Bosch Rexroth 4WRPEH6 3X User manual

Operating instructions
RE29118-B/09.2021
Replaces: 07.2021
English
Directional control and
proportional directional valves
with IO-Link interface
4WRPEH6_3X
4WRPEH10_3X
4WRPE6_3X
4WRPE10_3X
4WRLE_4X

The data specified serves to describe the
product. If information on the use of the
product is given, it is only to be regarded
as application examples and recommendations.
Catalog information does not constitute
warranted properties. The information
given does not release the user from the
obligation of own judgment and verification.
Our products are subject to anatural process
of wear and aging.
© All rights with BoschRexrothAG, also in
case of applications for industrial property
protection. It may not be reproduced or
given to third parties without consent of
BoschRexrothAG.
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29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
3/44Contents
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 5
2 Safety instructions 7
2.1 General information on this chapter 7
2.2 Intended use 8
2.3 Improper use 8
2.4 Qualification of personnel 8
2.5 General safety instructions 9
2.6 Product-specific safety instructions 11
2.7 Safety equipment 15
2.8 Personal protective equipment 20
2.9 Obligations of the machine end-user 20
3 General information on damage to property and damage to product 21
4 Scope of delivery 22
5 Product information 22
5.1 Product description 22
5.2 Product identification 23
6 Transport and storage 25
6.1 Storing the valve with IO-Link interface 25
7 Assembly 26
7.1 Unpacking 26
7.2 Installation conditions 26
7.3 Required tools 26
7.4 Recommended accessories 26
7.5 Prior to assembly 27
7.6 Place of installation 27
7.7 Assembling the valve with IO-Link interface 27
8 Commissioning 32
8.1 First commissioning 32
9 Operation 33
10 Maintenance and repair 33
10.1 Cleaning and care 34
10.2 Inspection and maintenance 34
10.3 Repair 34
11 Disassembly and replacement 35
11.1 Required tools 35
11.2 Preparing disassembly 35
11.3 Disassembly process 35
11.4 Preparing storage and further use 36
12 Disposal 36
12.1 Environmental protection 36
12.2 Return to BoschRexrothAG 37
12.3 Packaging 37
12.4 Materials used 37

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12.5 Recycling 37
13 Extension and modification 37
14 Troubleshooting 38
14.1 How to proceed for troubleshooting 38
14.2 Fault table 38
15 Technical data 39
16 Appendix 39
16.1 List of addresses 39
17 Index 40

About this documentation 5/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
1 About this documentation
1.1 Validity of the documentation
This documentation applies to the following valves with IO-Link interface:
• 4WRPE(H) (direct actuated directional control valve with IO-Link interface)
• 4WRLE (pilot-operated directional control valve with IO-Link interface)
This documentation is intended for assemblers, operators, service engineers and
system end-users.
This documentation contains important information on the safe and proper assembly,
transport, commissioning, operation, use, maintenance, disassembly and simple
troubleshooting of the product.
 You should read this documentation thoroughly and in particular chapter2
"Safety instructions" and chapter3 "General information on damage to property
and damage to the product" before working with the product.
1.2 Required and amending documentation
 The product must not be commissioned until you have been provided
with the documentation marked with the book symbol and you have
understood and observed it. BoschRexroth datasheets are available online at
www.boschrexroth.com/mediadirectory
Table 1: Required and amending documentation
Title Document
number
Document type
System documentation from the system manufacturer
Directional control valves, direct operated, with electrical position feedback, type 4WRPEH6 29121 Datasheet
Directional control valves, direct operated, with electrical position feedback, type 4WRPEH10 29038 Datasheet
Directional control valves, direct operated, with electrical position feedback, type 4WRPE10 29122 Datasheet
Directional control valves, direct operated, with electrical position feedback, type 4WRPE6 29118 Datasheet
Directional control valves, pilot-operated, with electrical position feedback, type 4WRLE... 29123 Datasheet
Directional control valves with electrical position feedback and IO link interface 29400-PA Parameter description
Declaration of conformity according to EMC Directive 2014/30/EU Available from
BoschRexroth on
request
Reliability characteristics MTTFDregarding the functional safety according to ENISO13849 08012 Datasheet
1.3 Representation of information
Consistent safety instructions, symbols, terms and abbreviations are used in this
documentation so that you can quickly and safely work with the valve described.
For better understanding, they are explained in the following sections.
1.3.1 Safety instructions
In this documentation, safety instructions are included in chapter2.6
"Product-specific safety instructions" and in chapter3 "General information on
damage to property and damage to the product" and whenever sequences of actions

