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32-Channel current sourcing (600mA) digital output board with voltage and current monitoring

DNx-DIO-433, DNA-DIO-433, DNR-DIO-433, DNF-DIO-433


  • 32 digital outputs
  • 600 mA (current source) outputs
  • Wide 3.3 to 36 VDC output range
  • 1 kHz maximum update rate

Guardian Series Diagnostics

  • Programmable overcurrent protection (50 mA to 1 A)
  • Programmable overcurrent duration limits
  • PWM based soft-start/stop reduces inrush current “shock”
  • Monitors each channel’s output voltage and current allowing automatic detection of shorts/open and other system failures
32-Channel current sourcing (600mA) digital output board with voltage and current 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-433, DNA-DIO-433, DNR-DIO-433, DNF-DIO-433

DNx-DIO-433 (Guardian series) boards are 32 channel, digital output boards. Each channel is configured as a current source and switches voltages between 3.3 and 36 VDC. Each channel is rated for continuous operation at 600 mA with an output voltage drop of less than 550 mV. The DNx-DIO-433 is an ideal digital output interface in a wide variety of data acquisition and control applications.

As part of UEI's Guardian series, the DNx-DIO-433 not only controls the digital outputs, it also allows monitoring of each channel's output voltage and current. This allows the application to detect and flag short and open circuits as well as other "suspicious" behavior.

The Guardian advantage also includes programmable overcurrent protection. The user may select the current and duration of overload (as short as 10 mS) required before the channel is shut down. Each board provides 350 Vrms isolation and update rates to 1 kHz.

Each channel offers a pulse-width-modulated (PWM) "soft-start/stop" capability. This allows power to be applied/removed gradually, greatly increasing the reliability of devices like incandescent bulbs where thermal shock reduces life expectancy.



  • PowerDNA
  • UEIModbus

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In this Master Class, UEI application engineer Austyn Turner walks through our sophisticated and reliable on-board monitoring diagnostics we call “Guardian”, also known as "Built-In-Test" or BIT.

Pulse Width Modulation (PWM) Overview

United Electronic Industries manufactures a number of products specifically designed to monitor and control pulse width modulation (PWM). In this video we explain the characteristics of PWM and demonstrate a few real world applications using the UEI Guardian Series boards.