Requirements On The 24V Power Supply Unit; Installing The 24V Supply - Bosch Rexroth IndraDrive CsDrive System with HCS01 Project Planning Manual

DOK-INDRV*-HCS01******-PR05-EN-P
Rexroth IndraDrive CsDrive Systems with HCS01
Required continuous power
Required peak current
Notes on installation

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
● 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
The continuous power of the 24 V power supply unit has to be greater than
the sum of the power consumptions P
To select the 24 V power supply unit, determine the continuous current I
all components:
I = P / U
N3 N3 N3
(P : power consumption of all components)
N3
The calculated current I
N3
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.
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 = 1.2 × P
PeakCurrent_PowerSupplyUnit
(P : power consumption of all components)
N3
The power supply unit has to provide the calculated peak current I
for at least one second.
rent_PowerSupplyUnit

Installing the 24V supply

● 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.
Protective Extra Low Voltage
2)
Bosch Rexroth AG
Combining the individual components
or 30 V
peak
of the components being supplied.
N3
corresponds to the continuous current of the 24 V
/ U
N3 N3
73/341
ac
of
N3
PeakCur‐