1. #1
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 6 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,837. Received thanks 192 times, giving thanks to others 5 times.
    Is it safe to connect the COM on a VFD to gnd?

    I've just realised I've never needed to worry about this before, but it's the first time I'm needing to connect a VFD to a 0 to +/-10V output that isn't isolated.
    The inverter in question is an old KEB Combivert, and I can see nothing in the manual warning against not connecting the COM to gnd. Having scanned the manual for the Huayang inverter, it makes no mention either.

    I'm just wanting to clarify before I blow the inverter and/or KFlop/Kanalog!

  2. #2
    It is "usual" practice to ground the 0v but I dunno about the drive you have. Have you checked continuity between COM and earth/heatsink?

  3. #3
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 6 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,837. Received thanks 192 times, giving thanks to others 5 times.
    I've not checked continuity. It was something that occured to me while I was in the middle of sorting out all the old wiring, and thought I'd better check before I release smoke from anything.

  4. #4
    You'll probably find the COM is already connected to ground via the earth terminals and heatsink or mounting plate

Similar Threads

  1. Help with Mach3 inputs and VB script ?
    By EddyCurrent in forum Artsoft Mach
    Replies: 6
    Last Post: 27-11-2013, 06:35 PM
  2. FOR SALE: AXYZ USB to RS-485 optically isolated converter for sale 260 ono
    By RickyThunders in forum Items For Sale
    Replies: 0
    Last Post: 18-07-2011, 11:30 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •