Bosch rexroth VT-MSPA2-2X/A5/1A5/000 User manual

Operating instructions
RE 30232-02-B, Edition: 02.2021, EN
Valve amplifier for proportional
valves without electrical
position feedback
Maximum current limitation 1.5 A
VT-MSPA2-2X/A5/1A5/000

The data specified only serve 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 specifications do not constitute
assured characteristics. 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.
© This document, as well as the data,
specifications and other information set forth
in it, are the exclusive property of Bosch
Rexroth AG.
It may not be reproduced or given to third
parties without its consent.
The cover shows an example configuration.
The product delivered may differ from the
image on the cover.
Translation of the original operating
instructions. The original operating
instructions were prepared in German
language.

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
Content | Valve amplifier VT-MSPA2-2X 3/36
Content
1 About this documentation ....................................................................... 5
1.1 Validity of the documentation .....................................................................5
1.2 Required and supplementary documentation..............................................5
1.3 Representation of information ....................................................................5
1.3.1 Safety instructions ......................................................................................5
1.3.2 Symbols ......................................................................................................6
1.3.3 Designations ...............................................................................................6
1.3.4 Abbreviations ..............................................................................................6
2 Safety instructions .................................................................................. 7
2.1 About this chapter.......................................................................................7
2.2 Intended use ...............................................................................................7
2.3 Improper use...............................................................................................7
2.4 Qualification of personnel...........................................................................8
2.5 General safety instructions .........................................................................8
2.6 Product- and technology-related safety instructions....................................9
2.7 Personal protective equipment..................................................................10
2.8 Operator‘s obligations...............................................................................10
3 General information on damage to property anddamage to the product 11
4 Scope of delivery................................................................................... 12
5 About this product................................................................................. 12
5.1 Identification of the product .....................................................................12
6 Transport and storage............................................................................ 13
6.1 Storing the VT-MSPA2-2X ..........................................................................13
7 Mounting ............................................................................................... 13
7.1 Required tools...........................................................................................14
7.2 Recommended accessories .......................................................................14
7.3 Installation conditions...............................................................................14
7.3.1 Place of installation ..................................................................................14
7.4 Installing und connecting the VT-MSPA2-2X ..............................................14
7.5 Connecting the supply voltage ..................................................................15
7.5.1 Shielding...................................................................................................16
7.5.2 General notes on wiring ............................................................................16
7.5.3 Connecting the individual contacts ...........................................................17
7.5.4 Suppressing interference of the system ....................................................18
8 Commissioning ...................................................................................... 18
8.1 Block circuit diagram of VT-MSPA2-2X ......................................................19
8.2 Operating and display elements................................................................20
8.2.1 Status LEDs...............................................................................................20
8.2.2 Test jacks ..................................................................................................21
8.3 Selecting the valve types...........................................................................21
8.4 Menu.........................................................................................................22
8.4.1 Menu structure..........................................................................................22
8.5 Parameter setting......................................................................................23
8.5.1 Explanation of menu level “Standard mode“.............................................24
8.5.2 Explanation of menu level “Expert mode“ .................................................24
8.6 Restoring the VT-MSPA2-2X to factory settings .........................................26
9 Operation .............................................................................................. 27
10 Maintenance and repair......................................................................... 28
10.1 Cleaning and care .....................................................................................28
10.2 Inspection and maintenance .....................................................................28
10.3 Repair .......................................................................................................28

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Bosch Rexroth AG, Edition 02.2021, RE 30232-02-B
11 Demounting and replacement................................................................ 29
11.1 Required tools...........................................................................................29
11.2 Preparing demounting...............................................................................29
11.3 Demounting the valve amplifier .................................................................29
11.4 Preparing the components for storage or further use................................30
12 Disposal ................................................................................................ 31
12.1 Environmental protection ..........................................................................31
12.2 Return to Bosch Rexroth AG......................................................................31
12.3 Packaging..................................................................................................31
12.4 Materials used...........................................................................................31
12.5 Recycling...................................................................................................31
13 Extension and modification ................................................................... 32
14 Troubleshooting .................................................................................... 32
14.1 How to proceed for troubleshooting..........................................................32
15 Technical data ....................................................................................... 32
16 Annex .................................................................................................... 33
16.1 List of addresses.......................................................................................33
17 Alphabetical index ................................................................................ 34

