Tecomat Foxtrot – system design
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For outdoor distribution, the cables should be laid into metal conduits with good ground connection and
overvoltage protection should be fitted on both ends of the cable (common for TP distribution of
computer networks). In case of a higher interference risk, paralleling, etc., shielded FTP cables are
recommended (STP, see chapter 1.1.5.3) together with active network elements (HUB, switch, etc.) with
the cable shielding connected to the safety grounding (only on one side of the cable!!).
Paralleling with other cables:
It is not permissible to lay the UTP cables close to power lines. If the minimum distance of (0.15 m)
cannot be followed, especially if the distribution is done in bars and plastic conduits, shielding channels
have to be used for computer distribution lines (conduits made from zinc-coated sheet metal). These
conduits have to be well connected within the whole distribution system to be conductive and they have
to be connected with the ground conductor of the power lines. The UTP cables have to be in a sufficient
distance (50 mm) from any part of the low voltage circuits (230 VAC).
1.1.5.5.
Connection examples of ETHERNET networks
Basic connection, ETHERNET network realization
PC-PLC basic connection
E.g. use of a notebook
It is necessary to use the crossed cable, TXN 102 06 (for
connection refer to Figure 1.1.5.2)
Max. 100 m
Connection via HUB (standardly used HUBs or SWITCHes)
Direct cables TXN 102 05 (connection refer to Figure
3.10.3.1)
Direct connection of two 2 PLCs
Crossed cable
Interconnection, use of the HUB modules (or SWITCH modules)
The following diagram illustrates the possibilities of connections system - HUB according to the HUB
female connector used (i.e. normal female connector - downlink, or connecting female connectors used
primarily for the connections of HUBs into a cascade - uplink. Based on the type of connections, either
direct (normal) or crossed cables have to be used. The diagram shows the connections of HUBs using the
uplink female connector on one of the HUBs (than, we use a direct cable), or using of normal female
connectors (downlink) for both HUBs (than, we use a crossed cable).
