National Instruments Corporation NI PXIe-2725 18-Channel 8-bit Programmable Resistor
- Fully programmable resistance values up to 255 ohm in 1 ohm steps
- Up to 60 V or 0.3 A per channel
- Software configurable as an RTD simulator, potentiometer, or resistive load
- Built-in DMM port for easy connectivity and path verification
- Configure Complete PXI System
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The NI PXI-2722 is a 5-channel, 16-bit programmable resistor module capable of outputting resistance values up to 16 kiloohm in 0.25 ohm steps. Programmable resistors are test modules that replicate the behavior of resistance-based inputs and outputs such as potentiometers, resistance temperature detectors (RTDs), voltage dividers, and bridge elements. The NI 272x programmable resistor modules programmatically control a series of relays to vary the resistance across each channel on the I/O connector. This function is well suited for simulating environmental conditions in hardware-in-the-loop (HIL) validation.
Connectivity
Each NI 272x module uses a 37-pin D-SUB connector and 2x2 Micro-Fit connector on the front panel. National Instruments offers cables and screw terminal blocks for the 37-pin D-SUB connector and a cable accessory to connect the 2x2 Micro-Fit connector to a digital multimeter (DMM).
Software
The NI-272x installer includes reference VIs and example programs for using the device as an RTD, programmable potentiometer, or resistive load. The software provides a simple user interface that accepts inputs in units of temperature or resistance, and configures the resistance across each channel.