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
About this documentation | Valve amplifier VT-MSPA2-2X 5/36
1 About this documentation
1.1 VALIDITY OF THE DOCUMENTATION
This documentation is valid for valve amplifier VT-MSPA2-2X/A5/1A5/000 from
Bosch Rexroth.
This documentation is intended for fitters, operators, service technicians, system
operators and machine manufacturers.
This documentation contains important information on the safe and appropriate
installation, transport, commissioning, operation, use, maintenance, and removal
of the product.
▶ Read this documentation thoroughly, especially Chapter 2 “Safety instructions“
and Chapter 3 “General notes on damage to property and damage to the
product“, before working with the product.
1.2 REQUIRED AND SUPPLEMENTARY 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. The documentations can be found on the product site or at www.
boschrexroth.com/mediadirectory.
Table 1: Required and supplementary documentation
Title Document number Document type
Order confirmation
Valve amplifier for proportional valves without electrical position
feedback, maximum current limitation 1.5 A, type VT-MSPA2-2X/
A5/1A5/000
30232-02 Data sheet
1.3 REPRESENTATION OF INFORMATION
In order that this documentation allows you to work directly and safely with your
product, standardized safety notes, symbols, terms, and abbreviations are used.
For a better understanding, they are explained in the following sections.
1.3.1 Safety instructions
In this documentation, safety instructions precede a sequence of activities
whenever there is a risk of personal injury or damage to equipment. The hazard
avoidance measures described 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 symbol: draws attention to a hazard
• Signal word: identifies the degree of hazard

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BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
• Type and source of danger: Specifies the type and source of danger
• Consequences: describes the consequences in case of non-observance
• Precaution: specifies how the hazardous situation can be prevented
Table 2: Hazard classifications according to ANSI Z535.6-2011
Warning sign, signal word Meaning
DANGER Indicates a hazardous situation which, if not avoided, will
certainly result in death or serious injury.
WARNING Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
NOTICE Damage to property: The product or the environment could
be damaged.
1.3.2 Symbols
The following symbols indicate notices which are not safety-relevant but increase
the comprehensibility of the documentation.
Table 3: Meaning of the symbols
Symbol Meaning
If this information is disregarded, the product cannot be used or operated in an
optimum manner.
▶ 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 Designations
The following terms are used in this documentation:
Table 4: Designations
Designation Meaning
RE xxxxx Rexroth document in English language
VT-MSPA2-2X Valve amplifier
1.3.4 Abbreviations
The following abbreviations are used in this documentation:
Table 5: Abbreviations
Abbreviation Meaning
ANSI American National Standards Institute
EMC Electromagnetic compatibility
FC Frequency converter
PELV Protective Extra Low Voltage

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
Safety instructions | Valve amplifier VT-MSPA2-2X 7/36
2 Safety instructions
2.1 ABOUT THIS CHAPTER
The product has been manufactured according to the generally accepted codes of
practice. However, there is still a risk 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
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 product on to
third parties.
2.2 INTENDED USE
The product is an electronic component.
You may use the product as follows:
• For operating proportional hydraulic valves without electrical position feedback
which are used in a potentially explosive atmosphere.
• For use as specified in technical data sheet RE 30232-02
• While adhering to the operating and ambient conditions according to data sheet
RE 30232-02, especially exclusively outside the potentially explosive atmosphere
• While adhering to the given performance limits
• In the original condition, without damage
• Repairs by customers are not permitted
The product is intended exclusively for professional use and not for private usage.
Operation according to the intended use also implies that you have read
and understood this documentation completely, especially chapter 2 “Safety
instructions“.
2.3 IMPROPER USE
Any use other than described in the section “Intended use” is considered as
improper and is therefore not permitted.
Bosch Rexroth AG does not assume any liability for damage caused by improper
use. The user assumes all risks involved with improper use.
Improper use includes, but is not limited to:
• operating the electronics outside the specified performance limits and operating
conditions, especially the prescribed ambient conditions;
• the use as safety-related part of controls in the sense of DIN EN ISO 13849.
Functional safety must be realized by means of appropriate, additional
components.
• use in potentially explosive atmospheres
• improper handling and transport
• improper storing
• lack of cleanliness during storage and assembly
• incorrect installation

