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National Instruments 778645-01 PXI Chassis

A descriptive part number for the PXI-1045 model, the 778645-01 from National Instruments is a versatile PXI Chassis that is designed to accommodate a wide range of test and measurement applications. It enables smooth trigger routing between devices with customizable trigger routing modules on its backplane. With two external reference clock BNC connections and an increased temperature range, it ensures versatility in a wide range of applications and situations.

This chassis integrates an 18-slot PXI backplane with a strong power supply and a well-thought-out structural layout to improve usability. It increases operating efficiency due to its modular construction, which guarantees excellent maintainability and a quick mean time to repair (MTTR).

The 778645-01's compatibility with both regular CompactPCI products and 5 V and universal PXI-compatible products is one of its primary features. This ensures that the system can include components with or without PXI-specific functionality, giving it configuration freedom. With an input voltage range of 100-240 VAC and an operating voltage range of 90-264 VAC, the chassis offers a variety of power supply choices. It ensures safe operation under a range of load circumstances by incorporating a 12 A circuit breaker for over-current prevention.

One of the main characteristics of the 778645-01 PXI Chassis is its efficient cooling mechanisms. Each slot maintains the installed modules at the optimal operating temperatures thanks to an adjustable fan speed and 25 W of cooling capacity. The direction of airflow from P1 to P2 ensures good cooling from the bottom to the top of the chassis.

The chassis uses three 140 cfm fans and a high/auto speed switch to create forced air circulation, which provides enough cooling for the power supply unit and the modules. Exhaust is funneled along both sides and the top of the chassis, while intake is placed at the bottom rear of the chassis to guarantee efficient heat dissipation. Air circulation is facilitated by an incorporated fan on the left and right sides of the 778645-01's power supply unit. This layout maximizes cooling effectiveness and extends internal component life.