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-5 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. The maximum number of M-Bus slave devices that can be connected is five.

M-Bus port

• Connection of 1 to 5 M-Bus slave devices.
• Surge protection guaranteeing superior durability 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 9-34V or AC 8-24V.
• Overvoltage protection and current fuse.
• LED power supply indication.

RS485

• Signals: Data+, Data- and GND
• Protections against overvoltage.
• Selectable termination of the line with a 120R resitor.
• Galvanic separation from the power supply and also the M-Bus line.

Mechanical construction

• Aluminium box with mounting on 35 mm DIN rail.

• Connection of up to 5 M-Bus slave devices.
• More powerful overvoltage protections on the M-Bus line and the power port.
• DC and AC power supply.
• Power port protected by a current PTC fuse.
• More powerful M-Bus line driver with more efficient filters. The length of the M-Bus line can be more then 1km.
• The power port also has a galvanic separation from the RS485 communication port.
• Higher operating temperature range.
• More robust mechanical construction.

• 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.