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2.4 QUALIFICATION OF PERSONNEL
The activities described in this documentation require basic knowledge of electrics
and hydraulics as well as knowledge of the associated technical terms. In order
to ensure safe use, these activities may only be carried out by an expert in the
respective field or an instructed person under the direction and supervision of an
expert.
Experts are those who are able to 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 requirements pertaining
to the work to be undertaken. An expert must observe the relevant specific
professional rules and have the necessary expert knowledge.
With regard to electronic products, expertise means, for example:
• the ability to read and completely understand circuit diagrams,
in particular, completely understanding the correlations regarding safety
equipment and
• knowledge of the function and structure of electrical and electronic components.
Bosch Rexroth offers training courses that support your qualification in specific
fields. You can find an overview of training contents on the Internet at: http://
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 notices on the product.
• Persons who install, commission, operate, demount or maintain Rexroth
products must not consume any alcohol, drugs or pharmaceuticals that may
affect their ability to respond.
• Only use accessory and spare parts released by the manufacturer in order to
rule out personnel hazards arising from unsuitable spare parts.
• Comply with the technical data and ambient conditions specified in the product
documentation.
• If unsuitable products are installed or used in safety-relevant applications,
unintended operational states can occur in these applications, which can cause
personal injury and damage to property. Therefore, use the product only in
safety-relevant applications, if this use is expressly specified and permitted in
the documentation of the product, for example, in explosion-protection areas or
in safety-related parts of a control (functional safety).
• You may commission the product only when it has been established that the
final product (for example, a machine or system), in which the Rexroth product
is installed, complies with national regulations, safety regulations and standards
relevant for the application.

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
Safety instructions | Valve amplifier VT-MSPA2-2X 9/36
2.6 PRODUCT- AND TECHNOLOGY-RELATED SAFETY
INSTRUCTIONS
WARNING
Hazardous movements!
Risk of injury due to incorrect connection or incorrect activation of electrical and
electronic devices and resulting unforeseeable machine movements.
▶ Observe safety in accordance with EN ISO 13849 or IEC 62061.
▶ If persons have to enter the hazard zone while the control is active, provide
superordinate monitoring functions or measures for personal safety. 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.
▶ Failures and defects in the control current or the energy supply can result in
uncontrolled machine movements.
▶ Electronics emit interference to other electronics within the permitted limit
values and also react to interference. This can cause malfunction in the
control process. Only use electronics below EMC limit values or provide
appropriate shielding.
▶ Electrostatic processes, an inadequate grounding concept or missing
equipotential bonding can lead to damage to the electronics and hence
cause malfunction or uncontrolled movements of the machine. Ensure proper
grounding and provide equipotential bonding.
▶ Using the product outside the specified IP protection class can result in
short-circuit and malfunction and hence in uncontrolled machine movements.
Therefore, use the product only within the IP protection class and in
environments as specified in the data sheet.
▶ Provide safety functions for personal safety separately. Amplifiers, command
value processing cards and control electronics themselves do not include
safety functions for personal safety and are no safety-related components.
▶ Avoid contact with salt-laden environments and adhere to the ambient
temperature given in the data sheet.
▶ In the event of an emergency, fault or other abnormalities, switch the system
off and secure it against being switched on again.
High electrical voltage by incorrect connection!
Danger to life, risk of injury due to electric shock.
▶ When carrying out any work, disconnect the relevant machine section from the
power supply and protect it against being switched on again.
▶ Only connect devices, electrical components and cables which feature
protective extra low voltage (PELV) to connections or terminals having
voltages from 0 to 50 Volt.
▶ Only connect voltages and power circuits that feature safe isolation
from dangerous voltages. Safe isolation can be achieved with isolation
transformers, safe optocouplers or mains-free battery operation.
▶ Always connect all cables to the provided connections. Avoid open cables or
contacts.