6/44 About this documentation
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
or instructions are explained which bear the risk of personal injury or damage to
property. The described hazard avoidance measures must always 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 Z535.6-2011
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.
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 used and/or
operated optimally.
 Individual, independent action

Safety instructions 7/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
Symbol Meaning
1.
2.
3.
Numbered instruction:
The numbers indicate that the actions must be carried out one after the other.
1.3.3 Designations
The following designations are used in this documentation:
Table 4: Designations
Designation Meaning
IO-Link IO-Link is acommunication system for connection of intelligent sensors and
actuators
RExxxxx Rexroth document in English language
1.3.4 Abbreviations
The following abbreviations are used in this documentation:
Table 5: Abbreviations
Abbreviation Meaning
CCF Common Cause Failure
DCavg Average Diagnostic Coverage according to ENISO13849-1
I/O Input/output
MTTFdMean time to dangerous failure
PC Personal Computer
PELV Protective Extra-Low Voltage
PFH Probability of dangerous failure per hour
PL Performance Level according to ENISO13849-1
SELV Separated extra-low voltage
PLC Programmable Logic Control
2 Safety instructions
2.1 General information on this chapter
The valves with IO-Link interface described below have been manufactured
according to the generally accepted codes of practice. However, there is still the
danger of personal injury and/or 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 product.
 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 valve on to
third parties.

8/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
2.2 Intended use
A valve with IO-Link interface is avalve with electrical control for use in one and
two-channel safety applications of up to cat. 3, PL d according to EN13849-1 as
switch-off element for one channel.
Depending on the application and the requirements of work equipment-related
standards according to EN13849-1, the user must provide appropriate
monitoring/plausibility checks which comply with the required diagnostic
coverageDCavg using ahigher-level control.
The valve is exclusively intended for integration into amachine or system or to be
assembled with other components to form amachine or system. The product may be
commissioned only if it is integrated in the machine/system for which it is designed.
The technical data indicated in the operating conditions and the performance limits
must be observed.
The valve with IO-Link interface may be used as follows:
• To control position, pressure, force, velocity, pressure differential and flow
When using the device, ahigher-level control logic with corresponding I/O
components is required for holistic control of the machine motion sequence and
safety-related monitoring in connection with the valve with IO-Link interface.
The valve may not be used in potentially explosive atmospheres. The product is only
intended for professional use and not for private use.
Intended use includes having read and understood this documentation completely,
especially chapter2 "Safety instructions".
2.3 Improper use
Any use deviating from the intended use is improper and thus not admissible.
Improper use voids any warranty claims. It is also regarded as improper use if the
valve is operated outside the indicated performance limits and operating conditions,
especially the required environmental conditions.
BoschRexrothAG does not assume any liability for damage caused by improper use.
The user assumes responsibility for all risks surrounding improper use.
2.4 Qualification of personnel
The activities described in this documentation require basic knowledge of electric
installation, control technology, programming and hydraulics as well as knowledge
of the appropriate technical terms. 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.

Safety instructions 9/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
Experts are those who can recognize potential dangers and apply the appropriate
safety measures due to their professional training, knowledge and experience,
as well as their understanding of the relevant conditions pertaining to the work to be
undertaken. An expert must observe the relevant specific professional rules and have
the necessary hydraulic expert knowledge.
Hydraulic expert knowledge means, among other things:
• Reading and completely understanding hydraulic schemes,
• In particular, completely understanding the correlations regarding the safety
equipment and
• Having knowledge of the function and set-up of hydraulic components.
BoschRexroth offers training measures in specific fields. An overview over the
training contents can be found online at:
https://www.boschrexroth.com
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.
• Exclusively use Rexroth products in technically perfect condition.
• Observe all notes on the product.
• Persons who assemble, operate, disassemble or maintain Rexroth products must
not be under the influence of alcohol, drugs or pharmaceuticals that may affect
their ability to react.
• Only use original Rexroth accessories and spare parts in order to prevent 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 states 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,
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/system) where the Rexroth products are installed
complies with the country-specific provisions, safety regulations and standards of
the application.
• Please observe the safety-relevant information and risk specifications in the
operating instructions of the manufacturer of the connected hydraulic system
before commissioning the control with ahydraulic system.
• Please observe the general installation and safety instructions when working on
electric systems.

