Bosch Rexroth VT-MRMA1-1 Operating Instructions Manual Download Page 1

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Operating instructions
RE 30214-B/03.2019

Replaces: 03.2017
English

VT-MRMA1-1

Analog amplifier module

Summary of Contents for Rexroth VT-MRMA1-1

Page 1: ...Operating instructions RE 30214 B 03 2019 Replaces 03 2017 English VT MRMA1 1 Analog amplifier module ...

Page 2: ...t 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 It may not be reproduced or given to third parties without its consent An example configuration is shown on the title page The delivered product may therefore differ from the product w...

Page 3: ...odule 13 5 2 Product description 13 5 2 1 Components that can be connected 13 5 2 2 Function 14 5 2 3 Functions within the amplifier module 15 5 2 4 Controller and functions closely related to the controller 16 5 2 5 Actual value preparation 17 5 2 6 Monitoring functions 19 5 2 7 Measuring point changeover switch 15 22 5 3 Identification of the product 22 6 Transport and storage 23 6 1 Storing the...

Page 4: ...ample 41 9 Operation 43 10 Maintenance and repair 43 10 1 Cleaning and care 43 10 2 Maintenance 43 10 3 Repair 43 11 Demounting and replacement 44 11 1 Preparing demounting 44 11 2 Demounting 44 11 3 Preparing the components for storage or further use 44 12 Disposal 44 12 1 Environmental protection 44 13 Extension and conversion 44 14 Troubleshooting 45 14 1 How to proceed for troubleshooting 45 1...

Page 5: ...tation 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 these are explained in the following sections 1 3 1 Safety instructions This documentation contains safety notes in Chapter 2 6 Product specific safety instructions and Chapte...

Page 6: ...sult in minor or moderate injury NOTICE Damage to property The product or the environment can be damaged 1 3 2 Symbols The following symbols refer to notes which are not relevant to safety but increase the legibility of the documentation Table 3 Meaning of symbols Symbol Meaning If this information is disregarded the product cannot be used or operated in an optimum manner Individual independent ac...

Page 7: ... use Any use other than described in the section Intended use is considered as improper and is therefore not permitted For damage resulting from improper use Bosch Rexroth AG will not bear liability The risks arising from improper use lie exclusively with the user Improper use includes but is not limited to the following foreseeable misuse operating the analog amplifier module outside the specifie...

Page 8: ...ions unintended operational states may occur in the application that can cause personal injury and or damage to property Therefore use the product only in safety relevant applications such as in explosion protection areas or in safety related parts of a control functional safety if this use is expressly specified and permitted in the documentation You may commission the product only when it has be...

Page 9: ... 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...

Page 10: ...e configuration delivered Warranty claims will be rejected in the case of improper installation commissioning and operation as well as in the case of use not in accordance with the intended purpose and or improper handling NOTICE High voltage Risk of damage to the analog amplifier module Wire the analog amplifier module only when disconnected from the power supply Overloading Risk of overloading a...

Page 11: ...AG 4 Scope of delivery The scope of delivery includes Analog amplifier module Accessories such as cables and mains adaptor and cable sets are not included in the scope of delivery but have to be ordered separately See also chapter 7 3 Recommended accessories on page 26 ...

Page 12: ...d value input Actual valve position value with cable break detection feature and electronic limit stops Position controller Characteristic curve correction for valve position command value Output stage with clocked control voltage for the valve actuator 24 V inputs outputs for operational states enable ready for operation position command value reached Configurable actual pressure value input 0 5 ...

Page 13: ... values above or below limit values can be diagnosed via outputs A or B of the pressure switch 5 2 Product description 5 2 1 Components that can be connected The following components are to be connected to the analog amplifier module for data sheets see chapter 1 2 Required and supplementary documentation on page 5 ZDRS 6VP 1X Proportional pressure reducing valve with electromotive adjustment elem...