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BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
WARNING
Lightning!
Risk of uncontrolled machine movements.
▶ An inadequate grounding concept or missing equipotential bonding can lead to
damage to the electronics. Provide for equipotential bonding of the device
CAUTION
Fault currents and short-circuits!
Impairment of safety and malfunction.
▶ Keep the surroundings free from electrically conductive contamination (acids,
bases, corrosive agents, salts, metal vapors, etc.) and do not expose the
device to these substances. Generally rule out any deposits according to
protection class IP.
2.7 PERSONAL PROTECTIVE EQUIPMENT
Check determined personal protective equipment for completeness and protective
effect and wear it (observe customer regulations and list of personal protective
equipment).
2.8 OPERATOR‘S OBLIGATIONS
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.

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
General information on damage to property anddamage to the product | Valve amplifier VT-MSPA2-2X 11/36
3 General information on
damage to property
anddamage to the product
NOTICE
High voltage!
The electronics may be damaged.
▶ Wire electronics from Bosch Rexroth only when these are disconnected from
the power supply.
Wrong cables! Power loss, scorching of cable!
Risk of damage to the product!
▶ Only use the cables specified in the data sheet with the respective cable
cross-sections for electronic devices from Bosch Rexroth!
Radiated interference!
Risk of malfunction.
▶ The distance to radio sources must be sufficiently large (>> 1 m).
▶ In the case of strongly fluctuating operating voltage, it may be necessary to
use an external smoothing capacitor in individual cases.
Emitted interference!
Risk of affecting other devices.
▶ Use shielded signal and solenoids cables in order that EMC requirements are
fulfilled.
Overloading!
Risk of overloading and damage to the supply cable in the case of insufficient
dimensioning and/or operation with several electrical devices.
▶ Provide current limitation by overload protection.
▶ Select an appropriate rating of power supply units and cables.
Short-circuit!
Risk of overloading and damage of the supply cable in the case of defects of the
electrical device.
▶ Provide current limitation by overload protection.
Impermissible temperature range!
Risk of overheating. The devices can be thermally destroyed.
▶ Adhere to the specification in the data sheet.
Cables lying around!
Risk of stumbling!
▶ Lay cables and lines so that they cannot be damaged and no one can trip over
them.
The warranty only applies to the delivered configuration.
The warranty becomes void if the product is incorrectly mounted, commissioned
or operated, not used as intended and/or handled improperly.

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BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
4 Scope of delivery
Information on the scope of delivery can be found in the shipping documents and
data sheet RE 30232-02 of your Bosch Rexroth product.
▶ Check the scope of delivery for completeness and possible transport damage.
In case of complaints, please contact Bosch Rexroth AG, see chapter 16.1 “List
of addresses“ on page 33.
5 About this product
You can find information on the product and its performance in the data sheet
of your electronics.
5.1 IDENTIFICATION OF THE PRODUCT
The most important data of the product are given on a label or are printed directly
at the side of the product. The nameplate below shows the standard variant.
1 Word mark
2 Material short text
3 Plant
4 QR code
5 Date of manufacture
6 Country of origin
7 Customer-specific data
8 Serial number
9 Material number
10 Electrical data and protection
class
23
1
10
95
6
4
7
8

