![]() Low voltage installers have no formal training on electrical codes and concepts, they just know hey + to +, – to -, we got us some serialz woohoo. It doesn’t mention that RS485 could present a very serious issue with ground differential if it’s being wired to a device with both grounds connected together, or between devices with a dissimilar ground, which is very possible given the use case would often involve pool and/or sprinkler equipment, which could be in an adjacent building. It’s just like hey, plug your serial crap in using our pin-outs and you’re good to go. combined with the lack of meaningful guidance from the home automation vendor Elan Nortek Security & Control LLC, maker of the Elan G! system my home uses. ![]() ![]() This was likely the fault of my A/V installer having no clue about electricity, serial comms, etc. I recently had a power surge come through my Pentair IntelliTouch-based pool control system, destroying its control board, and unfortunately destroying the control module of my home automation system on the other side of a serial connection into it. ![]()
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