Lenze i750 - Fieldbus Cables, Networks

Fieldbus cables, networks
Please observe the following r
ecommendaons for trouble-free operaon, especially in the
event of Ethernet-based networks.
•
Cables and wiring mus
t meet the specicaons and requirements of the network being
used to allow reliable operaon of the network in typical installaons. In this context, also
observe the recommendaons for acon of the respecve user organizaon.
•
Lay network cables separately from power cables. Maintain as large a distance as possible
to the motor cables which are subject to interference.
•
To avoid compensang currents via the shielding of the network cable, install an
independent, low-resistance equipotenal bonding over the shortest possible distance
parallel to the network cable. This applies in parcular to long cables.
•
Observe bending radii according to manufacturer informaon. Minimum bending radii of
10 x cable diameter or 20 x diameter for frequent manipulaon of the cables are
standard.
•
Fix longer cables 30 cm aer the connecon point.
•
Before leaving the control cabinet, connect the shield of the network cable with the
equipotenal bonding system (e. g. mounng plate) on a large surface.
Patch cable/CAT5 cables:
The appropriate patch cable for the EtherCAT c
onnecon of the axes is included
in the scope of supply.
RJ45 plug c
onnecons:
•
RJ45 plug connecons only funcon properly if they are not subjected to mechanical stress
or lateral forces.
•
For all communicaon modules of the i-series, the connecon of the cable shielding at the
RJ45 sockets is carried out as follows:
•
At the rst RJ45 socket, the shielding is directly connected to funconal earth (FE).
•
At the second RJ45 socket, the shielding is connected to funconal earth (FE) via an RC
element.
This measure prevents potenal equalizaon currents and the resulng interference
eects (see also IEC 61158-2, secon 11.8.7).
Note: High-frequency interference is dissipated via the low-impedance capacitor to
funconal earth (FE), but for low-frequency signals this system has a high loop impedance.
Measuring systems that use low impedance test signals therefore indicate too high
impedance values for the shielding at the second RJ45 socket
Electrical ins
tallaon
EMC-compliant installaon
Fieldbus cables, networks
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