M-Bus Master - KNX gateway

The Ekinex® M-Bus - KNX Gateway performs a protocol conversion between an M-Bus and a KNX TP network. The device acts as M-Bus master. Versions for networks with a maximum number of 20, 40, 80 and 160 connected M-Bus slave devices are available. The device integrates a KNX bus communication module and it is suitable for mounting on a 35 mm DIN rail; it requires an auxiliary power supply.

Technical data

• Power supply: from M-Bus network
• Absorption at 24 Vdc: 3,5 VA (without load);
• 4, 5, 8 or 14 VA (resp. with 20, 40, 80 or 160 M-Bus devices)

Communication

KNX side

• KNX TP (Twisted Pair) communication port electrically isolated from power supply
• Baud rate 9600 baud 
• 1440-byte volatile support “KNX image” memory buffer

M-Bus side

• M-Bus communication port (wired version, two-pole cable)
• Selectable baud rate from 300 to 9600 baud 
• Device addressing from 1 to 250
• Variable reading through M-Bus slave device mapping
• 1440-byte volatile support “M-Bus image” memory buffer

Configuration

Ethernet communication port (IEEE 802.3), RJ45 connector, minimum cable category: 5E

Delivery

The delivery includes the device and terminal blocks to connect to the KNX bus.

Other information

M-Bus (Meter-Bus) is a standard protocol for remote reading of data acquired from thermal energy, electricity, gas and water meters. M-Bus is fully compliant with EN 13757: Communication Systems for remote meter reading, parts 2 (Physical and connection layer) and 3 (Application layer).