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Parameter adjustment
during running time
Space-saving installation
Additional functions
In "Premium" configuration, the pressure command value can be changed via the
superior machine control system during the running time. The new settings are
automatically implemented by the hydraulic power unit via the frequency converter.
In "Advanced" and "Premium" configurations, all sensors and the motor in the
hydraulic power unit are wired to the frequency converter. For this reason, only the
following interfaces are required at the hydraulic power unit:
• Interface for feed-in/voltage supply (12X1)
• Interface for enable signal 24 VDC (15X1)
• Hydraulic connection/oil drain
• Connection to the cooling water supply
• Multi-Ethernet interface ("Premium" only, 21X1, 21X2)
Prestart control:
By means of a control signal, the drive unit is already accelerated before hydraulic
actuators are connected. This reduces the collapse of pressure and you can possibly
do without a hydraulic accumulator.
Sleep function:
By means of the integrated pressure monitoring, the hydraulic power unit is
automatically switched off if the command pressure is reached at a current flow
below the set threshold value or respectively switched on if the pressure is
dropping. This increases the energy efficiency and you can, for example, realize an
accumulator charging circuit without additional control signals.
For further information, refer to the Sytronix quick guide. See chapter 1.2
"Required and amending documentation".
5.2 Product description
The CytroPac is a frequency-controlled hydraulic power unit consisting of a
frequency converter, electric motor, hydraulic pump, oil tank, cooling system and
sensor technology. The cooling system consists of the heat exchanger for motor and
frequency converter cooling as well as optional cooling packages for hydraulic fluid
cooling.
The cooling power can be selected by the number of cooling packages in the oil
tank according to data sheet 51055. Refer to chapter 1.2 "Required and amending
documentation".
Thanks to the flow-optimized design of the oil tank, the required hydraulic fluid
volume was reduced to 20 liters. The cooling system integrated in the oil tank
extracts heat energy from the hydraulic fluid and transfers it to the cooling water.
The ring-shaped oil tank includes the motor-pump group and additionally reduces the
operating noise.
The hydraulic power unit serves for controlled or regulated generation of hydraulic
flow and hydraulic pressure.
Product information
CytroPac, RE 51055-B/06.17, Bosch Rexroth AG
21/84
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