Bosch Rexroth VT-HMC 1X Series User manual

Operating instructions
RE 30239-B Edition: 01.2021 Replaces: 06.2017
Digital axis control
VT-HMC...1X

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.
An example configuration is shown on the
title page.
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 30239-B, Edition 01.2021, Bosch Rexroth AG
Content | Digital axis control VT-HMC...1X 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 ..............................................................................................7
2 Safety instructions .................................................................................. 8
2.1 About this chapter.......................................................................................8
2.2 Intended use ...............................................................................................8
2.3 Improper use...............................................................................................8
2.4 Qualification of personnel...........................................................................9
2.5 General safety instructions .........................................................................9
2.6 Product- and technology-related safety instructions..................................10
2.7 Personal protective equipment..................................................................11
2.8 Obligations of the machine end-user.........................................................11
3 General notes on damage to property and damage to the product ......... 12
4 Scope of delivery................................................................................... 12
5 About this product................................................................................. 13
5.1 Performance description...........................................................................13
5.2 Product description ..................................................................................13
5.3 Identification of the product .....................................................................15
6 Transport and storage............................................................................ 15
6.1 Storing the VT-HMC...1X............................................................................15
7 Installation............................................................................................ 16
7.1 Installation conditions...............................................................................16
7.2 Recommended accessories .......................................................................17
7.3 Installing the VT-HMC...1X.........................................................................17
7.3.1 Place of installation ..................................................................................18
7.3.2 Power supply ............................................................................................19
7.3.3 Supply of external components.................................................................19
7.3.4 Shielding...................................................................................................19
7.3.5 General notes on shielding .......................................................................20
7.3.6 Connecting the individual contacts ...........................................................21
7.3.7 Keying .......................................................................................................22
7.3.8 Wiring instructions....................................................................................23
7.3.9 Wiring example: Pressure sensor at analog input 1...................................23
7.3.10Suppressing interference of the system ....................................................25
8 Commissioning ...................................................................................... 25
8.1 Basic principles.........................................................................................25
8.2 Installation requirements ..........................................................................26
8.3 Activation of the synchronization technology function in the 2-axis version  ..
26
8.4 Creating a project with IndraWorks MLD and online parameterization......26
8.5 Commissioning software IndraWorks Ds or MLD.......................................27
9 Operation .............................................................................................. 28
9.1 Diagnostics ...............................................................................................28
10 Maintenance.......................................................................................... 29
10.1 Cleaning and care .....................................................................................29
10.2 Repair .......................................................................................................29

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Bosch Rexroth AG, Edition 01.2021, RE 30239-B
11 Demounting and replacement................................................................ 29
11.1 Preparing demounting...............................................................................29
11.2 Demounting the valve amplifier .................................................................30
11.3 Preparing the components for storage or further use................................30
12 Disposal ................................................................................................ 31
12.1 Environmental protection ..........................................................................31
13 Extension and modification ................................................................... 31
14 Troubleshooting .................................................................................... 31
14.1 How to proceed for troubleshooting..........................................................31
15 Technical data ....................................................................................... 32
16 Annex .................................................................................................... 32
16.1 List of addresses.......................................................................................32
16.2 Open Source Software ..............................................................................33

RE 30239-B, Edition 01.2021, Bosch Rexroth AG
About this documentation | Digital axis control VT-HMC...1X 5/36
1 About this documentation
1.1 VALIDITY OF THE DOCUMENTATION
This documentation is valid for the digital axis control VT-HMC of series 1X.
This documentation is intended for fitters, operators, service technicians, system
operators and machine manufacturers.
This documentation contains important information on the safe and proper
mounting, transport, commissioning, operation, use, maintenance, demounting
and simple troubleshooting 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 digital axis control.
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.
Tabelle 1: Required and supplementary documentation
Title Document number Document type
Digital axis control, type VT-HMC...1X RE 30239 Data sheet
Online help in commissioning software IndraWorks Integrated help
Rexroth HydraulicDrive HDS-16, HDx-17 to HDx-20,
Parameters
RE 30330-PA
www.boschrexroth.com/hmc
Parameter description
Rexroth HydraulicDrive, Functions RE 30338-FK
www.boschrexroth.com/hmc
Functional description
Rexroth HydraulicDrive HDS-16, HDx-17 to HDx-20,
Diagnostic Messages
RD 30330-WA
www.boschrexroth.com/hmc
Description of diagnostic
messages
Rexroth HydraulicDrive, Rexroth IndraMotion MLD
(2G)
RE 30336-AP
www.boschrexroth.com/hmc
Application manual
Rexroth HydraulicDrive, Rexroth IndraMotion MLD
(2G), Libraries
RE 30336-RE
www.boschrexroth.com/hmc
Library description
Release Notes RD 30330-RN
www.boschrexroth.com/hmc
Firmware Release Notes
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:

