SONOFF SPM Smart Stackable Power Meter SPM-Main+SPM-4Relay Power Meter Support 8-32GB TF Card for Apartment Supermarket

• A smart meter for commercial scenarios that the master and slave need to use together
• The product is a multi-functional smart meter with measurement, digital communication, and overload protection, which can help households adapt to the intelligent management of tiered electricity prices, and supports remote RS-485 digital interface communication
• SPM-Main and SPM-4Relay are the master and slave of the SONOFF smart stacking meter respectively, and they should be used together
• Through the host configuration network, after the network configuration is successful, the added slaves can be controlled in the App

Specifications:

• SPM: Smart Stackable Power Meter
• SPM-MAIN powered by: 3V, 1 x CR1220
• SPM-MAIN: Stackable Electric Meter Mainframe
• SPM-4RELAY: Stackable Meter Slave
• SPM-MAIN: local power statistics, LAN function, support for Ethernet, support for TF card (TF card supported by the SPM-MAIN: 8GB-32GB) The host supports adding up to 32 slaves
• SPM-4RELAY:
• Smart timing: the device performs the specified action at the specified time
• Power Statistics: Count the power consumption of a load over a period of time
• Operation records: records of equipment state changes
• Overload delay takes effect: real-time monitoring of changes in power parameters, for current and active power, the main chip supports the cloud to set the delay time for each sub-device. The overload delay effective function can prevent the channel from being closed by mistake due to exceeding the set threshold in a short time. The delay time range is 0-180 seconds.
• Overload protection: The maximum current supported by each channel is 20A. Exceeding the limit triggers overload protection.
• Overvoltage protection limit: 275V; Current protection limit: 25A (Note: The above data is fixed. The user can set the overload protection within the allowable range, but the limit protection cannot be changed)