The Ametek VTI Instruments SM3001 is a high-density, two-wire multiplexer module for VXIbus systems that routes signals across 64 individual channels, each rated for 2 A continuous switching. Engineered for automated test environments requiring flexible signal distribution, the SM3001 preserves signal integrity through multi-layer PCB design, extensive ground planes, and shielding. Its control circuitry supports quiescent operation to minimize digital noise when switching low-level signals. The module enables direct register control of all relays, maximizing switching speed by reducing VXIbus backplane traffic. Mix-and-match compatibility with other SMIP (Switch Modularity and Interface Platform) cards allows construction of custom, high-density switching configurations.
– Technical Specifications
• Configuration: Two-wire
• Channel Count: 64 channels
• Current Rating per Channel: 2 A (switching and carry)
• Path Resistance: 50 MHz
• Switching Time: < 1 ms
• Mechanical Rated Operations: 100 × 10⁶ cycles
• Electrical Rated Operations: 1 × 10⁶ cycles at full load
• System Compatibility: VXIbus
– Key Features
• Individual relay control with direct register access
• Hardware-implemented Break-Before-Make (BBM) and Make-Before-Break (MBB) switching modes
• Synchronous triggering and asynchronous control options
• Programmable timing delays for relay settling times
• Downloadable scan lists with backplane trigger advancement
• Automatic channel sequencing via predefined scan lists
– Switching Configurations
The SM3001 supports 1-wire, 2-wire, and 4-wire switching topologies, enabling adaptation to diverse measurement architectures. Up to 384 two-wire channels can be housed in a single double-slot VXIbus card (SM1000B) for maximum density applications.
– Typical Applications
Automated test systems, multi-channel signal routing, high-speed data acquisition, production test environments, and laboratory measurement setups requiring flexible channel switching and low-noise operation.
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