6/36 Digital axis control VT-HMC...1X | About this documentation
Bosch Rexroth AG, Edition 01.2021, RE 30239-B
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
• 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
Tabelle 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.
Tabelle 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:
Tabelle 4: Designations
Designation Meaning
VT-HMC...1X Digital axis control
IndraWorks Software
RE xxxxx Rexroth document in English language
Vencoder_ANA Supply voltage for external sensors

RE 30239-B, Edition 01.2021, Bosch Rexroth AG
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1.3.4 Abbreviations
The following abbreviations are used in this documentation:
Tabelle 5: Abbreviations
Abbreviation Meaning
CPU Central Processing Unit
I/O Inputs/Outputs
EMC Electromagnetic compatibility
FAT32 32-bit File Allocation Table
FC Frequency converter
HMC Hydraulic Motion Control
PC Personal Computer
PLC Programmable Logic Control
PELV Protective Extra Low Voltage
n.c. not connected

8/36 Digital axis control VT-HMC...1X | Safety instructions
Bosch Rexroth AG, Edition 01.2021, RE 30239-B
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 electrical component.
You may use the product as follows:
• For controlling one or two hydraulic axes in position control, force control,
alternating control (position/pressure or force) and velocity control in the
operating modes of direct valve control, drive-controlled position control,
drive-controlled positioning and positioning block mode, optional position
synchronization master/slave, average, min/max (optional) and optional force
synchronization.
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.
The installation or use of inappropriate products in safety-relevant applications
could result in unintended operating states in the application which in turn
could cause personal injuries and/or damage to property. Therefore, please only
use a product for 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).
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 digital axis control 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.

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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 hydraulic products, expertise means, for example:
• Reading and completely understanding hydraulic circuit diagrams,
• in particular, completely understanding the correlations regarding safety
equipment and
• knowledge of the function and structure of hydraulic components,
Operating the digital axis control VT-HMC...1X implies that the operator is familiar
with the PC program IndraWorks. We recommend that users attend a product-
specific training by Bosch Rexroth.
Documentation about IndraWorks and download options can be found at:
www.boschrexroth.com/IndraWorks
Bosch Rexroth offers training courses that support your qualification in specific
fields. An overview of the training contents can be found on the Internet at:
www.boschrexroth.com/didactic. Or contact our online support via the
e-mail address
[e-mail]
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.

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2.6 PRODUCT- AND TECHNOLOGY-RELATED SAFETY
INSTRUCTIONS
WARNING
Hazardous movements!
Risk of injury due to incorrect connection or incorrect activation of the digital axis
control and resulting unforeseeable machine movements.
▶ Observe safety in accordance with EN 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. Observe safety in accordance with EN ISO
13849 or IEC 62061.
▶ The electronics emits interference to other electronics within the permitted
limit values. This can cause malfunction in the control process. Only use
electronics below the EMC limit values or provide appropriate shielding.
▶ The electronics of the digital axis control VT-HMC...1X responds to
electromagnetic interference from non-shielded, improperly installed or
wrongly connected signal cables. If the limit values given in the data sheet are
exceeded, malfunction or uncontrolled movements are possible. Adhere to the
limit values given in the data sheet, use only electronics below the EMC limit
values or provide proper 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. The digital axis control
VT-HMC...1X itself does not include safety functions for personal safety and is
no safety-related component.
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.
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.

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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 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.

12/36 Digital axis control VT-HMC...1X | General notes on damage to property and damage to the product
Bosch Rexroth AG, Edition 01.2021, RE 30239-B
3 General notes on damage
to property and damage to
the product
NOTICE
High voltage!
The digital axis control may be damaged.
▶ Wire the digital axis control only when 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 the digital axis control.
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 the power supply unit and cable.
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 device can be thermally destroyed.
▶ Adhere to the specification in the data sheet.
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.
4 Scope of delivery
The scope of delivery includes:
• Digital axis control VT-HMC...1X
• Mating connectors for XD1 and XG20/XG21:
– XD1: Weidmüller BLZF 3.50/03/180F SN BK...
– XG20/XG21: Weidmüller B2CF 3.50/30/180 LH SN BK...
– Keying elements: Weidmüller B2L/S2L 3.50 KO BK BX
Accessories such as cables and mains adaptor and cable sets are not included
in the scope of supply, but have to be ordered separately. See also chapter 7.2
“Recommended accessories” on page 17.

