Bosch Rexroth CytroPac User manual

Operating instructions
RE 51055-B, Edition: 07.2022, Replaces: 10/2017, EN
Hydraulic power unit
CytroPac

The data specified above only serve to
describe the product. No statements
concerning acertain condition or suitability
for acertain application can be derived
from our information. The information
givendoes not release the user from the
obligation of own judgment and verification.
Itmust beremembered that our products
are subject toanatural process of wear and
aging.
© All rights are reserved to BoschRexrothAG,
also regarding any disposal, exploitation,
reproduction, editing, distribution,
as well as in the event of applications for
industrial property rights.
The cover shows an example configuration.
The product supplied may therefore differ
from the figure shown.
The original operating instructions were
prepared in German.

RE 51055-B, Edition 07.2022, BoschRexrothAG
Contents | CytroPac 3/80
Contents
1 About this documentation ���������������������������������������������������������������������� 5
1.1 Validity of the documentation ....................................................................5
1.2 Required and amending documentation.....................................................5
1.3 Representation of information ...................................................................6
1.3.1 Safety instructions .....................................................................................6
1.3.2 Symbols .....................................................................................................7
1.3.3 Abbreviations .............................................................................................7
2 Safety instructions ��������������������������������������������������������������������������������� 8
2.1 About this chapter......................................................................................8
2.2 Intended use ..............................................................................................8
2.3 Improper use..............................................................................................9
2.4 Qualification of personnel..........................................................................9
2.5 General safety instructions ......................................................................10
2.6 Product- and technology-dependent safety instructions...........................11
2.7 Personal protective equipment.................................................................14
2.8 Obligations of the machine end-user........................................................14
3 General information on damage to property and damage to product ���� 15
4 Scope of delivery���������������������������������������������������������������������������������� 17
5 Product information ����������������������������������������������������������������������������� 18
5.1 Performance description..........................................................................18
5.2 Product description .................................................................................19
5.3 Component overview ...............................................................................20
5.4 Circuit diagram, hydraulic ........................................................................20
5.5 Product identification...............................................................................21
6 Transport and storage��������������������������������������������������������������������������� 22
6.1 Transporting the hydraulic power unit......................................................22
6.1.1 Preparing for transport ............................................................................23
6.1.2 Transport using forklifts and similar floor conveyors................................23
6.1.3 Transport using lifting gear ......................................................................24
6.2 Storing the hydraulic power unit ..............................................................25
7 Assembly���������������������������������������������������������������������������������������������� 26
7.1 Unpacking the hydraulic power unit .........................................................26
7.2 Installing the hydraulic power unit...........................................................26
7.2.1 Dimensions of the hydraulic power unit...................................................27
7.2.2 Fixing the hydraulic power unit in place...................................................27
7.3 Connecting the hydraulic supply ..............................................................31
7.3.1 Connecting the hydraulic supply with the standard version .....................32
7.3.2 Connecting the hydraulic supply in master/slave operation .....................33
7.4 Connecting the water supply....................................................................35
7.5 Overview of the electrical interfaces........................................................36
7.5.1 "Basic" sensor technology version............................................................36
7.5.2 "Premium" and "Premium M12" sensor technology versions ....................36
7.6 Description of the electrical interfaces ....................................................37
7.6.1 General information .................................................................................37
7.6.2 All configurations .....................................................................................37
7.6.3 "Basic" configuration ................................................................................41
7.6.4 "Premium" and "Premium M12" configurations.........................................46

