3U OpenVPX Multichannel Discrete I/O Board

3U OpenVPX Multichannel Discrete I/O Board

Model 3U VPX 68DT1

3U OpenVPX Multichannel Discrete I/O Board

96-Ch, Discrete I/O (0 to 60 VDC, 500 mA/Ch.)


The 68DT1 is a 3U OpenVPX™ board featuring up to 96-Channels of Standard Functionality (SF) DT1 module-type or Enhanced Functionality (EF) DT4  module-type Discrete I/O functions [foptioned, factory configurable].48-Channels are dedicated as input (voltage or contact sensing with programmable, pull-up/pull-down current sources). An additional 24 or 48-Channels are programmable for either input or output (current source, sink, or push-pull) switching up to 500 mA per channel from an applied 3 – 60 V external VCC source (or sink to ISO-GND). The 68DT1 can sense broken input connections and whether an input is shorted to +VCC or to ground. Additional features of the DT4 EF are listed below. The 68DT1 offers unparalleled programming flexibility, a wide range of operating characteristics, and a unique design that eliminates the need for pull-up resistors or mechanical jumpers.

Backround Built-In-Test (BIT)

BIT continuously monitors the status of all I/O during normal operations and is totally transparent to the user. SBC resources are not consumed while executing BIT routines. This simplifies maintenance, assures operational readiness, reduces life-cycle costs and - keeps your systems mission ready.

One-Source Efficiencies

Eliminate man-months of integration with a configured, field-proven system from NAI. Specification to deployment is a seamless experience as all design, state-of-the-art manufacturing, assembly and test are performed - by one trusted source. All facilities are located within the U.S. and optimized for high-mix/low volume production runs and extended lifecycle support.

Product Lifecycle Management

From design to production and beyond, NAI’s product lifecycle management strategy ensures the long-term availability of COTS products through configuration management, technology refresh and obsolescence component purchase and storage.


68DT1 Block Diagram


  • 3U OpenVPX Profiles:
    • MOD3-PER-1U-16.3.3-2
    • SLT3-PER-1U-14.3.3
  • PCIe (x1)
  • 1x 10/100/1000 Base-T Ethernet
  • IMPC (option)
    • VITA 46.11 Tier-2 compatible
  • Commercial or ruged applications
    • Operating temp:
      • Commercial: 0 ºC to +70 ºC
      • Rugged: -40 ºC to +85 ºC
    • Conduction or air-cooled options
      • VITA 46/48/65 compliant
      • 4H, 0.8" Pitch
  • Power / Weight
    • 5V @ 1.5A (max.) (external Vcc not included)
    • 1.25 lbs. (est.)
  • 48-Ch. programmable for:
    • Input: voltage or contact sensing
  • 24-Ch. or 48-Ch. programmable for
    • Input: voltage or contact sensing
    • Output: current source, sink or push-pull (per cannel/bank)
  • Application features and support:
    • Current share, by connecting multiple channels in parallel
    • Handle high inrush current loads (for example, two #327 incandescent lamps in parallel)
    • Dual channel "turn-on" (series channel output) applications (e.g. dual series "key" missile launch control)
    • Ability to sense broken input connection and if input is shorted to +Vcc or to ground
    • Ability to read I/O voltage and output current (indicates if load is connected) 
  • 10 µs input timing resolution
  • Programmable input debounce circuitry (filter) with selectable time delay; eliminates false signals resulting from input relay contact bounce
  • Continuousd Built-In-Test (BIT)
  • Intelligent I/O library support included
  • (Optional) Enhanced (EF) Mode Operations
    • Input: Pulse Measurements, Transition Timestamps, Transition Counters, Period Measurement and Frequency Measurement
    • Output: PWM Output and Pattern Generator Output

N/A - If you're in need of specific functions please visit our Customer Configurable Systems page for options.