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
Transport and storage | Valve amplifier VT-MSPA2-2X 13/36
6 Transport and storage
There are no special instructions for transporting electronic products. You must,
however, observe the notes in Chapter 2 “Safety instructions” and comply with the
ambient conditions for storage and transport which are detailed in the technical
data sheet RE 30232-02.
6.1 STORING THE VT-MSPA2-2X
Proceed as follows in order to prepare electronics from Bosch Rexroth for storage
and further use:
▶ Whenever possible, use the original packaging for storage.
▶ Observe the permissible storage temperature range specified in the data sheet.
▶ Protect the electronics from dust and humidity and UV radiation.
7 Mounting
NOTICE
Risk of short-circuit!
In the case of electronics with housing, water may condense within the housing!
▶ Let the electronics acclimate itself for several hours, as otherwise water may
condense in the housing.
The electronics are provided with cooling slots According to the specified
protection class, dirt and fluids may easily enter and cause malfunction and
short-circuit! Reliable operation is thus no longer ensured.
▶ When working on the electronics, observe strictest cleanliness and make sure
that no fluids will enter the housing.
Major potential differences!
Risk of destruction of electronics by plugging or unplugging connectors under
voltage.
▶ Switch off power supply to the relevant system part before installing the
products or plugging or unplugging connectors.
Radiated interference!
Risk of malfunction.
▶ The distance to radio sources must be sufficiently large (>> 1 m).
▶ Do not lay solenoid or signal cables near power cables.
▶ Shield command and actual value cables. Connect the shield to system
ground on both ends.

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BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
7.1 REQUIRED TOOLS
A screwdriver (blade width 2.0 mm, blade thickness 0.4 mm) is required for
connecting flexible cables to the terminals of the VT-MSPA2-2X. For commissioning
we recommend that you use a multimeter (measuring lead with 2-mm connectors).
Further tools are not required.
7.2 RECOMMENDED ACCESSORIES
For the connection of the VT-MSPA2-2X we recommend the following accessories
(Table 6). These accessories are not included in the scope of the supply, but have
to be ordered separately:
Table 6: Accessories
Designation Material no.
Shield kit for installation with shielded cables
(SERVICE PACKAGE VT-HMC...-1X/M...SCHIR&*ET)
R961011117
7.3 INSTALLATION CONDITIONS
▶ When installing the amplifier, strictly adhere to the ambient conditions
specified in data sheet RE 30232-02.
▶ The housing of the VT-MSPA2-2X complies with protection class IP20.
Requirements that exceed type of protection IP20 have to be ruled out. Avoid
contact of the VT-MSPA2-2X with hydraulic fluids, acids, bases, corrosive
agents, salts, metal vapors, solvents, etc.
7.3.1 Place of installation
Electronics from Bosch Rexroth are intended for installation in control cabinets.
Outdoor installation is not permitted.
7.4 INSTALLING UND CONNECTING THE VT-MSPA2-2X
The dimensions of valve amplifier VT-MSPA2-2X are given in data sheet RE
30232-02. The installation orientation is vertical. Observe the required mounting
distances:
• The distance to covers and walls must be at least 2 cm.
• At ambient temperatures above 70 °C, provide a minimum distance of 1 cm to
the next assembly.
• By snapping the housing of the VT-MSPA2-2X on a conductive and earthed
mounting rail, the earth connection is established with the rear wall of the
control cabinet. This constitutes HF grounding of the VT-MSPA2-2X.
• Do not use any silicone-containing sealants, adhesives or insulating agents.
• Ensure maintenance-friendly installation, i.e. simple access to the connection
lines. Ensure free access to the connection side.
• Lay cables and lines so that they cannot be damaged and no one can trip over
them.
Install the VT-MSPA2-2X as follows on a DIN mounting rail in the control cabinet:
1. Disconnect the relevant system part from the power supply.