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BoschRexrothAG, Edition 07.2022, RE 51055-B
7.7 Electrical interface connection.................................................................50
7.7.1 "Basic" configuration ................................................................................50
7.7.2 "Premium" and "Premium M12" configurations.........................................51
7.7.3 All configurations .....................................................................................52
8 Commissioning ������������������������������������������������������������������������������������� 53
8.1 First commissioning .................................................................................54
8.1.1 Before commissioning ..............................................................................54
8.1.2 Filling the hydraulic power unit................................................................54
8.2 Re-commissioning after longer standstill .................................................55
9 Operation ��������������������������������������������������������������������������������������������� 56
10 Maintenance and repair ������������������������������������������������������������������������ 57
10.1 Cleaning and care ....................................................................................57
10.2 Inspection ................................................................................................58
10.3 Warning devices .......................................................................................58
10.4 Maintenance schedule..............................................................................59
10.5 Maintenance.............................................................................................59
10.5.1 Checking the electric components/installation ........................................59
10.5.2 Monitoring the filling level........................................................................60
10.5.3 Monitoring the oil temperature ................................................................60
10.5.4 Filter element contamination monitoring (return flow filter) ....................60
10.5.5 Visual inspection of the filling and breathing filter ...................................62
10.5.6 Checking the pressure value ....................................................................62
10.5.7 Hydraulic fluid care ..................................................................................62
10.5.8 Visual inspection for leakage, cracking, force effects and corrosion.........63
10.5.9 Checking the heat exchanger....................................................................63
10.6 Spare and wear parts...............................................................................64
11 Decommissioning ��������������������������������������������������������������������������������� 66
11.1 Preparing for decommissioning................................................................66
11.2 Decommissioning the system ...................................................................66
12 Disassembly and exchange ������������������������������������������������������������������� 67
12.1 Preparing for disassembly........................................................................67
12.2 Disassembly process................................................................................67
13 Disposal ����������������������������������������������������������������������������������������������� 68
13.1 Environmental protection .........................................................................68
14 Extension and modification ������������������������������������������������������������������ 68
15 Troubleshooting ����������������������������������������������������������������������������������� 69
15.1 How to proceed for troubleshooting.........................................................69
15.2 Overview of the impact of defects............................................................70
16 Technical data �������������������������������������������������������������������������������������� 72
17 Appendix ���������������������������������������������������������������������������������������������� 72
17.1 List of addresses......................................................................................72
17.2 Declaration of incorporation ....................................................................73
17.2.1 Annex to the declaration of incorporation ................................................74
17.3 Prohibited substances - REACH, RoHS, WEEE..........................................75
17.4 Additional document for UL listing...........................................................76
18 Alphabetical index ������������������������������������������������������������������������������� 78

RE 51055-B, Edition 07.2022, BoschRexrothAG
About this documentation | CytroPac 5/80
1 About this documentation
1�1 Validity of the documentation
This documentation applies to the following product:
• Hydraulic power unit CytroPac (for material numbers, refer to datasheet51055)
This documentation is intended for assemblers, operators, service engineers and
system end-users and machine and system manufacturers.
This documentation contains important information on the safe and proper
transport, assembly, commissioning, operation, use, maintenance, disassembly
and simple troubleshooting of the hydraulic power unit.
▶ Read this documentation thoroughly, and in particular chapter2
"Safety instructions" and chapter3 "General information on damage to property
and damage to product", before handling the hydraulic power unit.
1�2 Required and amending documentation
▶ Also observe the operating instructions and documentation of the overall
machinery/system.
▶ The hydraulic power unit must not be commissioned until you have been
provided with the documentation marked with the book symbol and
you have understood and observed it.
Table 1: Required and amending documentation
Title Document number Document type
CytroPac hydraulic power unit
Includes technical data, operating conditions, performance limits and
project planning information
51055 Data sheet
CytroPac hydraulic power unit
Contains information on the commissioning of the hydraulic power
unit, such as the installation of IndraWorks DS, the switching
sequence, connection establishment, the IndraWorks DS, CytroPac
and protection functions, as well as diagnosis and troubleshooting.
51055-IB Commissioning
instructions
Hydraulic Fluids Based on Mineral Oils and Related Hydrocarbons
Describes the requirements on hydraulic fluids on mineral oil basis
and related hydrocarbons for operation with Rexroth hydraulic
components and helps you to select ahydraulic fluid for your
hydraulic system
90220 Data sheet
Environmentally compatible hydraulic fluids
Application notes and requirements for Rexroth hydraulic
components.
90221 Data sheet
General product information on hydraulic products
General information on hydraulic products.
07008 Operating instructions
Assembly, commissioning and maintenance of hydraulic systems
General information on assembly, commissioning and maintenance of
hydraulic systems.
07900 Data sheet
External gear pump SILENCE, AZPS
Includes technical data, operating conditions, performance limits and
project planning information
10095 Data sheet

