User´s Guide Power Rail Booster
Version 12/2005
Copyright
©
Siemens AG 2005 All rights reserved.
6ES7 972-4AA02-0XA0
Page 18 of 49
4.4 Rail
Sections
Two types of rail section (Fig.: 9 and 10) can be used. A double rail section can
maintain communication even during a segment change through suitable switching of
the PRB segments by an PRB Segment Controller.
Fig. 9: Example of a double rail section
The isolating rail section is the cost-optimized solution for a segment change. Here,
the contact rails in the two segments are separated by a non-conductive section. In
this case, the plant controller and the vehicle cannot communicate during the
transition.
Fig. 10: Example of an isolating rail section
The isolating rail section can be created by isolating the contact rail with a suitable
isolator. In addition to isolating properties, it is also necessary to take into account
mechanical properties, particularly those relating to abrasion.
Another way of creating an isolating rail section is to use an isolator instead of a
conductor as contact rail.
U
Note
When installing rail sections, care must be taken when aligning the
junctions in order to avoid bounce.
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