Page 14: ... 3 sensor sensor A wp wp enable xp xp power supply L0 0V 5 6 7 1 2 12 11 wp xp xs ws t 7 5 V 7 5 V M0 Zp xp Gp EN Gw Zw S1 7 1 8 S1 1 1 6 xs EN Zx Gx S2 1 2 9 L0 L0 10 9 16 15 8 4 3 13 14 DC DC 1 2 3 11 9 14 7 8 5 6 4 3 2 10 12 15 13 1 0 4 5 1 Pressure command value preparation 2 Pressure command value feedforward 3 Ramp generator 4 Pressure command value attenuator 5 Linearization of valve charac...

Page 15: ...ial input pressure command value always activate or deactivate both inputs simultaneously Make sure that the ground of the pressure command value wP terminal 5 has the same potential as the ground L0 terminal 11 of the power supply unit if required use an equipotential bonding strip to suppress disturbance more effectively For carrying out zero point compensation using zero point potentiometer ZW ...

Page 16: ...ressure value of 80 bar Table 10 Linearization Purpose Effect Setting Compensation of a non linear valve characteristic curve Generates the valve position command value from the pressure command value None Table 11 Linearization Purpose Effect Setting Internal limitation of the valve position command value irrespective of the pressure command value applied Safety limitation of the valve stroke to ...

Page 17: ...An enable cable break corresponds to a 0 V signal When the enable is not set adjusting the valve is impossible positioning control is inactive but the positioning signal position command value reached and the pressure switch are active The pressure command value therefore also has to be applied when the enable signal is missing Make sure that the enable signal is only given when a new actuating pr...

Page 18: ... supply cable ground of the pressure transducer Detection of undervoltage at terminal 2 xp 0 35 V If one of the faults above is detected both pressure signals A and B drop to 0 V and the red LED on the front panel of the amplifier module lights up In the event of a cable break of the actual pressure value cable the further operation of the closed loop valve position control is not affected Table 1...

Page 19: ...responding absolute switching thresholds results in an envelope curve in the form of a funnel see figure above As long as the actual pressure value remains within the funnel limits at a given pressure command value both pressure switch signals A and B are HIGH If the pressure exceeds or falls below one of the two limits actual pressure value is in the gray area the corresponding pressure switch si...

Page 20: ...nt the green LED for readiness for operation lights up on the front panel and the ready for operation output is connected to the 24 V operating voltage After the fault was rectified the electronics can be re activated by resetting and then setting the enable again The protective motor circuit is an integral part of the fault detection feature see page 20 Table 20 Protective motor circuit Purpose E...

Page 21: ...tting Monitoring of the system deviation of the valve position controller Position command value reached terminal 9 24 V High as long as the following is valid wS xS 5 Otherwise terminal 9 is connected to 0 V LOW None Information about the state of closed loop position control Synchronization with the higher level sequence program When the ramp is set the signal for position command value reached ...

Page 22: ...low Selection of measuring points by means of measuring point selector switch on the front panel Measuring points see also chapter 8 1 3 Measuring signal and measuring point selector switch on page 38 Pressure command value wP Actual pressure value xP Valve position command value wS Actual valve position value wS Ramp time up t Ramp time down t 5 3 Identification of the product At the side of the ...

Page 23: ... instructions and comply with the ambient conditions for storage and transport which are detailed in the technical data of data sheet 30214 6 1 Storing the VT MRMA1 Proceed as follows in order to prepare the analog amplifier module for storage and further use Only use the original packaging for storage Observe the permissible storage temperature range see data sheet 30214 Protect the VT MRMA1 from...

Page 24: ...vapors etc and do not expose the device to these substances Generally rule out any deposits according to protection class IP 20 Cables lying around Risk of stumbling Lay the cables and lines so that they cannot be damaged and no one can stumble over them NOTICE Major differences in potentials Risk of destruction of the VT MRMA1 by plugging or unplugging connectors under voltage Switch off power su...

Page 25: ...ce to the right and to the left of at least 25 mm By providing a minimum clearance of 50 mm up and down ensure sufficient air circulation to the venting slots in the housing All cables e g for command values pressure transducer feedback values enable signals have to be rated so cable thickness length that the operating data and operating ranges input voltage range power consumption are adhered to ...

Page 26: ...t the installation position provides ease of maintenance i e unhindered access to connection lines Ensure free access to the connection side The cable ends should be sufficiently long in order that the amplifier can also be removed from the DIN rail when connected Before installing the device note the details given on the nameplate If nameplates are no longer visible or legible after installation ...

Page 27: ...to the connection of the power supply unit see chapter 7 6 2 on page 29 valve see chapter 7 6 3 on page 29 pressure transducer see chapter 7 6 4 on page 30 higher level control see chapter 7 6 5 on page 31 7 6 Overview of connections The binding documents for the electrical connection are always the wiring diagrams and working instructions of the machine manufacturer Any compulsory components such...

Page 28: ...ommand value input 7 Enable 24 V input Activation of position controller and output stage Control 8 xS Input Actual position value of the valve Output signal of the position transducer Position transducer in the valve 9 Position command value reached 24 V output High active High when valve position command value and actual valve position value are identical and ramp completed Control 10 Ready for ...

Page 29: ...nt Explanation 12 11 10 9 11 Ground or L0 0V Reference potential of operating voltage UB 12 UB Operating voltage 7 6 3 Connection of the pressure reducing valve 5 terminal connections on the amplifier module are reserved for the connection to the pressure reducing valve The terminal connections are assigned to the following components of the pressure reducing valve DC motor 2 supply connections Po...

Page 30: ...l position value Terminal 8 3 sensor Terminal 3 4 motor Terminal 16 5 motor Terminal 15 PE n c 7 6 4 Connection of actual pressure value cables pressure transducer A pressure transducer e g HM20 2X is used for acquiring the actual pressure value It is mounted directly to the pressure reducing valve Table 29 Terminal assignment of actual pressure value input Terminal Pin Assignment Explanation 1 2 ...

Page 31: ...n transducer and pressure command value cables every individual wire jamming of the actuator drive and positive feedback due to incorrect motor wiring cable break of a motor cable 16 15 14 13 13 A Monitoring of actual pressure value for falling below the threshold 14 B Monitoring of actual pressure value for exceeding the threshold 7 6 6 Plug in screw connectors The amplifier module offers the pos...

Page 32: ...xroth AG VT MRMA1 1 RE 30214 B 03 2019 Fig 11 Plug in screw connectors Lever plug in screw connector out by means of a screw driver Mating connector in housing module Plug in screw connector 4 terminals Terminal Connection cables ...

Page 33: ...n example of pressure adjustment can be found in chapter 6 6 8 1 Adjustment measuring and indicator elements The following setting elements are available 2 DIL switches see chapter 8 1 1 8 potentiometers see chapter 8 1 2 1 measuring point selector switch and 2 test jack outputs see chapter 8 1 3 3 LEDs front panel see chapter 8 1 4 8 1 1 DIL switches The amplifier module is provided with 2 DIL sw...

Page 34: ... Pull housing module 1 with printed circuit board from housing module 2 Slightly tip the screw driver in order to press the fixing clamp into the module At the same time carefully pull the front out of the module housing Block the screw driver Caution Risk of injury Press the screw driver onto the fixing clamp connecting element between module housing 1 and module housing 2 Bottom Top 8 7 6 5 4 3 ...

Page 35: ...esholds can be adjusted separately see table below Absolute switching thresholds They are defined in and refer to the nominal value maximum pressure of the selected pressure level The setting always refers to both upper and lower absolute switching thresholds S2 10 has no function Setting of the DIL switches S1 OFF 8 7 6 5 4 3 2 1 ON 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 OFF ON OFF ON OF...

Page 36: ...F 3 0 0 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1 9 10 ON 8 7 6 5 4 3 2 1 9 10 OFF ON 8 7 6 5 4 3 2 1 9 10 OFF ON 8 7 6 5 4 3 2 1 9 10 OFF 6 10 15 ON OFF ON OFF ON OFF 10 20 30 10 20 30 ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON 8 7 6 5 4 3 2 1 9 10 OFF Up...

