WebLog120 · Hardware User Manual Version 1.0 - 12/2022
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WebLog120
3.4 Repeater Interface
The WebLog120 can be used as a so-called repeater for network expansion for existing M-Bus systems if the
maximum number of meters or the maximum cable length for the installation has been exceeded. Up to 120
end devices and up to 4 km of cable (JYSTY 1 x 2 x 0.8) can be connected to the device at a transmission
speed of 2400 baud. The repeater input also enables a second M-Bus master to access the meters connected
to the WebLog120.
The M-Bus line of the existing master or level converter is connected to the terminals marked M-Bus Repeater.
As standardized for M-Bus slaves, the polarity is arbitrary. A processed signal for connecting an M-Bus net-
work is then available at the M-Bus output of the WebLog120. This M-Bus network can then be read out by
the WebLog120 and the other master one after the other, but not at the same time.
3.5 USB Interfaces
The WebLog120 provides two USB host interfaces as USB 2.0 type A sockets on the front of the housing.
These interfaces, labeled USB 1 and USB 2, are used, for example, for a USB memory stick as an export
medium or to load firmware updates. A USB WLAN stick can also be permanently inserted here to provide a
WLAN interface (Art. FG eWLAN). Another USB interface is available as a micro-USB socket (USB-OTG)..
3.6 Ethernet Interfaces
The WebLog120 has two 10/100Mbit network ports labelled LAN 1 and LAN 2. LAN 1 is used to permanently
connect the device to a local network or a separate router for DSL or mobile communications. LAN 2 is re-
served for future applications.
