About this product 19/76
CytroPac, RE 51055-B/02.2021,
Bosch Rexroth AG
5 About this product
5.1 Performance description
The CytroPac is a compact drive system (smaller tank, cooling system) for hydraulic
machines and particularly machine tools and assembly lines with limited installation
space conditions.
The CytroPac is particularly quiet due to plastic enclosure of all noise sources.
The frequency converter of the variable-speed pump drive ensures dynamic
adjustment of the power/speed and thus of the flow to current requirements to
reduce the operating costs.
In the "Basic" configuration, the fill level, temperature and filter clogging sensors
must be wired by the customer and evaluated via the customer-side machine control.
In the "Advanced" configuration, the frequency converter serves as sensor node and
bundles all measured values of fill level, temperature and filter clogging sensors and
forwards these values via a mating connector to the customer-side machine control.
The status of the hydraulic power unit is also indicated via the integrated LED strip.
Information on the meaning of the LED signals can be found in chapter 10.3
“Warning devices“ on page52 .
In the "Premium" configuration, the frequency converter serves as sensor node and
bundles all measured values of fill level, temperature and filter clogging sensors and
forwards these values via a multi-Ethernet interface, e.g. Sercos or PROFINET, to
the machine control. This ensures reading of all parameters required for condition
monitoring. The CytroPac can be easily integrated in Industry 4.0 applications. The
status of the hydraulic power unit is also indicated via the integrated LED strip.
Information on the meaning of the LED signals can be found in chapter 10.3
“Warning devices“ on page 52.
For an overview of components of the various configurations, refer to data sheet
51055, section “Sensor and interface selection", see chapter 1.2 "Required and
supplementary documentation".
In the "Premium" configuration, the pressure command value can be changed via the
higher-level machine control system during runtime. The new settings are
automatically and independently implemented by the hydraulic power unit via the
frequency converter.
In the "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)
Fields of application
Low noise level
Cost-effective operation
Various extension stages
Parameter adjustment
during runtime
Space-saving installation
