Ametek / VTI Instruments / VXI Technology 52-0912-100 CT-400 Modular 13-Slot VXI Mainframe Power Supply

The CT-400 is a 13-slot C-size VXIbus mainframe delivering over 1100 W of usable power for modular test system integration. This mainframe combines a modular power supply assembly with a 10-layer stripline backplane, advanced thermal management, and comprehensive health monitoring to support instrumentation and switching applications.

Technical Specifications

• 13-slot C-size VXIbus configuration


• Modular chassis design


• 10-layer stripline backplane with optimized power distribution and minimized crosstalk


• Automatic active Bus Grant and IACk jumpering Power Delivery


• Total usable power: >1100 W


• Modular power supply assembly


• All seven VXIbus supply lines available on rear panel for external device powering


• Each supply line protected to 1 A with self-healing fuses


• Protection: short circuit, over-voltage, reverse voltage, and thermal shutdown Thermal Management


• Pressurized plenum system with custom baffling


• Fan control: low, high, or variable speed modes


• Variable mode: automatic speed adjustment based on power usage and ambient air temperature


• Quiet operation Monitoring & Control


• Eight TTL trigger lines (rear panel accessible)


• Remote power-off input


• Fan tachometer outputs


• Over-temperature interrupt


• Over-voltage interrupt


• Over-current interrupt


• Over-ambient air temperature (>55 °C) interrupt


• Fan-speed drop interrupt


• Main fault interrupt output (logical OR of all fault conditions)


• Fault output signal for system failure flagging


• Front panel voltage monitor indicators and status LEDs

Green LED: voltage within limits

Red LED: over-voltage condition

Unlit LED: under-voltage condition

Key Features

• Modular power supply delivering >1100 W for flexible instrument integration


• Fault monitoring with eight discrete interrupt signals and main fault output


• Dual-mode cooling with variable temperature and load-based fan control


• Self-healing fuse protection on all seven supply lines


• TTL trigger distribution for multi-instrument synchronization


• Visual and signal-based health indication for remote monitoring

Typical Applications Automated test equipment (ATE), modular instrumentation systems, RF/microwave test platforms, and integrated switching architectures requiring distributed power and trigger distribution.

Compatibility & Integration Designed for VXIbus instrument and switching system integration within modular test architectures. Rear panel distribution of power lines and trigger signals enables straightforward integration with external equipment and systems.