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
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2. Snap the back panel of the VT-MSPA2-2X carefully into position on the DIN
mounting rail. Mechanical contact points on the rear panel of the VT-MSPA2-2X
ensure firm seating on the DIN mounting rail and the connection of the housing
to the grounding system of the control cabinet.
Fig. 1: Mounting the VT-MSPA2-2X on a DIN mounting rail
Should the spring-loaded latch not snap open automatically, it can be released
using a screwdriver (see Fig. 1 on the right). After having positioned the latch, let
it spring back into the engaged position.
Observe the following when connecting the VT-MSPA2-2X:
▶ For mounting, observe the notes on applicable standards and operating
conditions in data sheet RE 30232-02.
▶ Do not use connectors with free-wheeling diodes or LED lamps for connecting
solenoid cables to the valve!
▶ Use low-capacitance cables.
▶ Whenever possible, execute cable connections without intermediate terminals.
▶ Install sensor cables separately.
▶ When sources of electromagnetic disturbance are used (e.g. frequency
converter), malfunction may occur. Avoid the installation of the VT-MSPA2-2X in
the direct vicinity to sources of disturbance.
▶ The distance to aerial lines, radio sources and radar equipment must be at
least 1 m.
▶ Do not lay signal cables near power cables.
▶ The system ground is an essential, integral part of EMC protection of the
VT-MSPA2-2X. Here, interference, which is transported to the VT-MSPA2-2X
via data and voltage supply cables, is dissipated. This function can only be
ensured, if the system ground itself does not inject interference into the control
electronics.
7.5 CONNECTING THE SUPPLY VOLTAGE
1. Disconnect the relevant system part from the power supply.
2. Inspect all cables for intactness.
3. Connect the signal and solenoid cables according to your circuit diagram to the
relevant terminals of the VT-MSPA2-2X.
4. Connect the supply voltage and check the presence of voltage by switching on.

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BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
7.5.1 Shielding
For digital inputs and outputs as well as for the command value and the actual
value the permissible cable length of unshielded cables is 30 m. In the case of
greater lengths use shielded cables with a copper braid shield. Connect the cable
shield on both ends and on a large area to the system ground. For connection of
the cable shield to the VT-MSPA2-2X we recommend the use of our shield kit, see
Fig. 2 (accessories, see chapter 7.2, page 14). As solenoid cables you may use
unshielded cables.
Fig. 2: Shielding of the VT-MSPA2-2X
7.5.2 General notes on wiring
▶ Install signal and power cables as far away from each other as possible and do
not install them in parallel.
▶ Do not route signal cables through strong magnetic fields.
▶ Lay signal lines as continuously as possible. If intermediate terminals are
required, the shield must be dealt with separately.
Install power cables consisting of two individual wires (e.g. voltage supply) as
twisted cables.
▶ Cables should only have the number of wires actually required. If this is
impossible, connect the wires with each other and connect them to ground on
one side in the control cabinet.

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
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Table 7: Recommended cable variants
Table 8: Clamping range, rated connection
Min. Max.
Rigid 0.2 mm² 2.5 mm²
Flexible 0.2 mm² 2.5 mm²
Flexible with wire end ferrule 0.25 mm² 2.5 mm²
The length to be stripped is 10 mm each.
7.5.3 Connecting the individual contacts
Fig. 3: XG20/XG21: “PUSH-IN“ contact
Interface Maximum
length [m]
Cable type Minimum
cross-section
[mm2]
Remarks
Digital in/out
30 Unshielded 0.25 to 2.5 For 30 m or more, shielded cable
required
50 Shielded 0.25 to 2.5
Command
value
30 Twisted pair 0.25 to 2.5 For 30 m or more, shielded cable
required
50 Twisted pair, shielded 0.25 to 2.5
Actual value
30 Twisted pair 0.25 to 2.5 For 30 m or more, shielded cable
required
50 Twisted pair, shielded 0.25 to 2.5
Solenoid cable 20 Unshielded 1.0 to 1.5
50 Unshielded 1.5 to 2.5
Operating
voltage
20 Unshielded 1.0 to 1.5
50 Unshielded 1.5 to 2.5
Solid wire With wire end ferrule
Flexible wire
1.
2.
3.

