D1205 EDC-MBus
The ZENNER D1205 EDC-MBus is an electronic data concentrator that reads many M-Bus meters from a single point. It polls a large number of ZENNER M-Bus meters (water, heat, electricity) on a schedule, stores the readings in internal memory and forwards them to upstream systems such as SCADA, BMS or Argus EMS. At dense metering points it is used instead of, or in addition to, an M-Bus TCP gateway.
| Max. Meter Capacity | 60 M-Bus devices (primary M-Bus) |
| Supported Media | Water · Heat · Cooling · Gas · Electricity (M-Bus) |
| Reading Interval | Programmable: 15 min – 24 h |
| Internal Storage | Monthly + daily historical index |
| Protocol (upstream) | M-Bus TCP / RS485 Modbus RTU (model-dependent) |
| M-Bus Interface | EN 13757-2 master — 60 slave |
| Upstream Connection | Via an M-Bus TCP gateway (Argus EMS compatible) |
| Power | 230 V AC mains + battery backup |
| Mounting | DIN rail or wall |
| Protection Class | IP20 (indoor panel) |
| Operating Temperature | −10 – +55 °C |
| Standards | EN 13757-2, EN 13757-3 |
Integration with Argus EMS
The D1205 EDC-MBus connects to Argus EMS over M-Bus (EN 13757) two-wire meter loop, and because a ready register template ships with the platform you do not have to work out a point map on site. The field agent polls the device every 60 seconds by default, writes the reading into a local queue first and then forwards it to the server over MQTT/TLS; nothing is deleted before the server acknowledges it. Hourly and daily summaries are derived from these raw readings, and the consumption and cost screens are fed from the same series.
| Protocol | M-Bus (EN 13757) two-wire meter loop |
| Connection path | The M-Bus loop is read through an M-Bus TCP gateway |
| Default polling period | 60 seconds (field agent) |
| Points in the ready template | 6 registers |
| Consumption calculation | Difference of the m³ index over the period |
| Data assurance | Local queue plus server acknowledgement; nothing is deleted before it is confirmed |
When Is This Model the Right Choice?
It is not a meter in itself; it collects the M-Bus meters on a loop and serves them from a single point. In buildings with a high meter count it is used to split the loop and shorten the polling round.
The M-Bus loop is two-wire and meters connect in parallel on the same pair, so no dedicated cable is pulled per meter. Loop length, conductor cross-section and the number of meters on the loop are assessed together, because an M-Bus gateway can only drive a limited load. Meter addresses (primary/secondary) are verified one by one during commissioning.