SONOFF Smart Wi-Fi SPM 4-Relay Switch

Allows connection of up to 32 SPM-4-relay relays
You can connect 32 SPM-4 relays to one SPM-main. Each SPM-4Relay has 4 isolated channels to help you manage your devices more conveniently.

Consumption measurement (Smart Stackable Power Meter)

You can monitor consumption bychecking the eWeLink apponyourmobilephone. Easily obtain information about current, voltage, and power.

Supports a maximum current of 20A/channel
Each channel can support a maximum current of 20A without fear of being unable to operate more demanding consumers.

Supports RS-485 communication protocol
SPM-Main communicates with SPM-4 relays via RS-485, enabling multi-terminal and stable data transmission in the case of longer connections

Overload protection
When overload protection is enabled, it can protect your devices from excessive electrical current

Note: The main unit (SPM-MAIN) and 4-relay power meters must be used together. The main unit must be connected to at least one 4-channel relay to operate.

Technical information:

Nominal voltage 100-240V~ 50/60Hz Number of connections 4 Maximum load 20A/channel, 80A/total maximum load Wireless connection Wi-Fi IEEE 802.11b/g/n 2.4GHz RF 433 MHz No DIY mode No Declaration of conformity CE, FCC Operating temperature -10°C~40°C Housing material PC V0

Manufacturer's website: https://b2b.itead.cc/spm-4relay.html

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