The M-bus IoT gateway reads out devices connected directly to the gateway, devices connected to the gateway via level converters as well as wireless devices or network nodes connected to the gateway via RF converters (WTX660-E05060).

The M-bus IoT gateway can be used:

  • Alone with up to 20 directly connected, wired M-bus devices.
  • As master on a M-bus network with up to six parallel connected level converters per line. Up to 250 M-bus devices (max. 250 M-bus meters, max. 250 RVD controllers) can be connected per line.
  • As a master on an M-bus wireless network with up to 23 RF converters, each with up to 500 wireless devices.
  • As master on a network consisting of WTX.. / WTT.. Network nodes with up to 500 RF wireless devices per network. Up to 5 networks can be read in parallel per master.

The M-bus IoT gateway can read out up to 2,500 wireless devices and up to 500 wired devices. It records the data from the connected devices, can evaluate the data, and sends email notifications on events and alarms.

The device storage can save data for a period of up to 10 years. (over the past six months: Saving as per setting; period as of six months: One value per data point per month).

A PC/Internet browser reads the data and log files either locally over Ethernet or from anywhere over the Internet. In addition, the report files can be periodically transmitted with device data to an email recipient or to an FTP server.

An email can be sent on events and alarms.

The M-bus IoT gateway can be integrated in the Synco IC-Cloud. This permits the periodic upload of invoicing and trend data as well as alarm messages to the cloud per customized settings as well as distributing the information to the corresponding customers via email.

The M-bus IoT gateway has three digital inputs and two digital outputs. The change of state to inputs or outputs are recorded in the event log and/or per email depending on the configuration. Both outputs can be manually switched via web operation.

The M-bus IoT gateway is protected against short circuits and surges.

Readout district heating controller / heat meter

District heating controllers as well as heat meters at the district heating substations can be read over M-bus IoT gateway. The data points for the controllers are read/write.

The restore function (backup) can restore earlier controller settings at a later date. In addition, the controller settings can be transferred to a second controller of the same type (on the same application).

We recommend connected the controllers on the one line and the meters on the other for the M-bus IoT gateway since district heating controllers send more data traffic than meters. As a result, the battery power for the meters is not unnecessarily drained when reading the controllers.

When connecting controllers and meters on the same line, operate the devices without batteries (AC/DC 24 V, AC 230 V).

Readout via WLAN

To simplify on-site readout, the M-bus IoT gateway can also be readout using a mobile phone or tablet via WLAN and the readout data can be downloaded to the mobile device.

Web access

The M-bus IoT gateway has a remote access service to simplify web access.

Web access requires only one Internet connection, connected to the M-bus IoT gateway with an Ethernet cable. The M-bus IoT gateway can be comfortably operated remotely after checking the network settings on the IoT gateway; the router and web server must be on the same network.

The web access URL consists of

Example: https://www.wtv676.siemens-info.com/ev0000001

Read network nodes

The M-bus IoT gateway reads devices from a WT.. mesh network. Up to 5 networks can be read in parallel by M-bus IoT gateway. Up to 12 network nodes form a network. One WT.. network node per network must be connected to M-bus IoT gateway via a physical M-Bus line. Each network node has access to all consumption data on its own network.

ACT HOME mobile app

With the ACT HOME mobile app, customers can log in directly to the M-bus IoT gateway using their mobile phone and view current consumption values.

M-bus IoT gateway integration in third-party systems, applications or software via REST API

With the REST API interface, data can be read directly from the M-bus IoT gateway and further processed. A connection to third-party systems, applications or software is also possible. For further information, please contact your Siemens representative.