Ametek / VTI Instruments / VXI Technology SMP2001A Power Switch Module

The Ametek / VTI Instruments / VXI Technology SMP2001A is a power switch module for VXIbus and SMIPII™ systems, delivering high-capacity switching in a compact card-slot form factor. It has either 20 SPST or 10 DPST relay channels rated at 16 A per channel, capable of handling up to 250 V AC or 125 V DC. Maximum switching power reaches 300 W DC or 2000 VA per channel, with aggregate module capacity of 25 kW.

A fail-safe interrupt input enables automatic relay opening during safety-critical events.

Technical Specifications

• Switching Configuration: 20 SPST 16 A or 10 DPST 16 A channels


• Maximum Voltage: 250 V AC / 125 V DC


• Maximum Current: 16 A per channel


• Maximum Power: 300 W DC / 2000 VA per channel; 25 kW module aggregate


• Breakdown Voltage: 1,000 V RMS (open contacts)


• Path Resistance: 1×10⁹ Ω


• Thermal Offset (HI-LO): < 50 µV


• Open Channel Capacitance: < 20 pF


• Channel-Mainframe Capacitance: 20 MHz


• Switching Time: < 10 ms


• Mechanical Life: 5×10⁷ operations


• Electrical Life: 1×10⁵ operations at full load

Key Features

• Low insertion loss: < 0.2 dB at 100 kHz, < 0.5 dB at 1 MHz, < 1.0 dB at 10 MHz


• Excellent crosstalk isolation: < -75 dB at 100 kHz


• Fail-safe interrupt input for emergency power shutdown


• Driven from VXIbus +5 V supply


• Interchangeable with other SMIPII™ modules

Typical Applications

• AC line power switching


• DC and AC power supply control


• Industrial machinery and robotics relay control


• Automotive engine control circuits


• Solenoid switching


• Unit Under Test (UUT) power management

Compatibility & Integration The SMP2001A integrates into standard VXIbus card slots and operates within SMIPII™ mixed-card systems. The front-panel fail-safe interrupt line provides independent safety control independent of VXIbus communications.