RE 30239-B, Edition 01.2021, Bosch Rexroth AG
About this product | Digital axis control VT-HMC...1X 13/36
5 About this product
5.1 PERFORMANCE DESCRIPTION
The VT-HMC...1X is a digital axis control with integrated axis controller and
optional PLC functionality in accordance with IEC 61131-3. The VT-HMC...1X
can be used to realize position/pressure/force/velocity controls, alternating
control (position/pressure) as well as optionally synchronization (position
synchronization master/slave, average, min/max and force synchronization). For
the synchronization function you require the optional SD card.
For implementing project planning and parameterizing the VT-HMC...1X the
engineering tool IndraWorks is provided.
5.2 PRODUCT DESCRIPTION
With regard to immunity to interference, resistance to mechanical vibration and
shock as well as climate resistance, the VT-HMC...1X is designed for use in harsh
industrial environments.
The VT-HMC...1X comprises three configurable controller variants:
• Position control
• Force control
• Pressure control
• Alternating control (position/pressure or force)
• Velocity control
• Position synchronization master/slave, average, min/max (optional)
• Force synchronization (optional)
These allow, among others, the following operating modes to be implemented:
• Direct valve control
• Drive-controlled position control
• Drive-controlled positioning
• Positioning block mode
Command values are provided via the bus interfaces (XF20/XF21 or XF30), via the
analog interface (XG20/XG21) or alternatively via an internal PLC program.
The actual value signals are fed back to the higher-level control either via the bus
interfaces (XF20/XF21 or XF30) or the analog/digital interface (XG20/XG21).
Parameterization and diagnostics as well the implementation of the project are
carried out using the PC software IndraWorks Ds, which is available for the
individual control types as download on the Internet at www.boschrexroth.com/
hmc. It allows you to parameterize the VT-HMC...1X individually and adapt it to the
requirements of your axes. Moreover, IndraWorks supports you in commissioning
and diagnostics and provides for convenient data administration on the PC. A
precondition for this is the PC operating system Windows 7 or higher.
For creating a user-specific PLC program, the engineering tool IndraWorks MLD
has to be used. IndraWorks MLD has to be ordered separately.
Controller variants
Operating modes
Command values and
actual values
Engineering tool
IndraWorks

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The digital control electronics features comprehensive monitoring functions, fault
detection and more.
• Undervoltage
• Communication errors
• Cable break for analog sensor inputs and digital position measuring system
• Short-circuit monitoring for analog/digital outputs
• Monitoring of the microcontroller (watchdog)
• Temperature of electronics
• Overcurrent of 24 V sensor voltages and digital outputs
The measuring system of the hydraulic axes is incremental or absolute (SSI),
analog ±10 V and 4 to 20 mA.
The VT-HMC...1X is provided with a slot for an SD memory card. It can be used for
saving the PLC program and other optional data. Only SD memory cards with SPI
bus interface up to max. 4 GB are supported. When the control is switched on, the
card must be plugged, otherwise it is not recognized. Not-FAT-formatted cards are
automatically formatted (FAT32).
For process interfacing, the digital axis control VT-HMC...1X is equipped with
analog and digital inputs/outputs and with various bus systems. For more complex
machines it is useful to employ a higher-level control that, in conjunction with the
VT-HMC...1X, holistically controls the motion sequence of the machine and
monitors it in view of safety.
Main fields of application of the VT-HMC...1X are machine tools, plastics machines,
special machines, presses, and transfer systems.
The technology functions comprise:
• Sequence programming
• Positioning
• Pressure/force control
• Differential pressure control
• Position synchronization master/slave, average, min/max (optional)
• Force synchronization (optional)
The basis for function of the VT-HMC...1X is the creation of application-specific
parameter sets and, if required, user programs. These data are generated on the
PC and sent via TCP/IP to the VT-HMC...1X. The combination of user program and
parameter sets is called project.
The technical data, operating conditions and operating limits of the axis control
VT-HMC...1X can be found in the data sheet.
Monitoring
Measuring system
Memory card
General information

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5.3 IDENTIFICATION OF THE PRODUCT
At the side of the VT-HMC...1X there is a label showing the most important data.
1 Word mark
2 Country of origin
3 Material short text
4 Plant
5 Material number
6 Date of production
7 Serial number
23
1
4 5 67
6 Transport and storage
There are no special transport instructions for this product. You must, however,
observe the notes in Chapter 2. “General safety instructions” and comply with the
ambient conditions for storage and transport which are detailed in the technical
data of data sheet 30239.
6.1 STORING THE VT-HMC...1X
Proceed as follows in order to prepare the VT-HMC...1X for storage and further
use:
▶ Use the original packaging for storage.
▶ Comply with the admissible storage temperature range of +5 °C to +40 °C.
▶ Protect the VT-HMC...1X against dust, humidity and UV radiation

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7 Installation
NOTICE
Risk of short-circuit!
Water may condense within the housing!
▶ Let the VT-HMC...1X acclimate itself for several hours, as otherwise water may
condense in the housing.
The housing of the VT-HMC...1X is provided with cooling slots. According to the
specified protection class, dirt and fluids may easily enter and cause malfunction
and short-circuit! The reliable operation of the VT-HMC...1X is thus no longer
ensured.
▶ When working on the VT-HMC...1X, observe strictest cleanliness and make
sure that no fluids will enter the housing.
Major potential differences!
Risk of destruction of the VT-HMC...1X by plugging or unplugging connectors
under voltage.
▶ Switch off power supply to the relevant system part before installing the unit
or plugging or unplugging connectors.
7.1 INSTALLATION CONDITIONS
▶ When installing the VT-HMC...1X, strictly adhere to the ambient conditions
specified in data sheet 30239.
NOTICE:
▶ 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 20. Avoid contact with the hydraulic fluid.
The VT-HMC...1X is intended for snapping onto DIN mounting rails in the control
cabinet. The dimensions of the individual variants are given in data sheet 30239.
▶ Before commissioning, make sure that all the seals and plugs of the plug-in
connections are correctly installed to ensure that they are leak-proof and no
fluids or foreign particles can enter the product.
▶ Install the VT-HMC...1X vertically. To ensure sufficient venting, the cooling slots
at the top and bottom have to be at least 2 cm away from covers and walls.

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7.2 RECOMMENDED ACCESSORIES
We recommend the use of the following accessories for connecting the axis
control VT-HMC...1X. These accessories are not included in the scope of delivery,
but can be ordered separately from Bosch Rexroth:
Tabelle 6: Accessories
Designation Material no.
CONNECTION PLUG 6ES7972-0BA42-0XA0 for port XF30 (PROFIBUS) R901312863
PLUG SET VT-HMC...-1X/M...*ET R961011116
SERVICE PACKAGE VT-HMC...-1X/M...shielding *ET R961011117
SD MEMORY CARD XA-SD=1 (1 GByte) R911173844
SD-card for synchronization, VT-SD-HMC-SYNC-000-001-000-000 R901512467
Connection cable PC VT-HMC (RJ45, XF20 or XF21) R911321548
Commissioning software IndraWorks Ds of version 14V12 or higher (without PLC functionality)
Commissioning software IndraWorks MLD of version 14V18 or higher
IndraWorks Ds can be used only for parameterization and diagnostics.
IndraWorks MLD is required, if the PLC functionality according to IEC 61131-3
is to be used additionally.
The commissioning software IndraWorks MLD is subject to licensing. For
further information, please visit www.boschrexroth.com/hmc.
7.3 INSTALLING THE VT-HMC...1X
▶ Lay cables and lines so that they cannot be damaged and no one can trip over
them.
▶ By snapping the housing of the VT-HMC...1X on a conductive and earthed
mounting rail, the earth connection is established with the rear wall of the
control cabinet. This constitutes the RF grounding of the VT-HMC...1X.
▶ 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.
▶ Before installing the device, note the details given on the nameplate. If
nameplates are no longer visible or legible after installation you will have the
data at hand at any time.
Mount the VT-HMC...1X as follows on a mounting rail in the control cabinet:
1. Disconnect the relevant system part from the power supply.
2. Snap the back panel of the VT-HMC...1X carefully into position on the DIN
mounting rail. Mechanical contact points on the rear panel of the VT-HMC...1X
ensure firm seating on the DIN mounting rail and the connection of the housing
to the grounding system of the control cabinet.

