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National Instruments 784782-01 PXI Chassis

The part number 784782-01 from National Instruments is the identifying part number for the PXIe-1088 PXI Chassis. This chassis features 9 slots out of which 8 are hybrid slots. The 784782-01 operates with an AC input range of 100 to 240 Volts AC, 50/60 Hz, with a current rating of 7 to 3.5 Amperes. It supports an operating voltage range from 90 to 264 Volts AC and an operating frequency range from 47 to 63 Hz. The chassis has a typical efficiency of 78% and includes internal fuse protection for over-current scenarios. The main power disconnect is facilitated by the AC power cable, while the front-panel power switch controls the internal chassis power supply to the PXI Express backplane.

The chassis delivers multiple DC output voltages for example +5V_AUX at 2.7 Amperes, +12 V at 28.6 Amperes, +5 V at 27.1 Amperes, +3.3 V at 30.8 Amperes, and -12 V at 0.75 Amperes. These outputs maintain load regulation within ±5% and have specified ripple and noise limits. The total maximum power available is 329 W, with a combined power limit of 162 W for the +3.3 V and +5 V rails. The chassis includes comprehensive over-current and over-voltage protection mechanisms, ensuring reliable operation under varying conditions.

The 784782-01 PXI Chassis features a unique cooling system, using forced air circulation with two 150 CFM fans to ensure optimal thermal management. Airflow is directed from the bottom to the top of the module, with intakes located at the bottom and exhausts at the top and right side of the chassis. The slot cooling capacity is rated at 58 W for slots 2 through 8, and 38 W for slot 9. The power supply cooling is managed by integrated fans, with air intake at the front and left side, and exhaust at the rear.

This 784782-01 chassis is designed to operate at altitudes up to 2,000 meters and is rated for Pollution Degree 2, indicating suitability for indoor use only. The operational temperature range is 0 °C to 50 °C when all peripheral modules require ≤38 W cooling capacity per slot, and 0 °C to 40 °C when any peripheral module requires >38 W cooling capacity per slot.