M-Bus Master - KNX gateway

Code: EK-BM1-TP-20 / 40 / 80 / 160

Description

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 is suitable for mounting on a 35 mm DIN rail; it requires an auxiliary power supply.

The device manages a two-way data stream: the M-Bus registers can be cyclically read and their value sent as a communication object over the KNX TP network through a multicast communication to configured group addresses. The data update over the KNX network can be done cyclically and/or on event of change of the data acquired by the M-Bus network.

Likewise, the Ekinex gateway can make requests to cyclically read KNX communication objects or acquire their values during data exchange over the bus. Cyclically or on event of change of the communication objects, data are written to the M-Bus registers of one or more configured devices.

Available Gateway Models

EK-BM1-TP-20

Supports up to 20 M-Bus slave devices

EK-BM1-TP-40

Supports up to 40 M-Bus slave devices

EK-BM1-TP-80

Supports up to 80 M-Bus slave devices

EK-BM1-TP-160

Supports up to 160 M-Bus slave devices

M-Bus Standard Compliance

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).

Technical Data

Power Supply and Consumption

Power Supply8..24 Vac or 12..35 Vdc auxiliary supply

Absorption at 24 Vdc (No Load)3.5 VA

Absorption with Load4 VA (20 dev.), 5 VA (40 dev.), 8 VA (80 dev.), 14 VA (160 dev.)

KNX Communication Parameters

KNX PortKNX TP (Twisted Pair), electrically isolated from power supply

Baud Rate9600 baud

Buffer Memory1440-byte volatile support 'KNX image' memory buffer

Communication Objects1-bit, 1-byte, 2-byte and 4-byte objects (including DPT 9.xxx float conversion)

M-Bus Communication Parameters

M-Bus PortWired version, two-pole terminal connection

Baud RateSelectable from 300 to 38400 baud

Device AddressingAddressing from 1 to 250

Buffer Memory1440-byte volatile support 'M-Bus image' memory buffer

Design and Physical Characteristics

Housing MaterialPlastic casing

Modular Width4 modular units (4 UM = 72 mm)

Mounting35 mm DIN rail (EN 60715)

Device Weight145 g

Protection DegreeIP20 (installed device)

Delivery

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

Functions and Features

Bidirectional protocol conversion between M-Bus slave devices and KNX TP installation bus

Available in models supporting 20, 40, 80 or 160 connected M-Bus devices

Seamless integration of heat meters, energy meters, gas and water consumption data

Internal conversion routines for 16-bit floating point DPT 9.xxx from integer M-Bus registers

Cyclic or change-of-value triggered data transmission onto the KNX bus

Dedicated PC software CGEKBM1TP for intuitive commissioning over Ethernet

Configuration and Commissioning

Configuration and commissioning require the dedicated PC application software CGEKBM1TP communicating with the gateway via its integrated Ethernet port.