10/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
• The information given in the product documentation with regard to the use of
the supplied components are only application examples and recommendations.
The machine manufacturer and system installer must check the suitability of
the supplied components and the information given in this documentation with
regard to their use self-dependently for his individual application and adjust it to
the safety instructions and standards valid for his application, and carry out the
required measures, changes and amendments.
• Technical data as well as connection and installation conditions are available in the
product documentation and must be imperatively observed.
• In case of faults impairing the safety and changes in the operating behavior,
shut down the valve immediately and report the faults to the responsible
personnel.
• Do not change or modify the valve except for the pilot oil supply of the
pilot-operated valves 4WRLE_4X.

Safety instructions 11/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
2.6 Product-specific safety instructions
WARNING
Non-compliance with functional safety!
Valves control movements in machines or systems. In case of mechanical and
electric faults, e.g.failure of the energy supply, persons may be caught by the
system, kicked away or bruised.
 During set-up of your circuit, observe the applicable standards on functional
safety, e.g.ENISO13849-1.
Dangerous movement!
It is not allowed for persons to stay within the range of motion of machines
and machine parts. The following are examples of possible measures against
unintended access of persons:
• Protective fences
• Protective grids
• Protective covers
• Lightbarrier
 If persons must access the danger zone during active control, monitoring
or measures must be provided for personal safety which are superior to the
system. These measures must be provided according to the specific data
of the system and on the basis of the risk and error analysis of the system
manufacturer/user. In this connection, the safety provisions applied for the
system must be taken into account.
 In case of faults impairing the safety and changes in the operating behavior,
shut down the valve immediately and report the faults to the responsible
personnel.
Pressurized system parts and leaking hydraulic fluid!
When working at hydraulic systems with stored pressure energy (accumulator or
cylinders working under gravity), valves may even be pressurized after the pressure
supply has been switched off. During assembly and disassembly works, valves and
related components may fly around and cause personal injuries and/or damage
to property. There is moreover the danger of serious injury caused by a powerful
leaking hydraulic fluid jet.
 Ensure before working at the hydraulic product that the hydraulic system is
depressurized and the electrical control de-energized.
 Completely unload the pressure at machines and systems before working at
hydraulic products.
Electrostatic processes!
Valve electronics are sensitive to electrostatic charging and can be damaged.
This can lead to uncontrolled reactions at the valve.
 During assembly and troubleshooting of valves with integrated electronics,
observe applicable ESD regulations.
 Do not touch any electric pins. Do not remove the electronics housing.

12/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
WARNING
Incorrect connection!
Risk of injury caused by electric shock!
 The valve may only be connected by or under the supervision of aspecialized
electrician.
 Switch off the voltage supply before all maintenance, repair or installation works
and secure it against restarting.
 Provide for proper, safe PE connection.
 As supply voltage of the valve with IO-Link interface, functional low voltages
with electric separation (PELV or SELV) according to VDE0100, part 410 must
be used.
 For the external voltage supply, it must be ensured that, even in error cases, the
voltage limitation defined for the valve is not exceeded. PELV power supply units
according to EN60204, section 6.4.2 comply with these requirements.
 Only connect voltages and electric circuits provided with asafe isolation from
dangerous voltages. Safe isolation can be achieved with isolation transformers,
safe optocouplers or mains-free battery operation.
Notice:
When calculating the PFH (probability of dangerous failure per hour) of the
safety function, the PFH of the external voltage supply must also be taken
into account.
Incorrect mounting!
Mounting of valves with mounting screws of reduced stability, insufficient mounting
or fastening at blocks and plates with insufficient stability may lead to components
becoming loose and falling down. Consequently, hydraulic fluid may leak and
lead to personal injuries and/or damage to property. Valves with high weight may
cause bruises or fatal injury. Particular caution applies to valves with suspended
installation.
 Completely assemble the valve according to the assembly specifications by
means of suitable assembly aids.
 Only assemble the valve at blocks or plates suitable for the weight of the valve.
 Comply with tightening torques and screw stabilities.
Missing equipotential bonding!
Electrostatic processes, an incorrect grounding concept or missing equipotential
bonding may lead to malfunctions or uncontrolled movements at the machine and
thus cause injuries.
 Provide for correct grounding and proper equipotential bonding.

