PXI Programmable Resistor Modules are well‐suited for simulating environmental conditions in hardware‐in‐the‐loop (HIL) validation. The software included provides a simple user interface that accepts inputs in units of temperature or resistance, and configures the resistance across each channel. Each module uses a 37‐pin D‐SUB connector on the front panel, as well as a 2x2 Micro‐Fit connector for easy connection to a PXI Digital Multimeter (DMM).