Ametek / VTI Instruments / VXI Technology SMP5001 General Purpose Relay

The Ametek VTI Instruments SMP5001 is a general-purpose relay module for high-density switching applications within the VXIbus platform. This 80-channel SPST relay card integrates into the VXI Technology SMIP II signal switching series, enabling flexible configuration across automated test equipment, data acquisition systems, and industrial control applications. The module switches up to 300 V AC/DC at 2 A maximum with path resistance below 300 mΩ and thermal offset under 7 µV per channel.

It combines with other switch modules in SMP1100 or SMP1200 base units to build application-specific test configurations.

Technical Specifications

Electrical Performance

• Maximum switching voltage: 300 V AC, 300 V DC


• Maximum switching current: 2 A


• Maximum switching power: 60 W DC, 125 VA


• Path resistance: 1 × 10⁹ Ω


• Maximum thermal offset per channel (HI-LO): < 7 µV


• Open channel capacitance: < 50 pF


• Channel-mainframe capacitance: < 80 pF


• High-low capacitance: 100 MHz Frequency-Domain Performance


• Insertion loss at 100 kHz: < 0.1 dB


• Insertion loss at 1 MHz: < 0.2 dB


• Insertion loss at 10 MHz: < 1.0 dB


• Crosstalk at 100 kHz: < -80 dB


• Crosstalk at 1 MHz: < -60 dB


• Crosstalk at 10 MHz: < -40 dB


• Isolation at 100 kHz: < -50 dB


• Isolation at 1 MHz: < -45 dB


• Isolation at 10 MHz: < -40 dB Switching Characteristics


• Mechanical switch life: 1 × 10⁷ operations


• Electrical switch life: 5 × 10⁵ operations at full load


• Switching time: < 3 ms

Key Features

• 80 SPST relay channels per module


• VXIbus form factor for single-slot or double-slot integration


• Fail-safe interrupt input opens all relays on fault condition


• Alternative configurations available: SMP5002 (50 SPDT), SMP5003 (26 SP4T)


• Maximum density: 480 individual SPST relays in double-slot SMP1200 card

Typical Applications

• Automated test equipment signal routing


• Data acquisition multiplexing


• Industrial control switching matrices


• RF and analog signal distribution

Compatibility & Integration Designed for VXIbus mainframes and fully compatible with the SMIP II signal switching platform. Operates with SMP1100 single-slot and SMP1200 double-slot base units.