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Ex p Control unit
APEX
py
EMC-compliant connection
Cables and connections
Rev. 0
The manufacturer (EMC-compliant design of a system) and the
user (interference-resistant construction of a complete system)
must ensure the electromagnetic compatibility of a complete
system in accordance with the EMC Directive.
BARTEC Ex p control units can only operate safely and trouble free with an EMC-
compliant wiring. This chapter supports you in the EMC-compliant design of your
system.
During operation of an electronic or electrical device, interactions occur with
other neighbouring devices. The neighbouring devices act as a source of
interference, affecting the other device as a susceptible device.
BARTEC Ex p control units are considered to be electromagnetically compatible
and have been developed in compliance with the applicable EMC standards and
limits.
A large part of the safe operation of the Ex p control unit under EMC influences is
ensured by professional, clean line connections.
Please observe the following points:
Divide the cables into groups.
Power cables (power lines, power supply)
Signal cables, shielded, min 0.5 mm²
Data cables, shielded.
Ensure that the wiring is correct. Ensure that over couplings between
signal/data cables and power cables is avoided.
Signal cables and power cables may only cross at right angles.
Route signal and data cables as closely as possible to ground surfaces.
Unused wires in signal and data cables should be short-circuited and
earthed (additional shielding effect).
Where possible, lay signal cables only on one level in the device and insert
them only from one side into the device.
Avoid the formation of current loops.
Ensure that unshielded cables within a circuit (outgoing and return
conductors) are twisted in pairs as far as possible.
Where possible, lay short cables. This avoids coupling capacities and
inductances.
Do not lay cables and wires freely in the device but run them as tightly as
possible along the enclosure wall or earthed mounting surfaces.
Use ferrite cores for the inserted cables.
01-37A2-7D0006_py_Manual_Exp-Control-Unit_20210923_a_en.docx
The individual conductors must be looped through the
ferrite core here.
Electrical connections
Page 39 of 96
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