Smart energy meter's system module with 4 relays

SPM-MAIN is the main device required to interact with the SPM-4RELAY relay units. SPM devices are excellent power measurement devices, especially for use in larger buildings such as shopping centres or offices.

• Power measurement (current, power, voltage) and switch for easy placement in the fuse box
• Compatible with DIN rail
• Do not use this device as a fuse!
• Up to 32 SPM-4RELAY units can be stacked from each of the 4 relays (so a total of 128 channels)
• At least one 4 group relay unit(SPM-4RELAY) is required
• Each channel of the SPM-4RELAY unit supports a maximum of 20 A
• Can be connected via WiFi or Ethernet
• RS-485 communication between the master unit and the SPM-4RELAY devices
• SD card slot for automatic energy history storage (8-32 GB SDHC card supported, not included). Readable via HTTP API.
• LAN mode.

Specification:

• Dimensions: 143 × 90 × 67 mm
• Brand: Sonoff
• "WiFi standard: 2.4GHz, 802.11b, 802.11g, 802.11n
• Power: 100 - 240V, 50 Hz, 60 Hz, AC
• Accessories: Ethernet, LAN, power metering, power monitoring, SD card slot

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