The Keysight E8400A is a 13-slot, C-size VXI mainframe engineered to deliver stable, high-performance support for automated test and measurement systems. It combines 700 W of usable power capacity with intelligent thermal management, enabling reliable operation of multiple VXI modules in demanding environments. The mainframe achieves full compliance with VXIbus specification revision 1.4, VXIplug&play specification VPP-8, and VMEbus system specification revision C—ensuring seamless integration into existing test architectures.
Technical Specifications
• Chassis: 13-slot, C-size VXI mainframe
• Usable Power Capacity: 700 W
• Module Support: Accommodates up to twelve C-size modules; A- and B-size modules accepted with optional adapters (e.g., HP E1403/7)
• AC Input: 90–264 VAC, 47–66 Hz; alternatively 90–132 VAC at 360–440 Hz
• DC Input: 100–270 VDC
• Inrush Current: 40 A maximum
• Total Input Power: 1.5 × (power output + 75 W) + 150 W
• Fuse Protection: 250 V, 15 A, fast blow
• Module Weight Limit: 3.5 Kg (7.7 lbs) per slot
• Unloaded Weight: 20.9 Kg (46 lbs)
– Key Features
• Thermal Management: Advanced cooling architecture with impeller fan for quiet operation; selectable Variable or Full Speed modes via front panel switch. Separate power supply cooling fan provides independent air path. Recommended 50 mm clearance at rear and upper sides for proper airflow.
• Power Protection: All outputs protected against over-temperature, over-voltage, over-current, and short-to-ground faults with full shutdown recovery upon power cycle.
• System Monitoring: Front panel diagnostic connector enables local or remote monitoring of power supply voltages, temperature, and fan operation.
• Mains Interface: Detachable IEC320 socket; chassis ground tap (M4 × 0.7 threaded insert) on rear panel.
– Compatibility & Integration
Full compliance with VXIbus revision 1.4, VXIplug&play VPP-8, and VMEbus revision C ensures straightforward integration with standard VXI instrument modules and existing test frameworks. Optional adapters extend compatibility to smaller form factors.

















