How Are The Various Components Of A CompactRIO Grounded?Hardware: CompactRIO
Problem: I have a CompactRIO with various modules installed. How are the modules grounded in relation to the chassis and controller? How does the chassis ground relate to the power supply input and module grounds? Solution: The C-Series modules in the CompactRIO chassis have various types of channel and bank isolations detailed in the module's specifications document. However, the COM (common) lines themselves are all tied together and ground within the module. They are isolated and floating in relation to the chassis and controller. The controller shares a ground with the chassis, and this ground is in turn connected to the chassis ground screw located on the side of the chassis. The C (common) input on the power supply connector for the CompactRIO controller is also tied to the chassis ground. Thus there is only one common ground throughout the chassis and controller. Each module however contains its own isolated ground. This configuration allows the user to create many grounding arrangements. If you wish to have the modules tied to the same ground within the chassis and controller, connect a wire between the COM input on the module and the chassis ground screw. Or you could connect the module's COM input to any ground you may require for your application. If additional power supply isolation is desired for your application you can also connect a DC to DC power supply to the power supply connector of the CompactRIO controller to isolate it from the rest of the power network. Related Links: KnowlegeBase 2MQE698V: Grounding: Terms and Symbols Attachments:
Report Date: 12/27/2006 Last Updated: 03/13/2009 Document ID: 44QCB4TQ |
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