The NIU3E is a robust, aluminum, conduction-cooled system that requires mounting to a cold plate. Key construction and operational characteristics of the NIU3E include:

Mechanical Design:

The system is made of rugged aluminum and employs conduction cooling. Mounting holes are provided on the chassis bottom housing flanges, and it must be mounted considering thermal management to ensure the chassis thermal interface (bottom surface) does not exceed 71°C. The chassis ground point is located on the connector side of the NIU3E and secured with a #6-32 threaded insert . Thermal and Power Specifications:

It operates within an input voltage range of 18 to 36 VDC (28 VDC nominal). The base unit consumes approximately 0.675 A (~19 W) at 28 VDC nominal, with the total power consumption dependent on the modules installed. The system should dissipate no more than ~25 watts when properly mounted and maintained at a temperature not exceeding 71°C. Operating temperature range is from -40°C to 71°C, and storage temperature ranges from -55°C to 105°C . Connectors and I/O Interfaces:

The front panel includes connectors for Primary Power (J1), various I/O interfaces (J2 and J3), and Ethernet (J4 to J6). J7 is an optional fiber optic connector . Dimensions:

The dimensions of the NIU3E are approximately 7.1 inches in depth, 3.2 inches in height, and 7.2 inches in width . Overall, the NIU3E is designed for rugged and thermal efficient operation in harsh environments, with comprehensive I/O and power management to support various configurations dependent on the user’s needs.