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5.3
Voltage supply
The drive controller requires two voltage supplies on X2 for the operation:
the control voltage (24 V DC) for the supply of the internal processors as well as of
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the digital outputs, and − if available − the holding brake.
the supply voltage of the power unit with 24 V or 48 V DC
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Both voltages have the same reference potential in the drive controller. They are not
isolated. The connections for the control voltage and the supply voltage of the power unit
are equipped with polarity protection and are additionally secured by means of a fuse or
by a polyswitch in the drive.
)
Note!
In principle, it is recommended to use 2 separate DC power supply units for the
control voltage (24 V DC) and the supply voltage (24 V DC ... 48 V DC). If the
power unit is also operated with 24 V DC, you can use a common 24 V DC
power supply unit under the following conditions:
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GHB 13.0001−EN EN 3.0
efesotomasyon.com - Lenze
The 24 V DC power supply unit has to be highly dynamic and robust and has
to provide the required current without voltage dip even with regard to
quick changes in current (e. g. 30 A within 0.5 ms). In this respect, also the
behaviour of further loads integrated in the DC supply system has to be
taken into consideration (e. g. a further drive controller). Furthermore, the
power supply unit has to be sufficiently dimensioned with regard to the
maximum current.
With regard to longer DC supply cables, a backup capacitor has to be
switched between UL and GND, in order to stabilise the supply voltage. You
can easily check the stability of the supply voltage by means of the
oscilloscope integrated in the parameterisation software.
l
Electrical installation
Voltage supply
5
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