Ametek / VTI Instruments / VXI Technology SMP3001DS 64-Channel Multiplexer Module

The SMP3001DS is a 64-channel multiplexer module for VXIbus systems, engineered to route multiple input signals through a single measurement channel. Part of the SMIP II series, this plug-in module delivers high-density switching in a compact form factor, enabling efficient sequential sampling of numerous sensors and test points while reducing system complexity. Configurable as either a 1×64 two-wire multiplexer or 1×128 one-wire multiplexer, the SMP3001DS integrates directly into VXIbus mainframes and combines with other SMIP II modules to build flexible, scalable switch matrices supporting up to 384 two-wire channels per double-slot VXIbus card.

Technical Specifications

• Channels: 64 (1×64 two-wire or 1×128 one-wire)


• Switching Voltage: 300 VDC, 300 VAC


• Switching Current: 2 A maximum per channel


• Switching Power: 60 W DC, 125 VA; 60 W DC, 62.5 VA


• Bandwidth: >50 MHz (−3 dB), >100 MHz


• Path Resistance: <0.5 Ω, 10⁸ Ω


• VXIbus Slots: Single-slot (SMP1100) or double-slot (SMP1200) compatible

Key Features

• Multi-layer PCB construction with ground planes and shielding to minimize crosstalk


• Internal capacitive discharge relays protect sensitive circuits from residual voltages; discharge function is software-disableable for high-throughput, low-voltage applications


• Signal and control grounds isolated to maintain measurement integrity


• Break-Before-Make (BBM) and Make-Before-Break (MBB) switching implemented in hardware


• Programmable scan lists with configurable timing delays and backplane trigger advancement


• Individual relay control and path-level programming options


• Internal confidence checking confirms relay closure status


• Extensive triggering capability for synchronized multi-instrument operation

Typical Applications Multi-point sensor monitoring, automated test systems, data acquisition from distributed measurement nodes, high-density signal switching in laboratory and production environments.

Compatibility & Integration Register-mapped VXIbus interface with VXIplug&play driver support. Mixes and matches with other SMIP II modules within SMP1100 and SMP1200 VXIbus mainframes.