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CMeX10 M-Bus Master for 32 meters

CMeX10 is an M-Bus Master which, by providing additional drive strength, extends the number of meters a CMe Series Gateway is able to use. The product is equipped with a unique IR Pass Through feature which enables up to four CMe/CMeX Series devices to communicate via IR, by stacking them side-by side.


Casing material:
Dimensions (w x h x d):
35 x 90 x 65 mm (2 DIN modules)
Protection class:
100 g
Mounted on DIN rail (DIN 50022) 35 mm

Electrical connections

Supply voltage:
Screw terminal. Cable 0.75-2.5 mm², 0.5 Nm tightening torque
M-Bus master port:
Pin terminal. Solid wire 0.6-0.8 Ø mm

Electrical characteristics

Nominal voltage:
100-240 VAC (±10%)
50/60 Hz
Power consumption (max):
<3 W
Power consumption (nom):
<1 W
Installation category:

Environmental specifications

Operating temperature:
-30 °C to +55 °C
Operating humidity:
5 % to 90 %, non-condensing
Operating altitude:
0-2000 m
Pollution degree:
Degree 2
Usage environment:
Indoors, can be extended with IP67 enclosure for outdoor use
Storage temperature:
-40 °C to +85 °C

Temperature sensor, margin of error

Humidity sensor, margin of error

User interface

Green LED:
Red LED:
Yellow LED 1:
M-Bus data transmission from device
Yellow LED 2:
M-Bus data transmission to device


IR, integrated M-Bus Master
M-Bus standard:
EN 13757

Wireless M-Bus

Integrated M-Bus Master

Nominal voltage, master port:
28 VDC
M-Bus baud rate, master port:
300 and 2400 bit/s
M-Bus search modes:
Primary, secondary
Maximum cable length:
1000 m (100 nF/km, maximum 90 ohm)
IR Pass Through:
Yes, with a maximum of four devices stacked side by side
Maximum number of unit loads (hardware limit):
32T/48 mA

Wireless M-Bus Receiver

M-Bus slave interface


Data storage (examples)

Mobile Network

Fixed Network (Ethernet)


All M-Bus meters, ABB meters with IR interface, CMe/CMeX Series


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

Connections and Interfaces


The CMeX10 - M-Bus Master for 32 meters is a connecting component for small M-Bus infrastructures that extends the number of meters a CMe Series Gateway can read. It makes remote meter reading particularly simple, reliable and cost-effective. However, the versatile M-Bus Master can also be used in larger-scale applications by stacking several components side-by-side. This makes it possible to expand the functionality of the existing metering infrastructure and lays the foundations for the straightforward recording and control of energy consumption.

 The CMeX10 - M-Bus Master for 32 meters is a small product that makes a big impact. Because of its compact design, it takes up very little space, is easy to install and reduces the amount of wiring needed. In addition, the CMeX10 - M-Bus Master for 32 meters is fitted with practical LEDs that show the current status of the master using simple colour signals. The model is compatible with classic M-Bus meters, ABB meters with an infrared interface and products from the CMe/CMeX series.

 Within an M-Bus infrastructure, this M-Bus Master supplies power to up to 32 meters/slaves, and processes their data. The impressive features of the CMeX10 - M-Bus Master for 32 meters include its cost savings, easy installation and maintenance and reliability.

 The CMeX10 - M-Bus Master for 32 meters is the ideal solution for connecting a small number of M-Bus slaves or expanding an existing infrastructure. If you have questions about the design, functionality or applications of the M-Bus Master, you can contact the expert team at Elvaco at any time.