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Maximum length for RJ11 cable

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bastien2910 Posted messages 207 Registration date   Status Member Last intervention   -  
bastien2910 Posted messages 207 Registration date   Status Member Last intervention   -
Hello,

I would like to know what is the maximum length of an RJ11 cable without data loss?

Thank you in advance!

8 answers

  1.
    Smart91 Posted messages 30146 Status Security Contributor 2 331
     
    Is the communication interface between the weather station and the sensor a serial interface of the RS232C type? In this case, the length of the cable depends on the data transmission speed.
    Above are the values:
    Speed (bps)-----------------------------Length (m)
    19200--------------------------------------------15
    9600--------------------------------------------150
    4800--------------------------------------------300
    2400--------------------------------------------914

    Smart
    --
    "If you have no ambitions, you settle at the edge of the fall" (Kundera)
    4
  2. Shenzhen
     
    I think you're talking about RJ45 Ethernet wiring
    (RJ11 is used for telephony/modem, etc.)

    For RJ45 computer wiring, the maximum link length according to EIA (US) and EN standards is 90 meters, plus 5 meters of flexible connecting cable on each side.
    Basically, in private use, you can set up your installation over 90 meters without encountering any problems.
    2
    1. bastien2910 Posted messages 207 Registration date   Status Member Last intervention   29
       
      The cable is for a weather station, the cross technology WS2350; it supplies power and transmits information from the sensors.
      I believed it was RJ11, but let me know if I'm wrong based on the specifications I provided.
      But otherwise, if it's 90 m, I'm delighted!

      Thank you.
      0
      1. bastien2910 Posted messages 207 Registration date   Status Member Last intervention   29 > bastien2910 Posted messages 207 Registration date   Status Member Last intervention  
         
        Correction, it is indeed an RJ11, a cable used for the telephone, with 2 pairs.
        0
  3. kiki
     
    On the site: http://www.lacrossetechnology.fr/
    You need to click on "see details".

    Data transmitted by 433 MHz or via wired connection with the base
    Transmission distance via 433 MHz: 100 meters (in open field)
    Transmission distance via cable: 10 meters (with the possibility of adding a cable of up to 10 meters)

    If it's RS232, it's possible to use industrial converters
    => http://www.lextronic.fr/R1198-boitiers-tcpip--rs232.html

    You need to see if it's possible to connect 2 converters with a crosslinked ethernet cable (limited to 95m) or a wifi connection.
    I have used the EZL-200F through a WIFI bridge, but that was to control a light panel (so with a PC and software). You also need to plan for a 220V power supply or power through the ethernet cable (POE adapters).

    Be careful, to consult the PDF documentation on the EZL, you need an English/Korean version of the PDF reader.

    If the cable is limited to 20m, it may be that the speed is quite high...
    But all of this involves a lot of ifs...

    Best regards,
    1
  4. Smart91 Posted messages 30146 Status Security Contributor 2 331
     
    Hello,

    Are you sure you want to talk about the RJ11 cable for the telephone or the RJ45 cable for Ethernet?

    Smart
    --
    "If you have no ambitions, you settle at the edge of the fall" (Kundera)
    0
  6. bastien2910 Posted messages 207 Registration date   Status Member Last intervention   29
     
    I don't understand everything...
    But I finally installed the station with a radio connection (433MHz), but unfortunately, the connection isn't working, the base and its sensors are too far apart.
    How can I extend this connection distance (100 m)?
    Is there a "repeater" sold by La Cross Technology?
    0
  7. bastien2910 Posted messages 207 Registration date   Status Member Last intervention   29
     
    But the cable connecting the sensors to the base is not RS232, it's RJ11.
    And I am asking if, for example, if the radio connection is blocked by a wall or window, how to adapt an antenna outside.
    Maybe wrapping a wire around the base would do the trick; I've been told that it can help the connection.
    0
  8. bastien2910 Posted messages 207 Registration date   Status Member Last intervention   29
     
    Finally, after some adjustments and a recalibration of the Thermo/Hygro probe (the one that transmits the information)
    the connection is established. In theory, the maximum cable length is 85 m.
    I would like to thank: Smart91, Shenzhen, and Kiki.

    Status set to resolved.
    0
  9. Smart91 Posted messages 30146 Status Security Contributor 2 331
     
    Sorry, but this is no longer IT for me and I wouldn't be able to help you

    Smart
    --
    "If you have no ambitions, you settle at the edge of the fall" (Kundera)
    -1