Sonoff SPM-4RELAY

The SPM-4RELAY is the relay unit that needs the SPM-MAIN main unit to work.
The SPM devices are great stackable power measurement devices for especially usage in bigger building like malls or at offices.

  • Power measurement (current, power, voltage) and switch to easily build in a fuse box
  • DIN-rail compatible
  • Do not use this device as safety fuse!
  • Stackable up to 32 SPM-4RELAY units of each 4 relays (so 128 channels in total)
  • Requires at least the SPM-MAIN main unit
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The SPM-4RELAY is the relay unit that needs the SPM-MAIN main unit to work.
The SPM devices are great stackable power measurement devices for especially usage in bigger building like malls or at offices.

  • Power measurement (current, power, voltage) and switch to easily build in a fuse box
  • DIN-rail compatible
  • Do not use this device as safety fuse!
  • Stackable up to 32 SPM-4RELAY units of each 4 relays (so 128 channels in total)
  • Requires at least the SPM-MAIN main unit
  • Each channel of the SPM-4Relay unit supports a maximum of 20A
  • RS-485 communication between SPM-MAIN main unit and SPM-4RELAY units
  • Protection types:
    • Overload
  • Supported features:
    • Schedule
    • Timer
    • Loop timer
    • Find me (pressing Find Me button on eWeLink app will blink indicator on corresponding SPM-4RELAY unit)
    • Power consumption history records
  • Supported third parties:
    • Unknown

NotEnoughTech has reviewed the Sonoff SPM: https://notenoughtech.com/home-automation/sonoff-spm/

Dimensions 250 × 90 × 67 mm
Brand

Power supply

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Maximum current (ampere)

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Gangs

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Manufacturer

Manufacturer: ITEAD

Website: https://itead.cc

Product webpage: https://itead.cc/product/sonoff-smart-stackable-power-meter/

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Manual

Device manual: https://sonoff.tech/product-document/diy-smart-switch-doc/spm-main-spm-4relay-doc/

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