Electromagnetic Compatibility (Emc) - Duerkopp Adler DACeco M-TYPE Operating Manua

5.3

Electromagnetic compatibility (EMC)

The DAC is prepared for installing in or attaching to sewing units and sewing equipment and meets the
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relevant EMC regulations required for this (EN 60204-31, IEC 60204-31) with a cable length of up to 500 mm on
each input or output socket. From experience, this is sufficient for sewing units. With sewing equipment, further
measures may be necessary because of longer cables, bad cabling, strong adjacent interference fields etc. The
effect of interference can be reduced or eliminated by doing the following:
-Via suitable filters, delay units, suitable cables and cable runs.
-Run cables of different electrical circuits (mains voltage, low voltage) physically separate from each other
in order to keep interference low.
-Reference potential wires for the electrical circuits or joint connection point: star-shaped wiring with one
or more reference points that are earthed with large cross-section insulated wires
-Electrically conductive parts of the sewing unit or sewing equipment must be connected to the protective
earth on the DAC
extra-fine stranded wires with a cross section of at least 2.5 mm
connecting the potential equaliser, make sure of secure contact, i.e. on painted parts. the connection
must be made using toothed washers.
The following parts must be included in the potential equalisation:
-Sewing machine
-Sewing machine support frame
-Pedal
-Magnet or magnetic valve housings
-Holder for buttons
-Support frames for stackers, tape feed etc.
-Earth connections
Earth connections must be run from each part of the equipment to a common point. Braided, large cross-
section wires must be used between moving parts and the housing and the earth connection must be kept as
short as possible.
-Signal transfer
Make sure that no interference voltage is transferred from the control and main current cables to signal cables
by using electrostatic and magnetic shielding, twisted wires and the cable run. (A cable crossover at right
angles is better than one with a smaller angle. Parallel runs must definitely be avoided.)
-Separating equipment parts
Equipment parts susceptible to interference (components with pulse processing and/or with low levels) should
be separated and/or shielded from switch equipment such as electromagnetic relays, thyristors etc.
-In spite of the fact that it is not susceptible to interference, the DAC
immediate vicinity of HF welding machines or similar equipment in order to avoid malfunctions. Should
problems occur, please contact the manufacturer.
© 2013 Dürkopp Adler AG
housing via voltage equalising cables. (Cables suitable for high frequency:
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2
or wide copper bands.) When
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13
Assembly instructions
must not be operated in the
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