Specifications

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D-5
D Buep 19e-Direct driver
Notes concerning the connection of the PCS to a PLC:
• Connect the cable screening to the central common of the control
cabinet.
• Ensure appropriate chassis groundings with regard to the PCS
housing on the one hand and the PLC bus board on the other.
Remember that a copper grounding strip, due to its large surface,
ensures a considerably higher RF conductivity than normal stranded
interconnecting wire.
• Avoid, as far as possible, high frequency interferences, because
damping is very difficult in this case. The progr. contr. and the PCS
are electrically isolated by optocouplers, but this isolation is not
effective in case of high-speed transients, because optocouplers
feature a coupling capacitance (although it is very low).
• Ensure clear supply voltage reference points. To facilitate this, the
power supply is potential-free.
• If the supply voltage is influenced by high interferences, use a sepa-
rate power supply for the PCS (24 V, 10 VA). It should be equipped
with appropriate noise filters. In this case, 0 Volt can directly be
connected to protective earth at the PCS.
• Ensure a minimum distance of 200 mm between noise sources and
the PCS/the communication cable. This especially concerns inductors
and frequency converters.
• Please take care that the serial data lines are covered completely (if
possible) by the shield. Use a metallized connector hood at PCS as
well as at the progr. contr. side and ensure a highly conductive con-
nection between the connector hood and the shield. Please notice
that grounding on both sides may require an equipotential bonding
conductor with a cross section of 10 times that of the shield. This is
especially important, if the PCS and the PLC are not connected to
the same common point (if they are for example installed in different
control cabinets). This is necessary to prevent equalizing currents
on the cable shield.
Attention!
Check the function of the PCS after parameterization and/or driver in-
stallation. All parameterized functions must be examined. Otherwise
malfunctions of the PCS and/or the programmable controller are possible.