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July 2025
781986-27
781986-27, 16 Bits, 9 Channels, PXIe-2727 Programmable Resistor Module
Actual item may vary if no part number is provided on quote request.
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Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments 781986-27 Programmable Resistor Module
National Instruments part number 781986-27 is an identifying part number for the PXIe-2727, a PXI Programmable Resistor Module with 9 Input Channels all with 16-bit resolution. The NI 781986-27 is a test module designed to simulate resistance-based inputs and outputs, such as potentiometers, resistance temperature detectors (RTDs), voltage dividers, and bridge elements. It programmatically controls a series of relays to adjust the resistance across each channel of an I/O connector. This capability makes it ideal for simulating environmental conditions in hardware-in-the-loop (HIL) validation.
The software offers a user-friendly interface that accepts inputs in units of temperature or resistance, allowing precise configuration of the resistance across each channel. For channels set between 20 Ω and 64 Ω, the accuracy is less than 5.0%. For channels set between 64 Ω and 255 Ω, the accuracy improves to less than 2.0%. Specifically, for channels of the 781986-27set between 20 Ω and 40 Ω, the accuracy is less than 10.0%; for channels set between 40 Ω and 120 Ω, it is less than 5.0%; for channels set between 120 Ω and 400 Ω, it is less than 2.0%; and for channels set between 400 Ω and 16,000 Ω, the accuracy is less than 1.0%.
Channel accuracy depends on the total resistor accuracy, relay and trace path resistance, and temperature effects. The module's front panel features a 37-pin D-SUB connector, ensuring versatile and reliable interfacing with external devices and systems. Additionally, it includes a 2 × 2 Micro-Fit connector designated for the DMM port, providing secure and efficient connectivity for digital multimeter (DMM) applications. Regarding power requirements, the 781986-27 operates with a power input of 1.2 W at 3.3 V, and it can draw a maximum of 11 W at 12 V, accommodating various power supply configurations and ensuring optimal performance under different operational conditions.
| Model | 781986-27 |
|---|---|
| Model Name | PXIe-2727 |
| Part Type | PXI Programmable Resistor Module |
| Input Channels | 9 |
| Relay Type | Reed |
| Front Panel Connector | 37-pin D-SUB |
| Simultaneous Drive Limit | 161 relays |
| Relay Operate/Release Time | 250 μs |
| Minimum Pulse Width | 150 ns |
| DMM port | 2 × 2 Micro-Fit connector |
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