The NI 778662-01 is a modular power supply and fan assembly engineered as a direct replacement for the National Instruments PXI-1042 chassis. This integrated unit consolidates power distribution and active cooling into a single serviceable component, minimizing mean time to repair (MTTR) and streamlining field maintenance. The assembly delivers stable, regulated power across multiple voltage rails to support 3U PXI and CompactPCI modules in demanding measurement and automation environments.
Technical Specifications
• Output Voltages: 3.3 V (line regulation <±0.2%), 5 V (line regulation <±0.1%), ±12 V (line regulation <±0.1%)
• Input Power: Universal AC input with 10 A circuit breaker protection
• Efficiency: 70% typical
• Operating Temperature Range: 0 to 55 °C
• Cooling: Integrated high-performance fans with selectable speed control (HIGH for maximum cooling, AUTO for temperature-responsive operation)
• Environmental Qualification:
– Functional Shock: 30 g peak, half-sine, 11 ms pulse (IEC 60068-2-27)
– Random Vibration Operating: 5 to 500 Hz, 0.31 gr ms (IEC 60068-2-64)
– Random Vibration Nonoperating: 5 to 500 Hz, 2.46 gr ms (IEC 60068-2-64)
– Key Features
• Filtered forced-air cooling with intake through lower rear filters and exit via upper side and top vents
• Fan speed selector switch on rear panel for operational flexibility
• 10 MHz reference clock I/O with BNC IN/OUT connectors for clock distribution and external synchronization
• Remote power inhibit and voltage monitoring via DB-9 connector
• Chassis ground screw provided
• Eight captive mounting screws for secure installation
– Compatibility & Integration
Designed exclusively for the National Instruments PXI-1042 chassis, which supports 3U PXI and CompactPCI modules and includes integrated 10 MHz reference clock, PXI trigger bus, star trigger, and local bus connectivity.
