1. #1
    RobL's Avatar
    Lives in Chipping Norton, United Kingdom. Last Activity: 31-01-2017 Has been a member for 2-3 years. Has a total post count of 7.
    Hi all

    Been a member for a while now, and have finally acquired a Tekcel V-Series 8x4 router. I'm looking after the computer end of the set-up at our workshop and have hit on a possible snag.

    There is a 50ft RS232 cable that came with the machine but I am about 6ft short to connect the PC to the router with the space we have available. I know that 50ft is the standard max length of these cables, so my question is really I can extend it with another 2m cable screwed into this one, or whether I am likely to experience problems of any sort?

    Also, with that sort of connection, any tips on what kind of cable would be best to buy? I have heard the terms 'handshaking' and 'non-handshaking' but I don't know if it makes any odds to this situation.

    Thanks in advance for your any help!

  2. #2
    Try it an see - 50 meters is not a hard limit. You could test with a multi-meter how the existing cable is wired, but to extend it all you need is a cable that connects pin 1 to pin 1 ... pin n to pin n.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  3. The Following User Says Thank You to Jonathan For This Useful Post:


  4. #3
    RobL's Avatar
    Lives in Chipping Norton, United Kingdom. Last Activity: 31-01-2017 Has been a member for 2-3 years. Has a total post count of 7.
    Thanks for the reply. I know it's not a hard limit, and I guessed there would probably be some headroom, just not sure how much as I know the signal quality does get degraded over distance with these cables. I'll pick up a normal cable later and see what happens...

  5. #4
    There are two kinds of handshaking with IBM RS232, hard wire and Xon Xoff.

    Xon Xoff are ASCII characters, basically sending an Xoff is the equivalent of, "Shut up" and Xon means "Resume transmission".

    Wire involves 2 wires, One end could raise RTS, Request To Send, then wait until the other raises CTS, Clear to send, before sending the data. Data Terminal Ready, Data Set Ready are similar. Ring Indicator is to say someone is trying to dial your Modem.

    Wired handshaking is uncommon, but very often people wire CTS back in to RTS and DTR back in to everyone else for instant gratification.

    Back in the day the notion was that a fancy screened RS232 cable was good for 10 feet while twisted pair was good for 100 yards.
    Last edited by Robin Hewitt; 23-01-2017 at 09:32 PM.

  6. #5
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Current Activity: Viewing Has been a member for 9-10 years. Has a total post count of 1,792. Received thanks 189 times, giving thanks to others 5 times.
    If it does prove to be a problem, you could look into either RS422/485 converters, or having just done a quick google, you can get RS232 repeaters/range extenders.

    The same google search threw up this supplier, with various options - http://www.tronicore.com/en/rs232-rs...422-converters
    Avoiding the rubbish customer service from AluminiumWarehouse since July '13.

  7. The Following User Says Thank You to m_c For This Useful Post:


  8. #6
    RobL's Avatar
    Lives in Chipping Norton, United Kingdom. Last Activity: 31-01-2017 Has been a member for 2-3 years. Has a total post count of 7.
    Thanks a lot for that info m_c - the machine will be online tomorrow and if I do have any issues I will look to one of those solutions.

  9. #7
    RobL's Avatar
    Lives in Chipping Norton, United Kingdom. Last Activity: 31-01-2017 Has been a member for 2-3 years. Has a total post count of 7.
    Well, to confirm, and for anyone else in a similar situation in future, my cable has worked out no problem. I have extended a 50ft serial cable with an additional 6ft and also it runs parallel with some power lines in places (unavoidable) and there are no data transmission issues with the machine.

Similar Threads

  1. RS232 Machine Link Cable
    By User_123 in forum Denford Routers
    Replies: 9
    Last Post: 24-12-2016, 12:50 AM
  2. Vfd cable
    By D-man in forum Spindles & Drive Motors
    Replies: 2
    Last Post: 29-06-2016, 01:23 PM
  3. Extending CY cable?
    By Dwayne Dibbley in forum General Electronics
    Replies: 8
    Last Post: 11-03-2015, 08:33 PM
  4. RS 232 to USB cable driver
    By charlieuk in forum Computer Software
    Replies: 15
    Last Post: 25-12-2014, 07:15 PM
  5. CNC controller with serial (RS232) communication
    By rnr107 in forum Motor Drivers & Controllers
    Replies: 15
    Last Post: 28-02-2012, 09:49 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
  •