18/36 Digital axis control VT-HMC...1X | Installation
Bosch Rexroth AG, Edition 01.2021, RE 30239-B
Fig. 1: Mounting of the VT-HMC...1X on the DIN mounting rail
Should the spring-loaded latch not snap in automatically, it can be released using
a screwdriver. After having positioned the latch, let it spring back into the engaged
position.
Observe the following notes on mounting the axis control VT-HMC...1X
▶ For mounting, observe the notes on applicable standards and operating
conditions in the data sheet.
▶ 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 direct installation of the VT-
HMC..1X 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.
▶ Execute the installation so that when differential inputs are used, both inputs
are always activated or deactivated simultaneously.
▶ Do not use any silicone-containing sealants, adhesives or insulating agents.
▶ The system ground is an essential, integral part of EMC protection of the axis
control. Here, interference, which is transported to the axis control 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.
▶ Ensure maintenance-friendly installation, i.e. simple access to the connection
lines. Ensure free access to the connection side.
7.3.1 Place of installation
The VT-HMC...1X should not be installed next to power electronics (e.g. frequency
converters, etc.). The power supply unit of the VT-HMC...1X should be installed as
close to the VT-HMC...1X as possible.
NOTE: UV radiation!
Extended exposure to UV radiation can lead to discoloration.
▶ Do not install the VT-HMC...1X at a place exposed to direct sunlight.

RE 30239-B, Edition 01.2021, Bosch Rexroth AG
Installation | Digital axis control VT-HMC...1X 19/36
7.3.2 Power supply
▶ Keep the connection as short as possible and install supply and return
conductors (+24 V/GND) together. For voltage, see data sheet 30239.
▶ Install power cables consisting of two individual wires (voltage supply) in
parallel or as twisted cable.
7.3.3 Supply of external components
For the supply of a 24-V encoder, the input voltage of the VT-HMC...1X at XD1 must
meet the requirements of the encoder (e.g.: 24 V±5 %, residual ripple <500 mV).
Analog components such as pressure cells can be supplied via the analog voltage
output Vencoder_ANA at XG20/XG21.
Prerequisite: The supply of the VT-HMC...1X meets the requirements of the
pressure cell. For further notes on currents, etc., please refer to data sheet 30239.
7.3.4 Shielding
For signal cables, use only cables with a copper braid shield. Connect the cable
shield on one side on a large area using a grounding bar. For this, mount the
grounding bar as close as possible to the VT-HMC...1X and strip the cable sheath
around the cable at the appropriate position. Observe the installation notes given
in the data sheet of the grounding bar (e.g. from Wago: U-shaped busbar, art. no.
790-191, shield clamping saddle, art. no. 790-116).
Fig. 2: Shielding of the VT-HMC...1X

20/36 Digital axis control VT-HMC...1X | Installation
Bosch Rexroth AG, Edition 01.2021, RE 30239-B
7.3.5 General notes on shielding
▶ 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, use a terminal block with shield busbar.
▶ Cables should only have the number of wires actually required. If this is
impossible, connect unused wires with each other and connect them to ground
on one side in the control cabinet.
Tabelle 7: Recommended cable variants
Tabelle 8: Clamping range, rated connection
Min. Max.
Single-wire 0.2 mm² 1.5 mm²
Finely-stranded 0.2 mm² 1.5 mm²
The length to be stripped is 10 mm each.
Interface Cable type Max,
length [m]
Minimum cross-section
[mm2]
Remarks
Incremental * 50 0.25 for signal cable
1.0 for supply cable
* = according to the instructions of the
sensor manufacturer, at least twisted pair,
single shield
SSI * 50 0.25 for signal cable
1.0 for supply cable
* = according to the instructions of the
sensor manufacturer, at least twisted pair,
single shield
EnDat2.2 * 50 0.25 for signal cable
1.0 for supply cable
* = according to the instructions of the
sensor manufacturer, at least twisted pair,
single shield
Digital in/out In the control
cabinet: Single
wires
outside the control
cabinet: Shielded
30 0.25 to 1.0
Analog in
voltage
Twisted pair,
shielded
50 0.25 to 1.0
Analog in
current
Twisted pair,
shielded
50 0.25 to 1.0
Analog out
voltage
Shielded 50 0.25 to 1.0
Analog out
current
Shielded 50 0.25 to 1.0
Ethernet CAT5e 1: 1 connection cable
with field buses (PROFINET, EtherNet/
IP...) according to specification of the user
organization
Supply In the control
cabinet: Single
wires
outside the control
cabinet: Shielded
50 0.25 to 1.0
PROFIBUS * * * * = according to the specification of the
PROFIBUS user organization (standard)