EDC B.One
The ZENNER EDC B.One is a compact communication module that brings mechanical water meters with a pulse output onto the M-Bus network. Mounted on the meter, it converts the reed switch pulse signal into the M-Bus EN 13757 protocol, so older mechanical meters can join the Argus EMS infrastructure. Its IP68 rating lets it work safely in wet and buried environments.
| Entry | Reed switch pulse (from the mechanical meter) |
| Output | M-Bus EN 13757-2/-3 |
| Pulse Compatibility | ISO 22158 |
| Application | Mechanical water meter retrofit → M-Bus |
| Protocol | M-Bus EN 13757-2/-3 |
| Connection | Via an M-Bus TCP gateway (Argus EMS compatible) |
| Power | Battery powered |
| Protection Class | IP68 |
| Mounting | Meter-mounted — retrofit |
| Standards | EN 13757, ISO 22158 |
Integration with Argus EMS
The EDC B.One 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.