Safety instructions 13/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
WARNING
Penetrating water and humidity!
In case of use in humid or wet environments, water or humidity may penetrate
at electrical plug-in connectors or the valve electronics. This case may lead to
malfunctions at the valve and to unexpected movements in the hydraulic system
which may result in personal injury and damage to property.
 Do not use the valve with IO-Link interface outside or below its intended
IPprotection class.
 Ensure before the assembly that all seals and caps of the plug-in connections
are tight and intact.
Easily inflammable hydraulic fluid!
In connection with fire or other hot heat sources, leaking hydraulic fluid mist may
lead to fire or explosions due to defective or incompletely assembled valves and
their connections.
 Do not use the valve in areas with open fire and only at asufficient distance to
hot heat sources.
Electro-magnetic processes!
The valve electronics may be damaged if they are interfered with. This can lead to
uncontrolled reactions at the valve.
 Exchange valves with defective electronics right away and replace them with
anew device or original spare parts.
 The housing of the electronics serves as shielding from electro-magnetic
interferences. Do not remove the housing of the electronics.

14/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
CAUTION
Contaminated hydraulic fluid!
Contamination in the hydraulic fluid may cause functional failures e.g.jamming or
blocking of nozzles of the valve. In the worst case, this may result in unexpected
system movements and thus constitute arisk of injury for persons.
 Ensure adequate hydraulic fluid cleanliness according to the cleanliness classes
of the valve over the entire operating range.
Hot surfaces!
Valves may heat up considerably during operation. Skin contact can lead to burns
and contact with materials that are flammable or not heat-resistant can lead to
damage to property or fire hazard.
 Avoid contact with the valve during operation.
 Allow the valve to cool down sufficiently before touching it or wear
protective gloves.
 Keep materials that are flammable or not heat-resistant away from
hydraulic valves.
 If necessary, attach protective covers.
Exceeding of maximum temperatures!
Use of the valve outside the intended temperature may lead to functional failures
like e.g.overheating of the valve solenoids. In the worst case, this may result in
unexpected system movements and thus constitute arisk of injury for persons.
 Only use the safety valve within the intended ambient and fluid temperatures.
Leakage in case of incorrect working temperatures!
Use of the valve outside the intended temperature range may lead to permanent
leakage at the valve. Thus, hydraulic fluid in the form of a leaking hydraulic fluid jet
may injure persons, lead to damage to property and endanger the environment.
 Only use the safety valve within the intended ambient and fluid temperatures.
 In case of leakage, immediately exchange damaged seal rings or the valve.
Corrosion!
If the valve is used in humid environments or water, the valve and mounting screws
may corrode. Thus, the mounting screws and the valves lose their stability and may
become loose and thus constitute a risk of injury.
 Use mounting screws with adequate corrosion protection and exchange the
mounting screws with serious corrosion damage.
 Provide for adequate corrosion protection and exchange valves with serious
corrosion damage at an early stage.

Safety instructions 15/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
Contact with salt water leads to increased corrosion on the valve. Mounting screws
and plug screws as well as moveable components such as hand levers may be
chemically corroded and damaged.
Take suitablecorrosion protection measures.
2.7 Safety equipment
WARNING
Dangerous movements!
Danger to life, risk of injury or damage to property!
 Only use the approved control spool types specified in the corresponding
valve datasheet. Otherwise, secure shut-off of the valve and the related
safety function are no longer provided.
2.7.1 Use of the valve with IO-Link interface according to EN13849-1
The valve can be used in systems up to PL d, category 3 according to EN13849-1.
The valve can be used as shut-down element to ensure compliance with the
requirements of asecure start inhibitor according to EN60204 stop category 0.
In two-channel applications, i.e. applications with PL d, cat. 3 according to
EN13849-1, the valve can be used as shut-off channel.
As aprecondition, appropriate monitoring/plausibility checks with the requiredDCavg
for the entire application must be provided by the user or programmed into
asuperior control system.
With symbols E, E1-, W and W1-, the valve can be used as shut-off element in
applications of categories 1, 2 or 3 with up to PL d in compliance with EN13849-1.
Depending on the category or application, additional safety measures must be taken
according to EN13849-1 and operating instructions 29118-B must be observed.
In every safety-relevant application, asafe shut-off of the IO-Link-B voltage
(pin 2 and 5) must be ensured according to EN13849-1.
The safe shut-off is not part of the IO-Link valve and must be taken into account
for the safe design of the machinery.
Despite all measures taken in terms of plausibility check and monitoring, using the
valve involves significant residual risks. These must be evaluated by the machine
integrator depending on the individual application. For appropriate evaluation,
BoschRexroth provides the safety parameters of the valve with IO-Link interface
according to EN13849-1. See chapter2.7.4 "MTTFd,DC, CCF".
Safe shut-off with IO-Link

