We'd like to use a National Instruments USB-6009 DAQ module for measurements of current/voltage in an electronic load and to provide digital-I/O control of the load and analog voltages to the load to vary the load's "resistance".
The DAQ module is operated from a Dell desktop system (120VAC, North America) via a USB cable directly to the system (no hub).
The electronic load is powered via a Meanwell ES25U "wall-wart" 12V power supply
Are there any safety issues here since both devices are attached to the 120VAC mains? The wall-wart mentions an Isolation Resistance spec, "I/P-O/P:100M Ohms / 500VDC/ 25/ 70% RH", which sounds like it's fully isolated up to 500V?
We can opto-isolate the digital I/O to/from the DAQ module but the analog I/O would be straight from the DAQ module (which does not mention any isolation at all). We just wanted to be careful here since we weren't quite sure of what safety issues might be involved.
Thanks!
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