Sonoff SPM 4-Relays

Sonoff SPM - Smart Stackable Power Meter

The stackable SONOFF power meter implements smart management with overload protection, metadata monitoring and electricity statistics. SPM-Main communicates with the cloud via Ethernet or WiFi and communicates with the SPM-4Relays relay via RS-485, which enables more end-to-end and stable remote data transmission.

Want to know the changes in power consumption for each channel? Do you want to implement a unified management of the entire shopping center? By checking the eWeLink application on your mobile phone, you can monitor your electricity consumption without having to leave home. With eWeLink, you can get power consumption by touch.

Once the overload protection is activated, you don't have to worry about electrical appliances burning out, which helps eliminate potential safety risks. In addition, you can also set an overload delay to prevent annoying triggers. The 32SPM-4 relay can be connected to one SPM-Main. Each SPM-4Relay has 4 isolated channels that help the tenant solve the problem of electric charge sharing. Each channel can support a maximum current of 20A.

Get more than 180 days of energy usage data, available local storage on SD card. You can insert the SD card into SPM-Main and download and check more than 180 days of your power usage history at any time of the day via the HTTP API. No need to worry about missing important information.

Up to 120 separate channels:

Installation scheme:

Parameters of 4ch relays + main units: