Modbus RI-D35-100 Electricity Meter

Finally getting around to installing my heatpump monitor.

The Kit comes with a SDM120

The current meter I have is a Rayleigh RI-D35. Which appears to provide RS485 and 2 types of pulse output.

Just wondering if it is possible to to this meter ? (no idea how to wire it in as it provides 6 termainls as opposed to 3 like the 120.

Not a bit issue, I can just install the 120 if needed.


Difficult to tell, but it does say there is a Modbus version, so it should be possible to read that.


Actually, this is pretty clear.


Right I’ll see if I can workout the pin outs.

Got the sd120 in for now.


It’s pins 4and 5, both readers are available from the shop mbus and modbus.

1 Like

The Rayleigh RI-D35 Modbus meter is now supported by Emonhub

Example config:

    Type = EmonHubMinimalModbusInterfacer
        device = /dev/ttyUSB0
        baud = 9600
        pubchannels = ToEmonCMS,
        read_interval = 10
        nodename = electricity
        # prefix = sdm_
                address = 1
                registers = 3,5,15,19,23,21,27
                names = EI,EE,P,VA,I,V,FR,PF
                precision = 1,1,1,2,2,1,2
                scales = 1,1,1000,1,1,1,1