16/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
2.7.2 Limits of the safety-related parts
Assessment of the valve with IO-Link interface according to ISO 13849-2:
• Potential failures or unidentified error states of the valve with IO-Link interface
always require application-dependent and suitable system-related measures
according to EN13849-1 (seechapter2.7.1).
• When using the valve with IO-Link interface in compliance with categories
2 or 3 according to EN13849-1, adequate cyclic diagnosis or monitoring of the
valve function outside of the valve by the control system must be implemented
by the machine integrator. Without suitable diagnostic measures, only cat.
B or 1 according to EN13849-1 can be reached.
2.7.3 Residual risks/error states
The following residual risks or error states may occur and must be taken into
account by appropriate system-related measures:
• Complete failure of the electronics of the valve
• Faulty output of operating states
• Uncontrolled movement of the valve control spool(may lead to uncontrolled
movement of the cylinder)
• Fuse protection in the case of short-circuits in the electronics of the valve with
IO-Link interface by means of appropriate protection and design of the supply line
(fuse protection against currents >4 A).
2.7.4 MTTFd, DC, CCF
For valves with IO-Link interface, MTFFdvalves can be calculated according to the
information specified in the table using the following formula:
Table 6: Information for calculation of the MTTFdvalue
1
1 11
dGesamt
dHydraulikteil dAbschaltpfad dNetzteil
MTTF
MTTF MTTF MTTF


MTTFdvalues
Typeof
actuation
Valve type Hydraulic
components
Switch-off path SELV/PELV power supply
unit + safe IO-Link terminal
MTTFdvalue
Valve and
electronics
switch-off path
(without
additional
components)
Example of total
MTTFdvalue
(for power supply
unit + IO-Link
terminal with MTTFd
value of 1 mio.h)
Direct actuated
valves
4WRPEH10
4WRPEH6
4WRPE6
4WRPE10
150 years 1000 years
MTTFdvalue depending
on manufacturer of power
supply unit + safe IO-Link
terminal
(MTTFd=approx.2xMTBF)
e.g.MTBF=500000 h
 MTTFdvalue =
approx.1 mio. h(114 years)
130 years 6
Pilot-operated
valves
4WRLE 75 years 1000 years 69 years 43

Safety instructions 17/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
The specified MTTFd values are subject to the limitations from RE 08012
(see "Exceptions/limitations" for "admissible spool design; maximum longitudinal
spool acceleration" in chapter "Proportional directional valves" on page5).
TheDC depends on the system and on the use of asafety PLC (seechapter2.2
"Intended use").
By using the valves as intended, aCCF of at least 65 points can be reached.
2.7.5 Limits for the operation
The following operating conditions apply to the valves, seedatasheet.
• Ambient temperature range: -20...60°C
• Supply voltage range 18...36 VDC, seedatasheet
• Additional external precautionary measures must be taken against overvoltage,
e.g.in the form of fuses and varistors.
Variations may occur depending on the valve used. They can be found in the
corresponding valve datasheet. There, you also find the valve-related operating
conditions.
2.7.6 Switch-off / switch-on times
The switch-off time generally depends on the valve type usedand the hydraulic
operating state. The table below lists typical values below the performance limits.
The min. switch-on time results from the required run-up time of the electronics
(switching on of Class-B voltage) and the time it takes to respond to a command
value input with a change in current at the solenoid. It does not correspond to
a stable control position (the change in position of the spool is not taken into
account in the switch-on time).
Table 7: Typical switch-on and switch-off times
Valve type Switch-on time Typical switch-off time
4WRPEH6...-3X 3 ms < 15 ms
4WRPEH10...-3X 3 ms < 20 ms
4WRPE6...-3X 3 ms < 30 ms
4WRPE10...-3X 3 ms < 45 ms
4WRPE10_EA...-3X 3 ms < 45 ms
4WRLE10...-4X 3 ms < 50 ms
4WRLE16...-4X 3 ms < 50 ms
4WRLE25/27...-4X 3 ms < 50 ms
4WRLE35...-4X 3 ms < 200 ms

