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60V Multi Node Bus Power Line Communication

TejVir Singh
Prodigy 30 points
Other Parts Discussed in Thread: THVD8010, THVD8000

We want to monitor individual PV Panels performance by monitoring Current & Voltage and same data to be transfer on same Common 60V DC Line (9-60v) to Combiner/Inverter via PLC.

We need to connect 50-75 nodes and data is approx. 48bytes/node /minutes at 1200~38400 baud.

We could not find any reference design for 60v PLC with low side Current  measurement with any vendor,

Can anybody help us?

Below Links are also not opening, Pls arrange directly to my email:

https://www.ti.com/lit/ug/tidu160/tidu160.pdf

https://www.ti.com/tool/tida00067

  • 0
    TI__Mastermind 25705 points

    The two links are pointing to the same design file. You can find it in this e2e thread.

    For your specific application, you may also want to check out these two newly released transceivers THVD8000/THVD8010.

    Regards,

    Hao

  • 0 in reply to Hao L
    Prodigy 30 points

    Thanks for the Link.

    For our application :

    1. How we interface multi-60vDC Powered bus with THVD80x0 (it has CMVR= -7~12V, +18v Fault protection)? Any reference design with protections?

    2. Does it require to isolate THVD8000 from Micro-Controller side in our application?

    3. What we can do to ignore/minimise BUS cabling effects in our application (Practically not possible to match different field cabling parameters) ?

    Regards,

    TVSingh

  • 0 in reply to TejVir Singh
    TI__Mastermind 25705 points

    TVSingh,

    You're correct about the THVD8000/8010 pin spec. However since the data is AC coupled to the bus by capacitor, 60VDC doesn't present at the transceiver pins. Some discussion can be found in this design guide.

    Since THVD8000 doesn't share the transmitted power, isolation is not necessary.

    You can design the system based on the worst case (longest cable with biggest loss). The design should work with the other scenario.

    Regards,

    Hao

  • +1 in reply to Hao L
    Prodigy 30 points

    Thanks to clear my doubts.

    Rregards,

    TVSingh