6/80 CytroPac | About this documentation
BoschRexrothAG, Edition 07.2022, RE 51055-B
Sytronix, FcP 5020, frequency-controlled pump drive system
Describes the functions of the frequency-controlled pump drive
system FcP 5020.
R911378635 Quick start guide
Frequency converters series EFC x610 and EFC 3610 / EFC 5610
Describes the assembly, commissioning, use, maintenance,
diagnosis and troubleshooting of the frequency converters.
R911369847 Operating instructions
Frequency converters, multi-Ethernet card
Contains the data, information and descriptions required in
connection with the MEP extension card (Multi-Ethernet Platform).
This extension card is part of the accessories of the fieldbus
communication module of the EFC x610 series frequency converter.
R911378491 Operating instructions
1�3 Representation of information
Uniform safety instructions, symbols, terms and abbreviations are used so that
you can quickly and safely work with your product using this documentation.
For abetter understanding, they are explained in the following sections.
1�3�1 Safety instructions
In this documentation, safety instructions are indicated whenever sequences of
actions are explained which bear the risk of personal injury or damage to property.
The measures described for hazard avoidance must be observed.
Safety instructions are structured as follows:
SIGNAL WORD
Typeand source of danger
Consequences in case of non-compliance
▶ Hazard avoidance measures
▶ <Enumeration>
• Warning sign: Draws attention to the danger
• Signal word: Identifies the degree of danger
• Type and source of danger: Specifies the type and source of danger
• Consequences: Describes the consequences of non-compliance
• Precaution: Specifies how the danger can be prevented
Table 2: Risk classes according to ANSI Z535�6-2006
Warning sign, signal word Meaning
DANGER Indicates adangerous situation which will cause death or
severe injury if not avoided.
WARNING Indicates adangerous situation which may cause death or
severe injury if not avoided.
CAUTION Indicates adangerous situation which may cause minor or
medium personal injury if not avoided.
NOTICE Damage to property: The product or the environment could
be damaged.

RE 51055-B, Edition 07.2022, BoschRexrothAG
About this documentation | CytroPac 7/80
1�3�2 Symbols
The following symbols indicate notes which are not safety-relevant but increase
the comprehensibility of the documentation.
Table 3: Meaning of the symbols
Symbol Meaning
If this information is not observed, the product cannot be optimally used and/or
operated.
▶ Individual, independent action
1�
2�
3�
Numbered instruction:
The numbers indicate that the actions must be carried out one after the other.
1�3�3 Abbreviations
The following abbreviations are used in this documentation:
Table 4: Abbreviations
Abbreviation Meaning
AB Power unit construction
BR BoschRexroth
DBV Pressure relief valve
MEP Multi-Ethernet platform
NG Size
PE Protective Earth
RE Rexroth document in English language
REXXXXXX-B Rexroth operating instructions

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BoschRexrothAG, Edition 07.2022, RE 51055-B
2 Safety instructions
2�1 About this chapter
The hydraulic power unit was designed and manufactured according to the
generally accepted code of practice. However, there is still the danger of personal
injury and damage to property if you do not observe this chapterand the safety
instructions in this documentation.
▶ Read this documentation completely and thoroughly before working with the
hydraulic power unit.
▶ Keep this documentation in alocation where it is accessible to all users at
all times.
▶ Always include the required documentation when you pass the
hydraulic powerunit on to third parties.
Due to the interaction between the hydraulic power unit and the complete
machine, the installation of the hydraulic power unit into the overall
machinery/system will result in additional potential hazards. This applies in
particular to the influence of hydraulic and electric controls on hydraulic drives
generating mechanical movements. It is therefore essential for the manufacturer of
the overall machinery/system to have undertaken an independent risk assessment.
Furthermore, the manufacturer must on this basis have prepared operating
instructions for the overall machine/system.
These operating instructions do not serve as replacement of the operating
instructions of the overall machine/system.
2�2 Intended use
The hydraulic power unit is ahydraulic system component. You may use the
product as follows:
The hydraulic power unit constitutes partly completed machinery in the sense of
the EC Machinery Directive2006/42/EC and is respectively not usable.
The hydraulic power unit is exclusively intended for integration into amachine or
system or for assembly with other components to form amachine or asystem.
The hydraulic power unit may be commissioned only if it has been integrated into
the machine or system for which it is designed and if the machine or system fully
complies with the requirements of the EC Machinery Directive.
The hydraulic power unit serves for controlled or regulated generation of
hydraulic flow and hydraulic pressure.
The hydraulic power unit is not considered to be asafety component in the
sense of the EC Machinery Directive 2006/42/EC.
The hydraulic power unit must not exceed the operating conditions and
performance limits specified in the technical data.

RE 51055-B, Edition 07.2022, BoschRexrothAG
Safety instructions | CytroPac 9/80
The hydraulic power unit is technical equipment exclusively intended for
professional and not for private use.
Intended use includes having read and understood this documentation,
especially chapters2 "Safety instructions" and 3 "General information on damage
to property and damage to product".
2�3 Improper use
Any use deviating from the intended use is improper and thus not admissible.
BoschRexrothAG does not assume any liability for damage caused by improper
use. The user assumes all risks involved with improper use.
The hydraulic power unit is not suitable for operation in explosive environments.
Improper use of the hydraulic power unit includes:
• Non-compliance with the technical data, operating conditions,
performance limits and environmental conditions specified in the datasheet.
• Operation of the hydraulic power unit with hydraulic fluid not complying with the
specifications in the data sheet.
• Use of spare parts that are not approved by the manufacturer.
• Mechanical modification of the hydraulic power unit.
• Welding or soldering works at the hydraulic power unit.
2�4 Qualification of personnel
The activities described in this documentation require basic knowledge of
mechanics, electrics and hydraulics as well as knowledge of the appropriate
technical terms. For transporting and handling the hydraulic power unit,
additional knowledge of how to handle lifting gear and the necessary attachment
devices is required. In order to ensure safe use, these activities may only be
carried out by acorresponding expert or an instructed person under the direction
and supervision of an expert.
Experts are those who can assess the work to be undertaken, recognize potential
hazards and apply the appropriate safety measures due to their professional
training, knowledge and experience, as well as their understanding of the relevant
regulations pertaining to the work to be undertaken. An expert must observe the
relevant specific professional rules and have the necessary hydraulic and electrical
expert knowledge.
BoschRexroth offers measures supporting training in specific fields.
Please find an overview of the training contents online at:
www.boschrexroth.com/de/de/academy.

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BoschRexrothAG, Edition 07.2022, RE 51055-B
2�5 General safety instructions
• Observe the valid regulations on accident prevention and environmental
protection.
• Observe the safety regulations and provisions of the country in which the
product is used/applied.
• Only use Rexroth products in technically perfect condition.
• Observe all notes on the product.
• Persons who assemble, operate, disassemble or maintain Rexroth products
must not consume any alcohol, drugs or pharmaceuticals that may affect their
ability to react.
• Only use accessories and spare parts approved by the manufacturer in order to
exclude hazards to persons due to unsuitable spare parts.
• Comply with the technical data and environmental conditions specified in the
product documentation.
• The installation or use of inappropriate products in safety-relevant applications
could result in unintended operating conditions when being used which in turn
could cause personal injuries and/or damage to property.
Therefore, only use aproduct for safety-relevant applications if this use is
expressly specified and permitted in the documentation of the product, or if
the safe suitability of the product in the application is confirmed by aseparate
conformity assessment procedure for the end product, e.g.in explosion
protection zones or in safety-related parts of control systems (functional safety).
• Do not commission the product until you can be sure that the end product
(for example amachine or system) where the Rexroth product is installed
complies with the country-specific provisions, safety regulations and standards of
the application.
• Only persons who have been authorized by the machine end-user may be granted
access to the direct operating range of the machine/system. This also applies
during any standstill of the machine/system.

