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BRX Relay output module

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  • #16
    Originally posted by Mike Nash View Post
    Some do, some don't. Some model cards do, other models don't in the same PLC system. Let's just say it makes things "interesting" in an un-fun kind of way.

    The D2-12TR uses an MOV and an inductor. I couldn't tell you if this accomplishes the same thing as the RC for preventing interference with the processor. I can tell you it doesn't make the LED indicators glow.
    The D2-12TR actually states a leakage spec identical to BRX. Go figure.

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    • #17
      Maybe release a second version of the card for sale alongside the output cards we have now that specifically have no snubbers? Save cost on not including them and then sell it for the same price and make more money to cover the cost of needing to do the second line of stock. And only release it for Do-More products and dont go back to DLogic to further push people onto the new platform. Since people want to interface with LEDs or other PLC brand inputs they are mostly resistive load anyway so no real need for snubbers for voltage spikes anyway. Perhaps even put in the description that it is a "PLC interface designed card" or something like that to help customers understand.

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      • #18
        Originally posted by MikeN View Post
        Maybe release a second version of the card for sale alongside the output cards we have now that specifically have no snubbers? Save cost on not including them and then sell it for the same price and make more money to cover the cost of needing to do the second line of stock. And only release it for Do-More products and dont go back to DLogic to further push people onto the new platform. Since people want to interface with LEDs or other PLC brand inputs they are mostly resistive load anyway so no real need for snubbers for voltage spikes anyway. Perhaps even put in the description that it is a "PLC interface designed card" or something like that to help customers understand.
        Our original design plan was to eliminate them, but we put sites on the board because we've always used them. When testing at 264V at rated current bad things happened, so we populated them. When we moved from the onboard to the module we kept the same circuit, but admittedly didn't test the modules without them. It is possible they aren't needed, but unknown. Wouldn't take much to test...just gotta find a free second.

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