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Powerline modem

Discussion in 'Electronic Design' started by Marco Trapanese, Nov 2, 2012.

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  1. Hello,

    what would you recommend to communicate over a powerline? I'm talking
    about a 230VAC L+N.

    The best would be a completely transparent modem.
    I used Cypress CY8CPLC10 chips but they require a lot of external
    components and they are quite expensive.

    Some colleagues discouraged me to use ST and NXP powerline products.
    They say those components aren't very reliable.

    What do you think about?

  2. Il 02/11/2012 17:04, Andrzej Ekiert ha scritto:

    I did something similar years ago - like an rtty transceiver. Ok,
    different frequencies but similar concept.

    I was afraid it doesn't work on a noisy and wide power network of a
    large apartment.

    But if you did that I'm sure it works!
  3. Guest

    This appears to be 230/400 Vac 50 Hz environment with possibly three
    phases even in every apartment in an apartment building,

    There might be problems communicating between devices, connected to
    different phases. The only communication path would be through
    capacitive coupling in the feeder cable to the distribution panel.
  4. Il 02/11/2012 20:55, ha scritto:

    Here is very unlikely to have different phases in each apartment of the
    same building.
    Of course isn't possible to communicate between two apartments due to
    the power meter which "isolate" each one. But I don't want this.
    I want to communicate within the same apartment only.

    About the coupling with the power line, do you know any app note that
    describes the best ways to design the front-end?

  5. Guest

    I have 3x16 A circuit breakers for the electric stove in my 7th floor
    apartment (after a renovation two years ago). I have not measured, if
    the mains sockets in different rooms are on different phases.
    I have only been involved with powerline communication, in order to
    prevent the buildup of internet service providers from using PLC
    technology, due to the RF pollution caused by these PLC systems.

    Anyway powerline communication is usable at reasonable bit rates and
    reasonable distances. Have you studied for instance what couplers LON
    ( systems are using ?
  6. Il 03/11/2012 13:55, Andrzej Ekiert ha scritto:

    I'm talking about my (little) experience here in Italy.

    I did some tests with my front-door friends and our energy meters
    prevent the communication.

  7. Il 03/11/2012 15:17, Andrzej Ekiert ha scritto:

    I guess you're right.

    yep, this one:

  8. Jasen Betts

    Jasen Betts Guest

    It depends what you want.

    how much range, how much bandwidth, how much cost....
  9. Il 03/11/2012 15:31, Jasen Betts ha scritto:

    within a single apartment.

    about 2400 bps is enough.

    as low as possible, of course ;)
    But I'd prefer smaller size rather than lower cost.

  10. linnix

    linnix Guest

    My power company uses 2.5GHz smart meter. They probably know something about what not to use. i.e. Powerline modem. 2.5GHz is more standalize than 430/800/900MHz and not much more expensive.
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