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Safety instructions | CytroPac 11/80
2�6 Product- and technology-dependent safety instructions
WARNING
Pressurized hydraulic power unit, pressurized machine/system!
Danger to life and risk of serious injuries when working on non-decommissioned
machines/systems, burns, environmental pollution, damage to property!
▶ Ensure that all relevant components of the hydraulic system are depressurized
and that the electrical control is de-energized. For doing so, observe the
specifications of the machine/system manufacturer and/or end-user.
▶ Do not disconnect line connections, connections or components as long as
the hydraulic system is pressurized.
▶ Make sure that appropriate safety measures are implemented to prevent
any dangerous situations for personnel and real assets if commissioning
or maintenance work requires decommissioning of safeguard like fuses,
pressure relief valves or covers (frequency converter).
▶ Make sure that all safeguards like fuses, pressure relief valves or
covers (frequency converter) of the hydraulic power unit are in place,
properly installed and functional on re-commissioning.
High electrical voltage!
Danger to life and risk of injury caused by electric shock!
▶ Make sure the relevant system part is de-energized when working at the
system.
▶ Secure the system against restarting.
▶ Operate the hydraulic power unit only with apermanently installed protective
grounding conductor.
▶ Observe the discharge time (at least 30minutes) of capacitors.
Leakage of (pressurized) hydraulic fluid and oil mist!
Danger to life! Risk of injury! Explosion hazard! Risk of fire!
Environmental pollution! Damage to property!
▶ Switch the system off immediately (emergency off switch).
▶ Identify and remedy the leakage.
▶ Never try to stop or seal the leakage or the oil jet using acloth.
▶ Avoid direct contact with the leaking hydraulic fluid.
▶ Carry out visual inspections for leak-tightness of the hydraulic power unit and
the oil-containing components on aregular basis.
▶ Wear your personal protective equipment.
▶ Keep open fire and ignition sources away from the hydraulic power unit.
▶ When dealing with hydraulic fluids, you must imperatively observe the
manufacturer’s information.
▶ Make sure that the grounding (electric welding circuit) during welding works
at the system is not lead via the hydraulic power unit.

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BoschRexrothAG, Edition 07.2022, RE 51055-B
WARNING
Unexpected start-up due to malfunctions/incorrect operation!
Danger to life! Risk of injury!
▶ Ensure that the hydraulic power unit is secured against unexpected start-up.
▶ Regularly check the hardware and software.
▶ Make sure that required measures for decommissioning are implemented by
the machine manufacturer as the hydraulic power unit is not equipped with
direct measures (e.g.switches) for decommissioning of the product.
Direct contact with live components in case of fault, e�g�loose terminals,
insulation defects, missing grounding, malfunction of fuses or damaged lines,
components or terminals!
Danger to life! Risk of injury! Danger caused by electric shock or severe injury!
▶ Before any maintenance work, de-energize the relevant system part.
▶ Ensure continuous connection of the protective grounding conductor.
▶ Observe the operating conditions and performance limits specified in the
technical data.
▶ Work at electric equipment may only be performed by specialized electricians.
▶ Comply with the recommended inspection and maintenance intervals.
Overheating of the hydraulic power unit (electric motor, frequency converter,
hydraulic components and central plate) and pressure line!
Danger to life! Risk of injury! Explosion hazard!
▶ De-energize the relevant system part immediately.
▶ Correct the cause of overheating.
▶ Do not use the hydraulic power unit in potentially explosive atmospheres.
Functional restrictions of the hydraulic power unit due to EMC irradiation!
Danger due to uncontrolled machine movements due to electro-magnetic
radiation of unshielded connection lines.
▶ Observe the EMC limit values.
▶ Only use recommended electrical connection lines according to the EMC
Directiveand shield the electronics from the source of interference, if
necessary.
▶ Keep the recommended distance to the source of interference.
▶ Provide for proper, safe PE connection.
Overheating of electric lines and components or short-circuit!
Danger to life! Risk of injury! Risk of fire!
▶ Observe the operating conditions and performance limits and safeguards
specified in the technical data.

