Requirements on the 24V power supply unit
PELV
2)
for 24V power supply unit
For the 24V supply of the devices of the Rexroth IndraDrive Cs
range, use a power supply unit or a control-power transformer
with protection by PELV according to IEC 60204-1 (section 6.4).
In the scope of CSA/UL, the data of the control-power transformer
are limited to:
● Max. output voltage: 42.4 V
peak
or 30 V
ac
● Max. output power: 10000 VA
The following parameters contain the essential electrical requirements on the
24 V power supply unit:
● Output voltage or output voltage range
● Continuous power which the 24 V power supply unit must supply during
operation
● Peak current which the 24 V power supply unit has to supply when
switching on
Required continuous power
The continuous power of the 24 V power supply unit has to be greater than
the sum of the power consumptions P
N3
of the components being supplied.
To select the 24 V power supply unit, determine the continuous current I
N3
of
all components:
I
N3
= P
N3
/ U
N3
(P
N3
: power consumption of all components)
The calculated current I
N3
corresponds to the continuous current of the 24 V
power supply unit.
The power consumption is indicated as the maximum value of each compo‐
nent and can occur in individual components.
In drive systems with several components, the occurring power consumption
under statistical assumptions will be lower than the calculated one.
Required peak current
When the 24 V control voltage unit is switched on, the 24 V power supply unit
is loaded with the charging current of the capacitors from the connected com‐
ponents. This charging current is electronically limited in the components.
The required peak current of the power supply unit is calculated with:
I
PeakCurrent_PowerSupplyUnit
= 1.2 × P
N3
/ U
N3
(P
N3
: power consumption of all components)
The power supply unit has to provide the calculated peak current I
PeakCur‐
rent_PowerSupplyUnit
for at least one second.
Installing the 24V supply
Notes on installation
● The 24 V supply of the Rexroth IndraDrive Cs drive system components
should in principle be installed in a star layout. This means it is necessa‐
ry to run separate supply lines for each group of drive controllers or
third-party components. This also applies to multiple-line arrangement in
case of supply from, e.g., a supply unit.
2)
Protective Extra Low Voltage
DOK-INDRV*-HCS01******-PR05-EN-P Bosch Rexroth AG 73/341
Rexroth IndraDrive CsDrive Systems with HCS01
Combining the individual components
To Next Page
Loading...
Need help?
General