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5 Installation
5.2.2
System with decentralized module assignment
Example: Modules on multiple DIN rails
A router module (A) is required for the construction of a decentralized measuring, control, and
automation system. This is the case, for example, if not all modules fit on a DIN rail, or if mod-
ules must be mounted at a distance of more than 100 m from the central processing unit or an
upstream router module.
Cover
Once all modules are installed, the cover (B) must be positioned on the DIN rail from the right
and moved to the left against the final module (B1). It protects the contacts of the final module
against touching and contamination.
The strand with the router module is provided with a cover in the same manner.
The cover is included in the scope of delivery of the central processing unit and the router mod-
ule. It therefore does not need to be ordered separately.
End brackets
The final mechanical element of the DIN rail is formed by an end bracket (C) on each side. The
right end bracket is positioned on the DIN rail from the outside, moved to the left against the
cover (C2), and fastened with a screwdriver (C3). The left end bracket is mounted according to
the same principle following the installation of the central processing unit.
The strand with the router module is provided with end brackets in the same manner.
The end brackets are included in the scope of delivery of the central processing unit and the
router module and therefore do not need to be ordered separately.
NOTE!
Therefore, the arrangement of modules on various DIN rails may also be required in order to
differentiate between optional and mandatory modules (see setup program manual
B 705000.6, Section "System bus": Alias device address).
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