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Safety instructions | CytroPac 13/80
CAUTION
Hydraulic power unit has hot surfaces!
Risk of injury! Risk of burning!
▶ Allow the hydraulic power unit to cool down sufficiently before touching it.
▶ Wear heat-resistant gloves or protective clothing. During or after the operation,
temperatures may rise to values higher than 60°C, depending on the
operating conditions.
▶ Observe the protective measures of the machine/system manufacturer and/or
operator.
Leaked hydraulic fluid, oily surfaces!
Risk of injury! Slip hazard!
▶ Protect and mark the danger zone.
▶ Immediately remove hydraulic fluid that has leaked out.
▶ Use an oil binding agent in order to bind the leaked hydraulic fluid.
▶ Remove and dispose of the contaminated oil binding agent,
seechapter13 "Disposal".
▶ Wear the personal protective equipment prescribed for your activity.
▶ Perform aleak test.
Contact with hydraulic fluid!
Health hazard/impairment of health, e.g.eye injuries, skin lesions,
intoxication upon inhalation or due to swallowing, sensitization!
▶ Avoid contact with hydraulic fluids.
▶ When dealing with hydraulic fluids, you must imperatively observe the
safety instructions of the hydraulic fluid manufacturer.
▶ Use your personal protective equipment (like e.g.safety goggles,
protective gloves, suitable working clothes, safety shoes).
▶ If nevertheless hydraulic fluid comes into contact with the eyes or gets into
the bloodstream or is swallowed, please consult adoctor immediately.
Electro-magnetic/magnetic fields!
Health hazard for persons with cardiac pacemakers, metal implants or hearing aids!
▶ Make sure that the personnel specified above is prevented from accessing areas
where drive components are installed and operated or arrange consultation with
adoctor for approval.
Sharp edges!
Risk of injury!
▶ Wear your personal protective equipment.

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CAUTION
Loud noise due to high sound pressure level (in case of malfunction)!
Danger of hearing damage (temporary/permanent), stress/loss of attention!
Fault in voice communication and acoustic signals!
▶ Wear your ear protection.
▶ Consult the machine manufacturer or BoschRexroth to identify any
malfunction if applicable.
2�7 Personal protective equipment
During operation and maintenance work as well as during installation and removal
of the hydraulic power unit, always wear the following personal protective
equipment:
• Heat or cold-resistant protective gloves
• Ear protection
• Safety shoes
• Perfectly fitting safety goggles
• Protective helmet
2�8 Obligations of the machine end-user
In order to ensure safety when handling the hydraulic power unit and its
components, the machine end-user of the system must:
• guarantee the intended use of the hydraulic power unit and its components
according to chapter 2.2 "Intended use".
• instruct the operating personnel regularly in all items of the operating
instructions and make sure that they are observed.
• ensure compliance with the instructions on occupational safety and with the
operating instructions.
• ensure compliance with operating data (admissible operating temperature,
maximum operating pressure).
The machine end-user of the BoschRexroth hydraulic power unit is obliged to
provide personnel training on aregular basis regarding the following subjects:
• Observation and use of the operating instructions and the legal regulations
• Intended operation of the BoschRexroth product
• Observation of the instructions of factory security officers and of the operating
instructions of the machine end-user
• Behavior in case of emergency
The operation of installations, systems and machines basically requires the
implementation of aholistic IT security concept which is state-of-the-art in terms
of technology. Accordingly, BoschRexroth products and their properties have to be
considered as components of installations, systems and machines for their holistic
IT security concept.
Unless otherwise documented, BoschRexroth products are designed for operation
in local, physically and logically secured networks with access restrictions for
authorized persons, and they are not classified according to IEC62443-4-2.

