The Sonoff SPM-Main power meter control module is used to optimize and meter the energy consumption of energy-consuming systems. This smart device provides reliable protection against the overloading of appliances in case of abnormal situations. Monitoring data is stored in the cloud or on an SD card for 180 days. Allows connection of up to 32 SPM4 relays via RS-485 bus. Can be controlled via EWeLink smartphone app. Mounting is quick and easy on a standard DIN rail.
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