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simk avatar image
simk asked

Orion Smart and remote control with BMS and engine switch

Hi

I have Orion Smart DC DC (non-isolated) installed to charge the LiFePo4 battery bank with alternator. Per user manual, I have connected REC BMS charge enable to pin H, and engine switch to pin L. Everything works fine, until both signals are at 0V. I would anticipate Orion shuts down when both pin H and L are at 0V but this is not the case. The issue is, when engine is OFF and BMS stops charging, Orion is active and drawing current from engine battery. Am I missing something?

Thanks!

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2 Answers
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kevgermany answered ·

When L and H are bridged, the Orion is ON.

I suspect that when both signals are at 0V, both are doing this by grounding to the chassis, thus bridging the inputs and switching the Orion on.

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simk avatar image simk commented ·
It is a fibreglass boat installation, but yes, negative is common so I guess this is the case.
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petaramesh answered ·

Also you may not need to use an engine switch at all on the Orion Smart, only the BMS, and let Orion's engine run detection do it for you.

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