Sonoff Smart Stackable Power Meter 4Relay

The Sonoff Smart Stackable Power Meter – 4Relay is the required unit which works using the SPM-Main unit.

Additionally the SPM-Main communicates with the cloud through Ethernet or WiFi, as well as communicates with the SPM-4Relays through RS-485, which allows for multi-terminal and stable long-distance data transmission.

**Note : The SPM-Main Unit and 4-Relay of the Stackable Power Meter need to be used together. However the Main Unit is connected to at least one 4-Relay to function.

Features

• One SPM- Main can be connected  with 32 SPM-4Relays.
• Power metering – In addition you can monitor the power consumption by checking eWeLink App on your mobile phone. Obtaining current, voltage as well as power easily.
• Max. 20A/Gang – Each channel can support maximum current of 20A, therefore no fear of high power load.
• Communicated by RS-485 -The SPM-Main communicates with the SPM-4Relays through RS-485, furthermore this allows for multi-terminal and stable long-distance data transmission.
• Overload Protection – Once the overload protection is enabled, it can protect your devices from burning out.