Panel Measuring Instruments

The smart switch Sonoff SPM-Main allows energy consumption measurement and supports connectivity via Ethernet and Wi-Fi. It can manage up to 128 channels when combined with up to 32 SPM-4Relay switches (4 channels each), which are sold separately.

It features overload protection to prevent damage to devices. It is easy to install and suitable for various applications, such as measuring energy consumption in offices or shopping malls.

Communication with the Cloud is performed via Ethernet or Wi-Fi, while it connects to SPM-4Relay switches via RS-485 for stable long-distance transmission.

• Measurement of energy consumption in various spaces.
• Overload protection with automatic shutdown of equipment.
• Support for up to 128 channels.
• Ability to store historical energy consumption measurements for the last 180 days via SD card slot (8-32GB, SDHC).
• Easy installation on a power rail.

Manufacturer: Sonoff

Model: SPM-Main

Color: White

Input: 100-240V ~50/60Hz 50mA max.

Wi-Fi: 802.11 b/g/n 2.4GHz

Material: PC V0

Dimensions: 142.5 x 90 x 66.5mm

Compatible SD cards: 8-32GB, SDHC