CIU3 – Embedded Multifunction I/O System
CIU3 – embedded multifunction I/O system with COSA® expansion from North Atlantic Industries (NAI) is a powerful, rugged, and ultra-flexible embedded I/O system designed for mission-critical air, land, and sea platforms. Delivering extensive built-in functionality and support for up to three COSA® smart modules, the CIU3 allows engineers to rapidly configure a high-performance, low-SWaP system tailored to their exact application requirements.
Built around an ARM® Cortex®-A53 processing architecture and equipped with rich communications and I/O interfaces, the CIU3 provides a complete, self-contained solution that accelerates development, reduces integration risk, and simplifies deployment in demanding environments.

Range features
A high level overview of what this range offers
-
Extensive preconfigured I/O — Ready out of the box Four serial channels, A/D conversion, discrete I/O, ARINC, CANBus, and MIL-STD-1553 functionality are all included, minimising the need for external boards or additional hardware.
-
High flexibility with COSA® smart module support Up to three configurable COSA® function modules deliver unmatched I/O scalability with 100+ modules available, enabling tailored system configurations with minimal NRE.
-
Powerful ARM® processing platform Integrates a dual-core (optional quad-core) ARM Cortex-A53 processor for user applications, local control, and system management—ideal for edge processing and time-critical tasks.
-
Rich communications interfaces Dual Gigabit Ethernet ports, multiple serial channels, ARINC, CANBus, and MIL-STD-1553 support ensure seamless interoperability with avionics, ground vehicles, naval systems, and industrial networks.
-
Rugged, conduction-cooled design Engineered for harsh environments with a compact, conduction-cooled chassis that maintains reliability across extreme temperature, vibration, and shock profiles.
-
Continuous built-In test (BIT) Automated background diagnostics ensure system health, faster troubleshooting, and high mission reliability—critical for safety-focused applications.
-
SWaP-optimised architecture Small footprint, low power consumption, and a unified I/O platform reduce cabling, integration time, weight, and system complexity.
-
Broad OS support for rapid development Compatible with Xilinx PetaLinux, VxWorks 7.x, and DDC-I Deos™, enabling straightforward integration into new or legacy real-time software architectures.
What’s in this range?
All the variants in the range and a comparison of what they offer
| Category | Specification |
|---|---|
Processing | AMD/Xilinx® Zynq® UltraScale+™ SoC |
Built-In I/O (Standard) | |
Expansion | Up to 3× COSA® smart modules (100+ module types available) |
Networking | 2× 10/100/1000BASE-T Ethernet |
Debug / Maintenance | RS-232 debug port |
Software Support | PetaLinux 2023.x, VxWorks® 7.x, DDC-I Deos™ RTOS |
Cooling | Conduction-cooled |
SWaP Profile | Compact, low-power, rugged SFF design |
Special Variants | CIU3P model offers PCIe-only interface modules for Slot 1 (M1) |
System Reliability | Continuous Background BIT |
Deployment Environments | Airborne, Ground, Naval, Industrial & Harsh Environments |
Connector Options | Deployed system connector key configuration available |




