User Manual

Siemens Building Technologies CE1N5366E / 06.11.1998
Landis & Staefa Division 1/4
5
366
M-Bus Repeater WZC-R250
e.g. for plants using the OZW10 as
an M-bus central unit
Repeater for use in M-bus plants where long bus distances need to be covered.
The M-bus repeater is a component of the M-bus system. It is designed for use in plants
where extensive bus lines are required, or where large numbers of meters need to be
connected, for example in district heat networks that supply heat to entire sections of
towns.
For the field of use of the M-bus system, please refer to data sheet 5361.
•
The M-bus repeater operates as a signal amplifier
•
With the help of the M-bus repeater, the plant can be subdivided into several
segments
When ordering, please give type reference WZC-R250.
The delivery is comprised of:
–
M-bus repeater
–
Power pack DC 42 V
The M-bus plant is controlled by the M-bus central unit via an M-bus signal converter.
By using M-bus repeaters (connected in series or parallel), the plant can be subdivided
into M-bus segments. A maximum of 250 M-bus devices can be connected to one M-
bus segment.
The M-bus repeater separates two M-bus segments. The M-bus segment at the input is
controlled by the M-bus signal converter or some other M-bus repeater. At the output,
there is a new M-bus segment available (bus section with M-bus devices).
If the maximum permissible length of the M-bus or the maximum permissible number of
M-bus devices is exceeded, an M-bus repeater is required. It must be installed where
appropriate. The output of the M-bus repeater then delivers the maximum bus voltage
(typically DC 40 V). A maximum of 250 M-bus devices can be connected to it.
Use
Functions
Ordering
Equipment
combinations
Technical design