Programmable Resistor Ranges

Programmable resistor ranges feature high setting resolution with excellent stability and accuracy through the use of innovative switching networks and software correction techniques. This also means all resistance values can be set – there are no missing values due to switch resistance or resistor tolerance.

Sensor Emulation Applications

They are ideal for sensor emulation applications that require very fine adjustment and also have the capability of being set as open or short circuit to simulate faults in cabling systems. The range includes modules specifically designed for RTD and strain gauge simulation.

Signal switching and conditioning solution provider Pickering Interfaces has added to its range of PCI and PXI programmable resistors. The existing PCI high-density precision resistor card (model 50-297) and PXI high-density precision resistor module (model 40-297) have been expanded to increase its existing 6 versions to 42. Each version provides endusers with the choice of number of resistor channels, resistance range and the resistance setting resolution. Depending on the version, the resolution is from 0.125Ω to 2Ω and resistor channel counts from 3 to 18. Resistor values up to 1.51MΩ can be simulated.

Programmable Resistors

The company has introduced the PCI programmable resistor and relay card (model 50-293) and the PXI programmable resistor and relay module (model 40-293) for simulating resistors. There are 12 versions available with resolutions ranging from 0.25Ω to 2Ω and channel resistor channel counts of either 2 or 4. In addition, each of the 12 versions has the option of adding 8 SPDT relays which can be used for other switching functions within a test system.

All the PCI and PXI resistors are programmed by the use of resistance calls from the driver. The driver uses calibration data from the module to give the best setting available to the user and can also return the theoretical value of the resistor to the user.

Basic accuracy is 0.2% ± resolution for the 40-297 and 50-297 and 1%± resolution for the 40-293 and 50-293.

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Further Information

If you would like any further information from the team at Softei, please contact us on either Tel. No. 01483 410 877, via e-mail at or via our Facebook page, and we’ll be happy to answer any of your questions.

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