Remote data retrieval from M-Bus devices via the RS485 serial communication line in industry and building automation. The most frequently used M-Bus slave devices are heat, water and electricity consumption meters.

The RS485toMBus-XL converter provides a RS485 to M-Bus interface conversion. There is no change in the content of the messages or communication speed during the conversion. Depending on the converter model the maximum number of M-Bus slave devices that can be connected is 45, 80, 120 or 190.

The M-Bus converter features a processor controlled monitoring of internal state, power supply state and M-Bus line state.
Operation and error states are indicated by status LEDs which simplify and make it easier to troubleshoot possible M-Bus communication errors.

M-Bus port

• Connection of 1 to 45, 80, 120 or 190 M-Bus slave devices depending on converter model.
• Surge protection warranting above standard level of protection against overvoltage.
• Current protection against overload and short circuit on the communication line.
• External voltage protection.
• Processor controlled monitoring of M-Bus line state with LED indication for various error states.
• Indication of M-Bus slave devices reply collision.
• Indication of slave devices presence on the M-Bus line.
• Indication of M-Bus line overload, short and capacitive overload.

Power supply

• Wide range of operating DC power supply voltages 12-30V (20-30V for the XL190 model).
• Over voltage protection.
• Processor controlled monitoring of power supply voltage with indication of its correctness and errors.

RS485

• Signals: Data+, Data- and GND
• Over voltage protections.
• Galvanic separation from power supply and M-Bus line.

Mechanical construction

• Aluminium box with mounting on 35 mm DIN rail.

• 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.