EthMBus-5 LITE

X-Port line

Ethernet to M-Bus communication converter

Basic Ethernet converter.

Designed for remote communication with M-Bus meters using the Ethernet computer network in building or home automation and similar applications. 

The converter works only as a transparent gateway for transfer of M-Bus messages using TCP or UDP Ethernet protocols. Data is available only through M-Bus protocol readout. Data is available only through M-Bus protocol readout.

Main characteristics

M-Bus port
  • Connection of 1 to 5 M-Bus slave devices.
    The most commonly used devices are heat, water, gas and electricity consumption meters.
  • Surge protection warranting above standard level of protection against overvoltage.
  • Current protection against overload and short circuit on the communication line with
    LED status indication.
Power supply
  • Wide range of power supply voltages. DC 9-39.5V or AC 9-27.5V.
  • Overvoltage protection and resettable current fuse.
  • LED power supply indication.
Ethernet
  • TCP, UDP protocols and virtual COM port software.
  • 10/100BASE-TX ethernet port, RJ45 connector.
Mechanical construction
  • Aluminium box with mounting on 35 mm DIN rail.

Main software characteristics

Transparent gateway mode:
  • TCP/IP connection in server mode – option for multiple simultaneous connections.
  • TCP/IP connection in client mode.
  • UDP connection in single or multiple clients mode.
Software functions
  • Converter configuration through web interface.
  • TCP and UDP communication in server and client modes.

Main differences from the EthMBus-5 SMART converter

  • No SMART functions for independent readout, processing and export of M-Bus data.
  • Lower power consumption.
  • Support for multiple connections in TCP/IP server mode.
  • Doesn’t provide Telnet interface for configuration.
  • Doesn’t provide logging of Ethernet activity and error states.
  • No options for backup IP addresses for establishing TCP/IP connection.

Guarantee of quality

  • Each converter passes through several functional electrical tests during the production.
    Additionally a communication test is performed after final assembly.
  • EMC certification in an accredited laboratory for industrial environment.
  • Solid design and construction based on many years practical experience.
 
Ethernet communication interface
Communications interface 10BASE-T or 100BASE-TX (auto-sensing)
Communication protocols ARP, UDP, TCP, ICMP, AutoIP, DHCP, HTTP
Connector RJ45
Compatibility Ethernet: Version 2.0/IEEE 802.3
M-Bus Master communication interface
Number of devices that can be connected 1 to 5 SLAVE devices, idle current max. 7.5mA
Baud rate 300 – 9600 bps
Protection – overvoltage protection TVS 1500W
– electronic protection against overloads and short circuit on the communication line
note: converter can withstand sustained short circuit on the communication line
Galvanic separation up to 1kV from power supply, more than 1kV from Ethernet
Connector terminal block with plug-in connector for wires of up to 2.5 mm² cross-section area
Power supply
Recommended range of power supply voltages
DC power supply 9V to 39.5V
AC power supply 9V to 27.5V
Maximum limits of supply voltage – permanent operation at these voltages is not recommended
Minimum power 8.5V DC, 8.5V AC
Maximum power 42.5V DC, 29.5V AC
Protection overvoltage protection TVS 1500W
overcurrent protection with a 0.3A resettable PTC fuse
Power consumption 1.7W to 3W* depending on load and power supply
*short on the M-Bus line
Connector terminal block with plug-in connector for wires of up to 2.5 mm² cross-section area
Status LEDs
Power – green indication of connected supply voltage
Transmit – green indication of data broadcasting on the M-Bus line
Receive – yellow indication of data reception on the M-Bus line
Overload/Short – red indication of M-Bus line overload – flashing (idle current > 8mA)
indication of short on the M-Bus line – turned on (resistance of the line < 500Ω)
Temperature
Operating range 0°C to 60°C
Mechanická konštrukcia
Mechanical design aluminium box
Mounting 35 mm DIN rail (EN 50022 top hat rail)
Dimensions: height x width x length 33 x 57 x 87 mm – without connectors
33 x 57 x 106 mm – with connectors
(M-Bus and Power plug-in connectors in the terminal blocks)
Protection classification IP40
Weight 136g

EMC compatibility of the M-Bus converter has been tested according to the following industrial environment standards.

