Due to the functionality of measuring electricity, they cannot be used as a dry contact according to the old instructions. You need to open and cut the circuit. It is very convenient to buy them, like any devices of acar, in the Amazon store, lowering cashback on them (who has) Has pros: A bunch of these relays in use. Everything works as expected based on known reviews and experience Different cons: Previously, they lost the hub when it was de-energized. Already half a year should be fixed with a new firmware. Haven't lost it since, but I keep watching.
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