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4x 3U OpenVPX MOSA Actuator Interface Unit

SIU34-AIUVARM-01 is a Modular Open Systems Approach (MOSA) DO-178C & DO-254 Certifiable Actuator Interface Units (AIU) with low power high performance OpenVPX Xilinx UltraScale+ SBC with Quad Core ARM Cortex -A53, 8 GB DDR4 SDRAM, 32 GB SATA Flash, 2 x 10/100/1000Base-T Ethernet, USB 3.0, FIPS-140-3 Level 3 Cyber Security, and Single Event Upset support. 

Configured to support dual or tri-redundancy using Serial CCDL or ARINC-429/575 Interfaces. Options for TSN, TTE, AFDX or ARINC664p7 redundancy are also available.

The SIU34-AIUVARM-01 is ideally suited to support several platform flight control systems including fixed-wing aircraft, rotary aircraft, eVTOL and rocket systems. The SIU34-AIUVARM-01 takes advantage of NAI’s COSA Architecture: a flexible, adaptable, configurable, modular and expandable solution that offers an almost infinite number of configurations while eliminating hardware and software NRE redesign. Certifiable RTOS support includes DDC-I Deos 653 and Wind River VxWorks HVP.

  • 2 x MIL-STD-1553 & 12 x Programmable Discrete IO (CM8)
  • 16 x ±100 VDC A/D Channels (ADF)
  • 8 x Programmable RS-232/422/485 Serial Channels (SC3)
  • 2 x AC Excitation References (AC2)
  • 4 x LVDT Measurement Channels (LD2)
  • 4 x ±40 VDC 100 mA Digital to Analog Channels (DA3)
  • 24 x ARINC-429/575 Channels (2 x AR1)
  • 16 x Programmable RTD or Thermocouple measurement (2 x TR1)
  • 16 x Variable Reluctance/Pulse Counter Measurement Channels (VR1)
  • 28 VDC Input PSU per VITA 62 (VPX68) with at least 50 ms holdup.
  • MIL-STD-810G, MIL-STD-461F and DO-160 environmental and EMI/EMC qualifications.

Accelerate Your Time-to-Mission™ With COSA®

NAI’s Configurable Open Systems Architecture™ (COSA®) offers a choice of over 70 smart I/O, communication, and Ethernet switch functions, providing the highest packaging density and greatest flexibility of any multifunction I/O board in the industry. Preexisting, fully-tested functions can be combined quickly and easily in an unlimited number of ways. Each I/O function has dedicated processing, unburdening the system Single Board Computer (SBC) from unnecessary data management overhead.

Related COSA® Products
Just How Configurable Are NAI's COTS Systems?

Need more or less configurations than the SIU34-AIUVARM-01? Choose from NAI's standard COTS configurable systems that you can populate with pre-integrated boards, smart function modules, power supplies and software libraries of your choice.

Model Dimensions w/ Connectors
(w x h x d)
Weight / lbs.
(Fully populated)
Function Module
Board Slots Board Formats
NIU1A 6.8” x 1.5” x 2.5” < 1.2 1 N/A Integrated System
NIU2A 7.0” x 3.0” x 2.5” < 2.75 2 N/A Integrated System
NIU3A 7.2" x 5.65" x 3.25" < 5.4 3 N/A Integrated System
NIU3E 7.2" x 6.6" x 3.0" < 6 1 N/A Integrated System
SIU31 4.71” x 2.35” x 8.71” < 5 3 1 cPCI
9.4” x 5.7” x 3.9” < 11 6 2 OpenVPX
SIU33 4.71” x 4.78” x 8.71” < 10 9 3 cPCI
SIU33V 4.71” x 4.78” x 8.71” < 10 9 3 OpenVPX
SIU34 9.4” x 5.7” x 5.9” < 16 12 4 OpenVPX
SIU35 7.13” x 4.76” x 8.71” < 15 15 5 cPCI, OpenVPX
SIU36 7.13“ x 4.71“ x 8.91“ < 23 18 6 OpenVPX
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