When I measure a resistance between channel 0 and channel 1 of NI PXI-2510, the resistance is about 0.6 Ω. My PXI-2510 was configured to short channel 0 and channel 1. What is the internal switch resistance?
PXI-2510 fault insertion unit(FIU) is designed for hardware-in-the-loop(HIL) applications and electronic reliability test. Each module has a set of feedthrough channels that you can open or short one or more fault buses.The maximum DC path resistance between Channel and DUT is 150 mΩ. If you short channel 0 and channel 1, the total of the four switch relays are shorted in series as shown below. Therefore, in this case, the resistance between channel 0 and channel 1 will be 600 mΩ(0.6 Ω).
Note: DC path resistance typically remains low for the life of the relay. At the end of relay life, the path resistance rapidly rises above 1 Ω. Load ratings apply to relays used within the specification before the end of relay life.
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