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
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
Find me (pressing Find Me button on eWeLink app will blink indicator on corresponding SPM-4RELAY unit)
Power consumption history records
Dimensions: 250 × 90 × 67 mm
Power supply: 100 – 240V, 50 Hz, 60 Hz, AC
Maximum current (ampere): Per gang: 20, Total: 80
Extras: OPS, power measurement, power metering, power monitoring