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As a wireless M-Bus receiver, the CMeX50 receives and processes signals from up to 800 wireless M-Bus meters in a secure and encrypted manner. Thanks to the wireless technology, the CMeX50 works reliably and can be easily connected to other CMe/CMeX products from Elvaco using the IR interface.

CMeX50 Wireless M-Bus Receiver

CMeX50 is a Wireless M-Bus Receiver which enables a Gateway from Elvaco's CMe Series to communicate with Wireless M-Bus meters. CMeX50 handles up to 800 Wireless M-Bus meters and guarantees safe data transmissions through individual encryption keys. The product is equipped with an IR interface which makes it easy to connect to other CMe/CMeX products without having to use any cables.

With its durable housing made of robust polyamide, the wireless M-Bus receiver is safe from external influences. Thanks to its compact size and low weight, it is also easy and simple to install. The user interface is an LCD display, which provides information about the current status of the CMeX50. The graphics are clearly laid out and the keyboard is equipped with seven illuminated keys that can be used to control the various functions of the CMeX50. In addition, the model is equipped with various electrical connections, such as an M-Bus master port, M-Bus slave port and a USB slave port.

  • Total: 2
  • Total: 2


Casing material:
Dimensions (w x h x d):
105 x 90 x 65 mm (6 DIN modules)
Protection class:
220 g
Mounted on DIN rail (DIN 50022) 35 mm

Electrical connections

Supply voltage:
Screw terminal. Cable 0.5-2.5 mm², 0.5 Nm tightening torque
M-Bus master port:
Screw terminal cable 0.5-2.5 mm², 0.5 Nm tightening torque
RJ45 8/8
USB slave port:
Type mini B

Electrical characteristics

Nominal voltage:
100-240 VAC (±10%)
50/60 Hz
Power consumption (nom):
<6 W
Installation category:
Unit loads:
1T/1.5 mA

Environmental specifications

Operating temperature:
-30 °C to +55 °C (reduced response time on LCD at low temperatures)
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

LCD diplay:
Graphic monochrome
Display resolution:
128 x 64 pixels
7 illuminated buttons


IR, integrated M-Bus Master, Wireless M-Bus Receiver, M-Bus slave
M-Bus standard:
EN 13757 and EN 13757-4

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)
Maximum number of unit loads (hardware limit):
32T/48 mA

Wireless M-Bus Receiver

S1, T1, C1
Maximum number of Wireless M-Bus devices:
Radio frequency band:
434 MHz, 868 MHz
Encryption, Wireless M-Bus:
RF sensitivity:
-105 dBm
OMS compliant:

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
Default address:


Data storage (examples)

Mobile Network

Fixed Network (Ethernet)



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

Connections and Interfaces


The CMeX50 is an advanced product of M-Bus technology. In the infrastructure network that is used to measure, collect and process consumption data, the model assumes the role of the M-Bus receiver, which is in constant exchange with the M-Bus meters. Up to 800 wireless M-Bus meters can send data to the powerful wireless M-Bus receiver. This is done entirely without cables thanks to a special radio profile on which Wireless M-Bus technology is based. The useful IR interface also enables the wireless M-Bus receiver to be connected to other CMe/CMeX products. While a robust plastic housing protects the hardware, an LCD display with a resolution of 128x64 pixels, a monochrome color scheme and an illuminated keyboard act as a user interface directly on the device.