RE 51055-B, Edition 07.2022, BoschRexrothAG
General information on damage to property and damage to product | CytroPac 15/80
3 General information on damage to
property and damage to product
The warranty only applies to the delivered configuration. The claim to warranty
expires if the product is assembled, commissioned and operated incorrectly,
not used as intended and/or handled improperly.
NOTICE
Danger due to improper handling!
Damage to property!
▶ You may only use the hydraulic power unit according to chapter 2.2 "Intended
use".
▶ Do not expose the hydraulic power unit to any mechanical loads under any
circumstances.
▶ Do not place/put any objects on top of the hydraulic power unit.
▶ Never use the hydraulic power unit as ahandle or step.
▶ Do not apply any external loads on the hydraulic power unit.
Unauthorized changes to the frequency converter parameters!
Damage to property!
▶ Only change parameters in accordance with the commissioning instructions
51055-IB, see chapter 1.2 "Required and amending documentation".
▶ Coordinate the any changes of other parameters with the BoschRexroth
customer service.
Operation with insufficient hydraulic fluid!
Damage to property!
▶ When commissioning or re-commissioning the machine/system, the oil tank
as well as the suction and working lines of the hydraulic power unit and
the components must be filled and remain filled with hydraulic fluid during
operation according to manufacturer's specifications.
▶ Observe the machine/system manufacturer's specifications regarding the point
"Control of the hydraulic fluid" and the prescribed remedial measures for the
control result.
Leaking or spilled hydraulic fluid!
Environmental pollution and contamination of the ground water!
▶ Use an oil binding agent in order to bind the leaked hydraulic fluid.
▶ When filling and draining the hydraulic fluid, always put adrip pan under the
hydraulic power unit.
▶ Observe the information in the safety datasheetof the hydraulic fluid and
the machine/system manufacturer's regulations.

16/80 CytroPac | General information on damage to property and damage to product
BoschRexrothAG, Edition 07.2022, RE 51055-B
NOTICE
Mixing hydraulic fluids!
Damage to property!
▶ Generally avoid any mixing of hydraulic fluids of different manufacturers and/
or of different types of the same manufacturer.
▶ Check the compatibility of the various hydraulic fluids and their compatibility
with the components and seals. Mixing of hydraulic fluids may occur,
for example, due to hydraulic fluid residues in acomponent.
Contamination by fluids and foreign particles!
Early wear and malfunctions!
Take the following measures to protect the hydraulic power unit:
▶ During assembly, provide for cleanliness in order to prevent foreign particles
e.g.welding beads or metal chips from getting into the hydraulic lines and
causing wear or malfunctions in the hydraulic power unit.
▶ Make sure that all connections, hydraulic lines and attachment parts
(e.g.measuring devices) are clean and free of chips.
▶ For removing lubricants or any other contamination, use industrial
residue-free wipes.
▶ Only complete cleaning processes at the hydraulic power unit if the
hydraulic connections are closed.
▶ Before commissioning, ensure that all hydraulic and mechanical connections
have been made.
▶ Ensure that no pollutants are able to penetrate when sealing the measuring
ports.
Improper cleaning!
Damage to property!
▶ Cover all openings with the appropriate protective threads in order to prevent
cleaning agents from penetrating the system.
▶ Check that all seals and electric plug-in connections are firmly fitted to
prevent the penetration of cleaning agents.
▶ Do not use aggressive cleaning agents for cleaning. Clean the hydraulic power
unit using asuitable cleaning liquid.
▶ Do not use ahigh-pressure washer.
▶ Do not use compressed air for the cleaning at functional interfaces.
▶ Make sure that the cover is turned to the "closed position" after cleaning.
See also Fig. 1, left view.
Environmental pollution caused by incorrect disposal!
Environmental pollution! Damage to property!
▶ Dispose of the hydraulic power unit, the hydraulic fluid and the packaging in
accordance with the applicable national regulations in your country.
▶ Dispose of the hydraulic fluid according to the applicable safety datasheetof
the hydraulic fluid.

