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Difference between PCI-6514 and PCI-6515

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What is the difference between "source" output in the PCI-6514 and "sink" output in the PCI-6515? Does it matter? All I need to do is open or close a 10mA current-limited circuit.
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Hi RJE,

The difference between a source and a sink output is whether it provides a ground or voltage source. So, depending on your circuit, if you need a ground then select the 6515 for its sink output, and if you need a voltage source use the 6514.

Here is a good knowledgebase on the topic.

Understanding sourcing and sinking

Hope this helps!

Jeremy L.
National Instruments
Jeremy L.
National Instruments
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