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As a powerful M-Bus master, the CMex10/11 is an ideal extension to the measurement system infrastructure for remote meter reading. The model thus increases the range and the number of installed measuring devices based on M-Bus technology. The CMeX10/11 - M-Bus master for 32/64 meters provides additional driver strength and thus expands the possibilities for setting up a smart and efficient metering system. The CMeX10/11 - M-Bus Master for 32/64 meters is compatible with Elvaco CMe series gateways. Thanks to a practical IR pass-through function, it is possible to communicate with up to four devices from the CMe/CMeX series.

CMeX10-11 M-Bus Master for 32-64 meters

CMeX10 and CMeX11 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.
  • Total: 2
  • Total: 2


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, 64T/96 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.



The CMeX11 - M-Bus Master for 64 meters is a compact component that plays a central role in a wide variety of metering infrastructures. It can connect up to 64 meters to make remote meter reading easy and uncomplicated. Its practical infrared communication function enables the CMeX11 - M-Bus Master for 64 meters to be connected with up to three additional CMe/CMeX masters in series so that the individual components can communicate with one another. This gives you the capacity to connect additional meters to your M-Bus infrastructure. 

The impressive features of the popular M-Bus Master for 64 meters include its simple installation process and uncomplicated wiring. The model is compatible not only with wired M-Bus meters but also with ABB meters that have an infrared interface and with all the products from the CMe/CMeX range. The practical user interface of the high-quality M-Bus Master uses simple colour signals to communicate the current status of the master, indicate which processes are running and warn the user of errors.

The CMeX11 - M-Bus Master provides a reliable supply of power to the serial bus and allows up to 64 meters to be connected. In addition, the CMeX11 - M-Bus Master for 64 meters processes the data it collects from its slaves and transmits it to the system.

The CMeX11 - M-Bus Master for 64 meters is a classic solution for M-Bus infrastructures and is valued for its reliable, precise and problem-free functionality. This makes it a key component of any metering system based on M-Bus technology. If you are interested in the CMeX11 - M-Bus Master for 64 meters or have any specific questions, please contact the expert team at Elvaco.