Are the Common Reference "COM" Terminals on My Device Connected?

Updated Feb 9, 2018

Reported In

Hardware

  • NI-9205

Issue Details

I am using a cDAQ module to measure electrical signals and noticed that there are multiple COM terminals. Are these common reference terminals connected? If I ground one COM terminal, will the other COM terminals have the same ground?

Solution

The COM terminals on your device are the common reference connections to isolated ground. These COM terminals are all connected, and reference the same common ground. 

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