Basic Documentation

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Siemens M-bus level converter and M-bus web server A6V11157985_en--_f
Smart Infrastructure 2021-06-21
5 Installation
Connections between devices are based on the selected operating mode as
illustrated in the sections below.
Do not connect power to the devices prior to installation!
5.1 Connecting multiple level converters
(WTV531.., WTX631..)
To extend the M-bus, connect terminals (6) and (7) on the existing level converter
(master) to terminals (1) and (2) on the additional level converter (slave).
Additional level converters are connected via slave terminals (1) and (2) with the
same terminals on the previous level converter.
1 Level converter as master
2 Level converter as slave for additional M-bus devices
3 Level converter as slave for additional M-bus devices
5.2 Connect web server and level converter
Terminals (1) and (2) on the level converter are connected to line M1M2 on the M-
bus web server. In addition, a maximum of 20 M-bus devices can be connected
directly to terminals M1 and M2.
To connect the level converter to the M-bus web server online ABC, terminals A (3),
B (4), and C (5) on the level converter are connected to terminals A (1), B (2), C (3)
on the M-bus web server. M-bus devices cannot be connected directly to terminals
A, B, C.
1 Web server as master for 20 devices
2 Level converter as slave for additional M-bus devices
Prerequisite
Important