18/36 Valve amplifier VT-MSPA2-2X | Commissioning
BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
7.5.4 Suppressing interference of the system
Should interference occur in conjunction with signals of the VT-MSPA2-2X, check
the interference suppression of other electrical components, e.g. as follows:
Table 9: Suppressing interference
Possible causes of faults
Switched inductance DC: antiparallel free-wheeling diode over actuator winding
AC: type-related R/C combination over actuator winding.
Electric motors R/C combination from each motor winding to earth.
Frequency converter Inlet filter in the voltage supply of the frequency converter
Motor control lines shielded and installed separately from other
cables and/or output filter for motor cables.
Large-area contact of the frequency converter housing to the
rear wall of the control cabinet
8 Commissioning
NOTICE
Uncontrolled plugging and unplugging of connectors!
The device might be destroyed.
▶ Before plugging or unplugging connectors into or from the device, disconnect
the device from the power supply or de-energize it reliably!
Damage to the device caused by incorrect handling is not covered by the
warranty!
▶ Observe the protection class, the voltage supply and the environmental
conditions according to data sheet RE 30232-02.
For commissioning we recommend using a multimeter.

RE 30232-02-B, Edition 02.2021, Bosch Rexroth AG
Commissioning | Valve amplifier VT-MSPA2-2X 19/36
8.1 BLOCK CIRCUIT DIAGRAM OF VT-MSPA2-2X
Fig. 4: Block diagram
1 Mains adapter 2 Differential amplifier 3 Command value
summator
4 Zero point adjustment 5 Inversion 6 Simple ramp 7 4-quadrant ramp 8 Command value attenuator 9 Characteristic curve
generator
10 Flow controller 11 Clock pulse generator 12 Output stage 13 Enable or inversion or ramp off or 4Q ramp 14 Switching logic/error detection 15 Digital output
XH1
X2A
XH2
X2A
XH2
A
B
XH1
V
1 2
10
9 5 6
12 11
Zw -1
(1)
(2)
(5)
(11)
(12)(10) (12)(10)
(9) (9)
(7) (6)
(8)
(14)
(13) (15)
(4) (3)
8
4 3
7
U
U
0V
+24V +U
KBA
tt
tt t
tt
tt
IA
IA – IB
IB
t
KBB KBA
KBB
MO
-U
U
U(I)
U
U
U
U
ab
U
U
U
U
+In
-In
DI
-Out
+Out
G
x
y
B
S
GPWM
PID
PWM
PID
B
S
G
Enable
Logic
Actual
value
Supply voltage
Digital input
Test jack
Cable break Cable break
Enable Enable
Ready
For valves with only one solenoid, connection XH1 is used!

20/36 Valve amplifier VT-MSPA2-2X | Commissioning
BOSCH REXROTH AG, Edition 02.2021, RE 30232-02-B
8.2 OPERATING AND DISPLAY ELEMENTS
No. Meaning
1Status LEDs
Indicate the current operational state, menu levels and erroneous states
2SET key
Editing of the selected parameters, selection of the operating mode, selection of the
“Expert Mode“
3Keys + / -
Selection of parameters and setting of parameter values
4Rotary switch
Selection of the valve type
5Test jacks
Fig. 5: Front view with operating and display elements
8.2.1 Status LEDs
Permanently on
Flashing
Flickering
Off
DI Digital (enable) input
t Ramp
Z/B Command value zero point / biasing current
G Command value attenuator
S Command value step height
Ready for operation
1st quadrant (positive command value, increasing)
2nd quadrant (positive command value, falling)
3rd quadrant (negative command value, increasing)
4th quadrant (negative command value, falling)
Table 10: Indicator lamps
4
8
5
1
6
2
7
3
12
910 11
Set
t
DI
Z/B
G
S
IBIA
v
T
Valve
Select
0
9
8
7
654
3
2
1
MSPA2
1
2
3
4
5
Blinking code
Description of LED
indicator lamps
Indicator lamps Operating status Display mode Meaning
LED DI “digital
input“ (yellow)
Normal operation Permanently ON/OFF Status of digital input
Setup Flashing Standard setup active
Setup Off Expert setup active
Setup ON/blinking/flickering Expert setup: Setting of enable input
LED “ready“
(red/green)
Normal operation Permanently on green Module ready for operation
Normal operation Permanently on red Error
Normal operation and setup Blinking red/green Valve number changed (but not confirmed)
Normal operation and setup Blinking red Invalid valve number
Normal operation Off Module not ready for operation
Setup Flashing green Expert setup active