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CMi1020 - Integrated MCM for Landis+Gyr E350

CMi1020 is an integrated meter connectivity module which is mounted in a Landis+Gyr E350 electricity meter to collect meter data and deliver it to a receiving system by M-Bus. It also controls up to four rate inputs. CMi1020 is an ideal choice for meter room solutions where meters are grouped together or for property owners who need to map the electric consumption in their apartments.
  • Total: 2
  • Total: 2


Casing material:
Dimensions (w x h x d):
166 x 92 x 35 mm
Protection class:
108 g
In Landis+Gyr E350

Electrical connections

Supply voltage:
From M-Bus
M-Bus master port:
Screw terminal. Cable 0.25-1.5 mm², 0.5 Nm tightening torque
M-Bus slave port:
Screw terminal. Cable 0.25-1.5 mm², 0.5 Nm tightening torque

Electrical characteristics

Nominal voltage:
21-42 VDC through M-Bus connection, independent of wiring polarity
Installation category:
CAT 4, CAT 3 for rate inputs
Rate input low voltage:
<24 VAC
Rate input high voltage:
>24 VAC
Rate input max voltage:
230 VAC
Rate input minimum detection time:
5 s
Unit loads:
1T/1.5 mA

Environmental specifications

Operating temperature:
-20 °C to +55 °C
Operating humidity:
5 % to 90 %, non-condensing
Operating altitude:
0-2000 m
Pollution degree:
Degree 2
Usage environment:
Storage temperature:
-40 °C to +70 °C

Temperature sensor, margin of error

Humidity sensor, margin of error

User interface

Green LED:
Communication with meter
Red LED:
Push button:
Breaker functionality


M-Bus slave
M-Bus standard:
EN 13757

Wireless M-Bus

Integrated M-Bus Master

Wireless M-Bus Receiver

M-Bus slave interface

M-Bus baud rate, slave port:
300 and 2400 bit/s
Nominal voltage, slave port:
21-42 VDC
Addressing modes:
Primary, secondary
M-Bus information:
All OBIS fields from meter


Data storage (examples)

Mobile Network

Fixed Network (Ethernet)


Number of connected meters:


EN 61000-6-2, EN 61000-6-3
EN 61010-1, CAT 4

Connections and Interfaces


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