Sonoff SPM-Main Smart Switch

Sonoff SPM-Main Smart Switch

Sonoff SPM-Main smart switch that allows energy consumption measurement and supports Ethernet and Wi-Fi connectivity. It can handle up to 128 channels - you can combine it with up to 32 SPM-4Relay switches (4 channels each), which are available for purchase separately. What's more, overload protection prevents damage to your devices. The product is also very easy to install.

Numerous applications

The SPM-Main switch will prove its worth in many different applications. For example, it will allow you to find out how much electricity your tenants use per month or find out the energy consumption of a shopping center or office. The product will also prove useful in a server room or cryptocurrency mine - the overload protection function will allow you to avoid damaging certain equipment.

Reliable signal transmission

Enjoy the ability to connect devices. SPM-Main communicates with the cloud via Ethernet or Wi-Fi connectivity. It also connects to SPM-4Relay switches via RS-485, so it can provide stable long-distance transmission. Connection problems are a thing of the past!

Meter for measuring electricity consumption

Do you want to check the changes in electricity consumption in every room in the office? Or are you interested in how much electricity your tenants use? With Sonoff this is possible! SPM-Main and SPM-4Relay switches allow you to accurately measure electricity consumption. You can find all the information in the eWeLink app. This allows you to check your electricity consumption without leaving the house - just reach for your phone!

Overload protection

Increase security in your server room and don't be afraid of damaging your devices. The switch offers an overload protection function. When you enable it, the equipment will turn off automatically when the current, voltage or power reaches the value specified in the application. A load delay function is also available.

Supports up to 128 channels

One SPM-Main module allows you to control up to 32 SPM-4Relay switches. What's more, each SPM-4Relay offers up to 4 independent channels with a maximum load of 20A each. This means that the SPM-Main module can manage up to 128 channels! This makes it ideal, for example, for a block of flats, making it possible to check the energy consumption of tenants of rental apartments.

Additional options

You can also save the history of energy consumption measurements from the last 180 days. The switch is equipped with an SD card slot (8-32 GB, SDHC). This allows you to conveniently export data and gives you the assurance that you won't lose important information. Installing the SPM-Main and SPM-4Relay switches will also not cause you any problems. You can easily mount them on the guide rail. Note: SD card is not included.

Specification