 (Guardian series) is a 48-channel, high performance digital input board designed for use in a wide variety of digital monitoring applications.

The "Guardian advantage" on the DNx-DIO-448 is an innovative A/D input approach allowing the board to offer incredible input flexibility. A diagnostic input mode monitors the actual analog voltage at each input, allowing quick and accurate detection of short and open circuits as well marginal or failing drive circuitry. The analog input capability is also a powerful installation, diagnostic and data acquisition tool.

The board offers programmable logic thresholds and hysteresis over the full input range. Thresholds and hysteresis are independently programmable on each channel. The board supports user programmable debouncing intervals which may also be set on each channel independently.

The DNx-DIO-448 reads all 48 bits at sustained rates in excess of 1 kS/second. Each channel is configured with a 33 kΩ pull up/down resistor. This makes the board an ideal solution for monitoring contact closures as well as standard voltage inputs. The pull-up/pull-down resistors are configured by connecting the “PLEVEL" pins on the I/O connector to Vcc or ground. Each board provides 350 Vrms isolation. All inputs are overvoltage protected to ±40 VDC, and against ESD.

The DNx-DIO-448 is a member of UEI's popular Guardian series, which provides high levels of user diagnostics. The DIO-448 board provides voltage monitoring and monitor switch functionality to help protect against hardware failure.



  • PowerDNA
  • UEIModbus

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