RE 51055-B, Edition 07.2022, BoschRexrothAG
Scope of delivery | CytroPac 17/80
4 Scope of delivery
Included within the scope of delivery:
• CytroPac hydraulic power unit
• Operating instructions (this document) including EC declaration of incorporation
and additional document for UL listing
For further information on optionally available components, see data sheet
51055, see chapter 1.2 "Required and amending documentation".

18/80 CytroPac | Product information
BoschRexrothAG, Edition 07.2022, RE 51055-B
5 Product information
5�1 Performance description
The CytroPac is a compact drive system (smaller oil tank, cooling system) for
hydraulic machines and particularly machine tools and assembly lines under limited
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 the flow to current requirements to reduce the operating
costs.
In "Basic" configuration, the filling level, temperature and filter contamination
sensors must be wired by the customer for evaluation via the customer-side machine
control system.
In the "Premium" and "Premium M12" configurations, the frequency converter serves
as sensor node and bundles all measured values of filling level, temperature and
filter contamination sensors and forwards these values via amulti-Ethernet interface,
e.g. Sercos or PROFINET, to the machine control system. This ensures reading of
all parameters required for condition monitoring. The CytroPac can thus be easily
integrated in Industry 4.0 applications. The status of the hydraulic power unit is also
indicated via the integrated LED strip.
For information on the meaning of the LED signals,
see chapter 10.3 "Warning devices".
In the "Premium" and "Premium M12" configuration stages, the higher-level machine
control unit can change the pressure command value during the running time.
The new settings are automatically implemented by the hydraulic power unit via the
frequency converter.
In "Premium" and "Premium M12" 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 24 VDC power supply, messages, if necessary enable signal and
starting of functions (15X1)
• Hydraulic connection/oil drain
• Connection to the cooling water supply
• Multi-Ethernet interface ("Premium" and "Premium M12" only, 21X1, 21X2)
Fields of application
Low noise level
Cost-effective operation
Various configurations
Parameter adjustment
during running time
Space-saving installation

RE 51055-B, Edition 07.2022, BoschRexrothAG
Product information | CytroPac 19/80
The product provides the following features relevant to CytroPac:
• Pressure/flow rate setting
– Easy setting of the command value (internal command values and 4
switchable parameters for the pressure command value)
– Command value setting via communication possible
("Premium" and "Premium M12" only)
• p/Q-PID control
– p/Q control with automatic switch-over between pressure and volume
flowcontrol mode
– Flow control
– Pressure control
– Two switchable sets of controller parameters
• Extension functions
– Hydraulic soft start and separate acceleration ramp
– Sleep/wake-up function
– Pressure drop/excessive pressure compensation
– Pump power limitation
– Master/slave control (only "Premium" and "Premium M12" only)
• Protective function
– Actual pressure monitoring
– Limit value for pressure and flow command value
– Oil exchange warning/fault
– Thermal pump monitoring
– CytroPac sensor monitor ("Premium" and "Premium M12" only)
– LED flashing pattern to indicate the converter status
("Premium" and "Premium M12" only)
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.
More functions

20/80 CytroPac | Product information
BoschRexrothAG, Edition 07.2022, RE 51055-B
5�3 Component overview
The CytroPac hydraulic power unit basically consists of the following components:
Fig� 1: Component overview
1 Oil tank with motor-pump group (optional cooling packages)
2 Return flow filter
3 Filler and breathing filters
4 Filter contamination sensors
5 Electrical connections (see Fig. 15)
6 Cover with frequency converter below
7 Filling level and temperature sensor
8 Central plate (integrated heat exchanger)
9 Visual oil level check and hydraulic fluid draining
Hydraulic fluid hose with LED strip behind it for status display (for the
meaning of the LED signals, see chapter 10.3 "Warning devices", only in the
"Premium" and "Premium M12 versions")
10 Clip (for removal of the hydraulic fluid hose for hydraulic fluid draining)
5�4 Circuit diagram, hydraulic
The hydraulic circuit diagram can be found in data sheet 51055,
see chapter 1.2 "Required and amending documentation".