Discover our Clipsal Smart Home packages as seen on the Block

in location

OR

I'm looking for

  • Wholesalers
    • Uncheck All Check All
  • EXPERTISE
    • Expand
    • Expand
    • Expand
    • Uncheck All Check All
  • Switchboard Manufacturers
    • Uncheck All Check All
OR

The best way to see what Clipsal electric products can do for your home is seeing them in action at a Clipsal Display Centre.

Product stock may vary according to location. If you're after a specific product range, please check with your chosen location before visiting.

10 Results
    Load More Load Complete
    Change Location

    What is the Difference Between Shield and Common on a RS485 Communications Port.

    Issue
    User maybe confused about when to use the shield or common on a RS485 port

    Product link
    PowerLogic and ION Power Meters

    Environment
    Serial Communications

    Cause
    Some RS485 communication ports have both a common and shield pin. Please see the picture below for reference

    Resolution
    The shield terminal is a landing terminal not internally connected. It is meant as a landing for connecting incoming and outgoing shield.

    The Common terminal is electrically connected to the internal floating RS485 circuit that drives + & -.
    A recommended example of a daisy chain connection to a meter without a "common “is shown below. To be sure please check the install guide for the specific meter you are installing.  The "best" connection scheme depends on the internal circuits of the other device and the type of wire being used. Most devices without a labelled common use the terminal labeled "shield" also as a common (when it is connected internally to the circuit driving + and -).





     

    Didn’t find what you were looking for?

    Try Searching Again View Our Categories

    Need further assistance?

    Our Customer Care department provides total customer service solutions for our residential, industrial and commercial applications.

    Get Assistance