Ametek / VTI Instruments / VXI Technology SMP1100 Single-Slot Base Unit

The Ametek/VTI Instruments/VXI Technology SMP1100 is a single-slot base unit that supplies power and thermal management for VXI and PXI instrument modules. It delivers 5 VDC at up to 20 A (100 W maximum) from a universal 100–240 VAC input, with inrush current limiting built in. The variable-speed, thermally controlled fan maintains stable operating conditions in the chassis, while VXIplug&play compliance and PXI trigger bus support enable integrated test system operation across standard instrumentation platforms.

Technical Specifications

• Output voltage: 5 VDC


• Output current: 20 A


• Maximum power: 100 W


• Input voltage: 100–240 VAC, 50/60 Hz


• Inrush current limiting: Standard Thermal Management


• Fan control: Variable speed, thermally controlled


• Operating temperature: 0°C to 50°C


• Storage temperature: −40°C to 70°C


• Operating humidity: 10% to 90% non-condensing Interfaces


• VXIbus: VXIplug&play compliant


• PXI trigger bus: Supported


• Status indication: Power, fault, and fan operation LEDs


• Remote sense: Included for accurate voltage regulation Physical


• Form factor: Single-slot VXI/PXI module


• Weight: Approximately 1.5 kg

Key Features

• Universal AC input (100–240 VAC, 50/60 Hz) eliminates regional power supply concerns


• Integrated inrush current protection extends component life


• Remote sense provision ensures voltage accuracy at the load


• Thermally controlled fan adapts to thermal load, reducing noise during light-load operation


• Status LEDs provide at-a-glance power and fault visibility

Typical Applications

• Standalone instrument power and cooling in single-slot VXI systems


• Modular test systems requiring distributed power architecture


• Laboratory and production environments with standard chassis infrastructure

Compatibility & Integration The SMP1100 integrates into standard VXI and PXI chassis and supports any single-slot instrument module drawing up to 100 W. VXIplug&play compliance and PXI trigger bus connectivity enable straightforward integration into multi-module test configurations.