Plant installation
4.7 Rail grounding (PE rail)
Power Line Booster
Operating Instructions, 11/2019, A5E36203125A-AG
53
Note
Missing PE rail
If the installation of a PE rail is not possible next to the powerline communication rails (e.g.
plant modifications), the installation of shield plates may be considered in case of a reduced
number of devices. Please contact Technical Support (
) for more information.
Rail quality
An electrical connection (contact resistance across the entire distance < 1 Ohm) of the
sliding contacts is required to ensure the function of the Power Line Booster.
4.7
Rail grounding (PE rail)
You must set up the powerline communication rails Rail A and Rail B as described in this
manual. You need to pay particular attention to ensure that the powerline rails are always
separated from the other rails by PE rails.
In addition, you must plan the system so that the PE rail is regularly grounded with low
impedance at each connecting piece (about every 6 meters), as well as at the rail ends (e.g.
at the segment end, at the segment change or at switches) on the carrier rail or over the
steel construction with a short cable (<= 10 cm).
Note that a ground cable that is too long will be ineffective for the high-frequency powerline
signal, and the PE rail will act as an antenna in this case.
Strict adherence to the grounding concept described below is essential for stable PROFINET
communication.
Note
You must ground the PE rail at regular distances, as well as at the rail start and the rail end,
with short cables (≤
10 cm) over the carrier rail.
Summary of Contents for SIMATIC Power Line Booster
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