18/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
2.7.7 Connection example/block diagram for IO-Link valves
For category 1, the supply voltage of valve pin 2 and 5 must be safely switched off.
In this example, this is realized by means of safe limit switches at doors in
connection with asafe IO-Link terminal.
The voltage can also be safely switched off via an IO-Link-Master for safe shut-off of
the B voltage according to 13849-1.
Fig. 1: Category 1 block diagram
Category 1
M
3~
IO-Link
terminal with
safe separation
of power supply
from bus
K3
K2
IO-Link 24 V
1A
Dangerous
movement
High-response valve with
OBEA-V5 electronics and
IO-Link Class B
other actuators
Determination of
position
Control a
Control b
ab
P T
AB
1V3
1S3
OBEA-V5
IO-Link
interface
IOL-Master
Outputs
PLC
Inputs
K1
O1.1
I1.1 I1.2
ÜB1
ÜB2
B1
ÜB1
B2
ÜB2
24 V
Open
Closed
1V2
1Z2
1S1 1S2
1Z1
1V1
1M 1P

Safety instructions 19/44
RE29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; BoschRexrothAG
For category 2, the valve with the OBEA-V5 interface must also be tested cyclically
via the PLC with regards to the connection example according to cat. 1. For error
cases, asecond switch-off channel must also be implemented. In this example, the
oil supply/hydraulic pump is switched off. In compliance with EN13849-1, cat. 2
requires running testing of valve switch-off by machine control at start-up and in
adequate intervals during running operation.
Fig. 2: Category 2 block diagram
Category 2
M
3~
L
IO-Link terminal
with safe
separation of
power supply
from bus
K3
K2
IO-Link 24 V
1A
Dangerous
movement
High-response valve with
OBEA-V5 electronics and
IO-Link Class B
other actuators
Determination of
position
Control a
Control b
ab
P T
AB
1V3
1S3
OBEA-V5
IO-Link
interface
IOL-Master
Outputs
PLC
Inputs
K1
O1.1
I1.1 I1.2
ÜB1
ÜB2
B1
ÜB1
B2
ÜB2
24 V
Open
Closed
1V2
1Z2
1S1 1S2
1Z1
1V1
1M 1P
O1.2
Q1
2.7.7 Connection example/block diagram for IO-Link valves
For category 1, the supply voltage of valve pin 2 and 5 must be safely switched off.
In this example, this is realized by means of safe limit switches at doors in
connection with asafe IO-Link terminal.
The voltage can also be safely switched off via an IO-Link-Master for safe shut-off of
the B voltage according to 13849-1.
Fig. 1: Category 1 block diagram
Category 1
M
3~
IO-Link
terminal with
safe separation
of power supply
from bus
K3
K2
IO-Link 24 V
1A
Dangerous
movement
High-response valve with
OBEA-V5 electronics and
IO-Link Class B
other actuators
Determination of
position
Control a
Control b
ab
P T
AB
1V3
1S3
OBEA-V5
IO-Link
interface
IOL-Master
Outputs
PLC
Inputs
K1
O1.1
I1.1 I1.2
ÜB1
ÜB2
B1
ÜB1
B2
ÜB2
24 V
Open
Closed
1V2
1Z2
1S1 1S2
1Z1
1V1
1M 1P
Q1

20/44 Safety instructions
BoschRexrothAG, 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; RE 29118-B/09.2021
For use according to category 3 in compliance with EN 13849-1, asecond safe
switch-off element must be implemented in addition to the valve with
OBEA-V5 interface. In the example, this is realized with aposition-monitored
directional switching valve.
Fig. 3: Category 3 block diagram
2.8 Personal protective equipment
Check specified personal protection for completeness and protective effect and have
it available (please observe customer specification and list of personal protection!)
2.9 Obligations of the machine end-user
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 must 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.
Category 3
M
3~
IO-Link terminal
with safe
separation of
power supply
from bus
K3
K2
IO-Link 24 V
1A
Dangerous
movement
High-response valve with
OBEA-V5 electronics and
IO-Link Class B
other actuators
Determination of
position
Control a
Control b
ab
P T
AB
1V4
1S4
OBEA-V5
IO-Link
interface
IOL-Master
Outputs
PLC
Inputs
K1
O1.1
I1.1 I1.2
ÜB1
ÜB2
B1
ÜB1
B2
ÜB2
24 V
Open
Closed
1V2 1Z2
1S1 1S2
1Z1
1V1
1M 1P
ÜB3
I1.3 I1.4
1S3
B3
ÜB3 1V3
B3
K1
1S3
1V3