J
John
- Jan 1, 1970
- 0
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".
http://www.ni.com/pdf/products/us/20043762301101dlr.pdf
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 (http://www.meanwellusa.com/search/es25u/default.htm).
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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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".
http://www.ni.com/pdf/products/us/20043762301101dlr.pdf
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 (http://www.meanwellusa.com/search/es25u/default.htm).
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!
-- remove SPAMMENOT for e-mail responses --