EMC emission tests
Standard Test Level
EN 55011 Power line – CONDUCTED EMISSIONS 10/150 kHz – 30 MHz Class A
EN 55011 RADIATED EMISSIONS (Electric Field) 30 MHz – 1000 MHz Class A
EMC immunity tests
Standard Test Level
EN 61000-4-2 ELECTROSTATIC DISCHARGE (ESD) – Contact discharge ± 4 kV
EN 61000-4-2 ELECTROSTATIC DISCHARGE (ESD) – Air discharge ± Information sheet
EN 61000-4-3 RADIATED RADIO-FREQUENCY ELECTROMAG. FIELD 80MHz – 1GHz 10 V/m
EN 61000-4-3 RADIATED RADIO-FREQUENCY ELECTROMAG. FIELD 1.4GHz – 2GHz 10 V/m
EN 61000-4-3 RADIATED RADIO-FREQUENCY ELECTROMAG. FIELD 2GHz – 2.7GHz 3 V/m
EN 61000-4-4 ELECTRICAL FAST TRANSIENT/BURST – Power line ± 4 kV
EN 61000-4-4 ELECTRICAL FAST TRANSIENT/BURST – M-Bus line ± 4 kV
EN 61000-4-5 SURGE IMMUNITY – Power line. Common/differential mode. ± 1 kV / ± 1 kV
EN 61000-4-5 SURGE IMMUNITY – M-Bus line. Cable shielding. ± 4 kV
EN 61000-4-5 SURGE IMMUNITY – M-Bus line. Common/differential mode.* ± 4 kV / ± 2 kV
EN 61000-4-6 CONDUCTED DISTURBANCES, INDUCED BY RADIO-FREQUENCY FIELDS 0.15MHz – 80 MHZ. Power line and M-Bus line. 10 V

* test carried out at the request of the manufacturer. The M-Bus port has an increased durability against overvoltage. Carrying out this type of test is not required with the use of shield cable.

End user

Price list for individuals and companies which do not buy converters for resale.

Pricelist

Integrator

Price list for companies which buy converters for the purpose of resale to their custommers as manufacturers or suppliers.

Pricelist (registered business partners)

The price list is available only to registered business partners.
Registration request.

Registration

Leaflet

Name / File
Date
Size
Promotional leaflet
EthMBus5_LITE_flyer_v1_3_EN.pdf
Date:
20.4. 2021
Size:
292 kB

Manuals

Name / File
Date
Size
Manual
EthMBus5_LITE_manual_v1_3_EN.pdf
Date:
20.4. 2021
Size:
1.21 MB
Web Interface manual
Ethernet_LITE_Web_Interface_v1_3_EN.pdf
Date:
4. 5. 2026
Size:
2 MB

Lantronix utilities

Name / File
Application that can be used to create a virtual serial port - USR-VCOM
https://www.pusr.com/support/download/Virtual-COM-Software-USR-VCOM-V5-4-Setup.html

Warning: The USR-VCOM application doesn’t work with SMART converters. Those use a different application to provide this type of functionality.

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Typical application

Typical wiring of the converter with M-Bus devices, power supply and Ethernet network connection to a computer.

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Connectors on the M-Bus side

Connector Type
M-Bus Connector for connecting M-Bus line. SH-02-5.08
Status LEDs Color
Transmit Indication of broadcasting on the M-Bus line. green
Receive Indication of receiving on the M-Bus line. yellow
Overload/Short Indication of overload or short circuit on the M-Bus line. red
– during overload the LED flashes alternately with Receive LED, I > 8mA
– short circuit is indicated with the LED turned on permanently, resistance of the M-Bus line < 500Ω

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Connectors on the Power Supply and Ethernet side

Connectors Type
Power Connector for power supply and earth ground. SH-02-5.08
Ethernet RJ45 Connector for Ethernet. RJ45
Status LEDs Color
Power Indication of correct power supply voltage. green
Link Network connection status. Turned on when network connection is available. green
Rx/Tx Network activity. Turns on only during communication, data transfers. yellow

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Web Interface

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Dimensions

 

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