Ametek / VTI Instruments / VXI Technology VM7004-5 Programmable Resistor Module

The Ametek VM7004-5 is a four-channel programmable resistor module engineered for VXIbus test systems requiring precise resistance simulation, sensor emulation, and calibration functionality. This card delivers independent programmable resistance channels in a compact C-size form factor, with up to three modules stackable in a single slot for 12 total channels. Four-wire connections on each channel eliminate lead resistance effects, while a dedicated four-wire monitor bus enables in-system calibration and self-test routines.

Technical Specifications

Resistance Ranges (VM7004-5 Option)

• 0 Ω to 163,830 Ω Alternate Options


• Option 6: 0 Ω to 1,638,300 Ω


• Option 7: 0 Ω to 16,383,000 Ω Standard Individual Channel Range


• 0 Ω to 16,383 Ω Parallel Configuration Ranges


• Two channels: 0 Ω to 8,192 Ω with 0.5 Ω step size


• Four channels: 0 Ω to 4,096 Ω with 0.25 Ω step size Series Configuration Ranges


• Two channels: 0 Ω to 32,768 Ω


• Four channels: 0 Ω to 65,536 Ω Accuracy


• ±0.02% of programmed value ± 0.5 Ω Electrical


• Maximum power dissipation: 0.5 W at 40°C


• Thermal offset: ≤ ±25 µV

Key Features

• Four independent programmable resistance channels per module


• Four-wire measurement connections for lead-resistance compensation


• Four-wire monitor bus for calibration and diagnostics


• Software-selectable operating modes: individual, potentiometer, parallel, and series configurations


• Message-based and register-based VXI control


• VXIplug&play driver compatibility

Typical Applications

• RTD and sensor emulation


• Process control simulation


• Automated test equipment (ATE) calibration


• System self-test and validation

Compatibility & Integration The VM7004-5 integrates into VXIbus C-size slots and supports standard VXI control protocols. Driver support via VXIplug&play simplifies deployment into existing test architectures.