NIU1U
Rugged Embedded Multifunction I/O System with 1 Expansion COSA® Module Slot
The NIU1U is a small, rugged, low-power, self-contained multifunction I/O system that can can also be configured with one smart Configurable Open Systems Architecture™ (COSA®) function modules. The NIU1U boasts a Dual Core ARM A53 processor for customer application and I/O and communications management. The NIU1U is configured with two 10/100/1000Base-T (GbE) Ethernet ports or one 10/100/1000Base-T (GbE) Ethernet port with USB 2.0 and an RS-232 port for maintenance / diagnostic or configuration interface. Ideally suited for rugged Mil-Aero applications, the NIU1U delivers off-the-shelf solutions that accelerate deployment of SWaP-optimized systems in air, land and sea applications.
The NIU1U rugged multifunction I/O and communications platform provides scalable system level solutions enabling networks including on-board vehicle, marine and aircraft platforms, to field and expand digital network architectures for network-centric operations. Single module slot allows for PCIe capable modules that offer support for single channel, Tri-Redundant TTE/AFDX/A664p7/Best Effort Ethernet, 2 x 10/100/1000 Base-T Ethernet or 2 Node 3 Port Firewire (IEEE 1394).
docs.naii.com Link
12/15/2025 8:17:24 AM
5/28/2026 9:02:43 AM
The NIU1U includes SSKs to support multiple operating systems. In addition, SSKs are supplied with source code and board-specific library I/O APIs to facilitate system integration.
docs.naii.com Link
docs.naii.com Link
NAI’s Configurable Open Systems Architecture™ (COSA®) offers a choice of over 100 smart I/O, communication, and Ethernet switch functions, providing the highest package 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. Choose the ideal platform for your application below. Each I/O function has dedicated processing, unburdening the system Single Board Computer (SBC) from unnecessary data management overhead.
Related COSA® Products
Need more or less configurations than the NIU1U? 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. | Function Module Slots |
Board Slots |
Board Formats | SOSA™-Aligned |
|---|---|---|---|---|---|---|
| CIU3/CIU3P | 9.5" x 8.25" x 1.125" (CC*) | < 4.5 lbs. (CC*) (fully populated) | 3 | N/A | Integrated System | N/A |
| NIU1A | 6.8" x 1.5" x 2.5" (CC*) | < 1.2 lbs. (CC*) (fully populated) | 1 | N/A | Integrated System | N/A |
| NIU2A | 7.3" x 3.1" x 2.7" (CC*) | < 2.7 lbs. (CC*) (fully populated) | 2 | N/A | Integrated System | N/A |
| NIU3A | 7.2" x 5.5" x 3.2" (CC*) | < 5.4 lbs. (CC*) (fully populated) | 3 | N/A | Integrated System | N/A |
| NIU3E | 7.2" x 7.1" x 3.2" (CC*) | < 7.7 lbs. (CC*) (fully populated) | 1 | N/A | Integrated System | N/A |
| SIU31 | 4.7"x 2.4" x 8.7" (CC*) | < 3.15 lbs. (CC*) (unpopulated**) | 3 | 1 | cPCI | N/A |
| SIU33 | 4.7" x 4.8" x 8.7" (CC*) | < 5.5 lbs. (CC*) (unpopulated**) | 9 | 3 | cPCI | N/A |
| SIU35 | 7.1" x 4.8" x 8.7" (CC*) | < 7.5 lbs. (CC*) (unpopulated**) | 15 | 5 | cPCI | N/A |
| SIU34 | 5.7" x 5.9" x 9.4" (CC*) | < 9.7 lbs. (CC*) (unpopulated**) | 12 | 4 | OpenVPX | N/A |
| SIU36 | 9.0" x 5.0" x 9.5" (CC*) 9.0" x 6.4" x 9.5" (AC*) |
< 13.2 lbs. (CC*) (unpopulated**) < 14.4 lbs. (AC*) (unpopulated**) |
18 | 6 | OpenVPX | N/A |
| SIU32S | 6.0" x 4.6" x 9.5" (CC*) 6.2" x 4.8" x 9.5" (AC*) |
< 6.6 lbs. (CC*) (unpopulated**) < 6.9 lbs. (AC*) (unpopulated**) |
6 | 2 | OpenVPX | Yes |
| SIU34S | 7.8” x 5.1” x 9.5” (CC*) 6.0" x 7.2" x 9.5" (AC*) |
< 9.2 lbs. (CC*) (unpopulated**) < 9.7 lbs. (AC*) (unpopulated**) |
12 | 4 | OpenVPX | Yes |
| SIU36S | 10.0" x 5.1" x 9.5" (CC*) 6.1" x 9.5" x 9.5" (AC*) |
< 13.2 lbs. (CC*) (unpopulated**) < 14.4 lbs. (AC*) (unpopulated**) |
18 | 6 | OpenVPX | Yes |
NOTE*: (CC) = Conduction-Cooled, (AC) = Air/Convection-Cooled
NOTE**: To get fully populated chassis weight, add 1.35 lbs. for each SBC or I/O CCA and 2.2lbs. for PSU.
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