Page 37: ...31 Adjustment ranges of the potentiometers Designation of potentiometer Relevant signal Meaning Adjustment range Gw Pressure command value Amplitude attenuator 0 to 130 Zw Zero point calibration 30 GP Actual pressure value Sensitivity of actual pressure value 90 to 120 ZP Zero point calibration 5 GX Actual valve position value Actual valve position value sensitivity 90 to 120 ZX Zero point calibra...

Page 38: ... v Table 32 Measuring signals Switch position Measuring point Measuring signal at test jack v 0 Pressure command value wP 0 0 V 100 10 V 1 Actual pressure value xP 0 0 V 100 10 V 2 Valve position command value wS 0 0 V 100 10 V 3 Actual valve position value xs 0 0 V 100 10 V 4 Ramp times up t 10 mV to 10 V 5 Ramp time down t 10 mV to 10 V Fixed potentials for orientation 6 No function 0 V 7 No fun...

Page 39: ...1 page 33 2 Connect amplifier module 3 Pressure command value Adjust pressure command value zero point Zw 4 Set ramp times Internal by means of amplifier module see ramp generator 3 on page 15 External via machine control 5 Set maximum value of pressure command value Zw The following additional step is required only in the case of insufficient accuracy Step Signal Measure 6 Actual pressure value o...

Page 40: ...nt Setting 1 Pressure command value zero point 0 Zw v 1 The external pressure command value feedforward to 0 2 Set measuring point selector switch to 0 When adjusting Zw potentiometer Gw must not be turned to the left hand limit stop 0 3 Use zero point potentiometer Zw to set the measuring signal at test jack v to 0 V 5 mV 0 2 Maximum value of pressure command value 0 Gw v 1 Calibrate the zero poi...

Page 41: ...ressure value signal voltage between terminal 2 and 1 to 100 of the nominal pressure value Pressure transducer Output signal 100 Voltage terminal 2 and 1 0 5 5 V output 5 00 V 5 00 V 4 20 mA output 20 mA 2 00 V Rload 100 Ω 6 Set the measuring point selector switch to 1 7 Use potentiometer GP to calibrate the measuring signal at test jack v 10 00 V 5 mV 6 Actual pressure value 1 Check the two worki...

Page 42: ...ctual pressure value for being within the selected limits For the system this results in the following signal and adjustment sequence Table 35 Signal and adjustment sequence Measure Signal and adjustment sequence Terminal Status Query of state signals Output ready for operation 10 High Output position command value reached 9 High Outputs of pressure switch signals A and B 13 14 High Functional tes...

Page 43: ...on Loss of function and short circuit due to the ingress of contaminants and humidity When working on the analog amplifier module VT MRMA1 observe strictest cleanliness Only use a dry and dust free cloth for cleaning 10 2 Maintenance In view of a long service life and operability you should include the following activities in your maintenance schedule for the analog amplifier module Check all term...

Page 44: ...r further use Proceed as follows in order to prepare the VT MRMA1 1 for storage and further use Only use the original packaging for storage Observe the permissible storage temperature range specified in data sheet 30214 Protect the analog amplifier module from dust and humidity 12 Disposal 12 1 Environmental protection Careless disposal of the VT MRMA1 1 and the packaging material could lead to po...

Page 45: ...stem machine system electrics control or on the product If yes Which Was the product or machine used as intended How becomes the malfunction apparent Try to get a clear idea of the error cause If possible ask the direct machine operator 14 2 Erroneous states and error diagnostics Various monitoring functions are active in the amplifier module When no error is present the green ready LED is ON 24 V...

Page 46: ... off The green ready LED is OFF Ready for operation and Position command value reached become inactive 0 V Replace cable Short circuit of the position transducer supply cable with L0 Check position transducer connections Function of the valve actuator Attention Faults in the valve actuator are not recognized by the internal fault detector before the pressure command value is re adjusted Jamming of...

Page 47: ... service boschrexroth de Outside Germany you will find service subsidiaries in your vicinity on the Internet at www boschrexroth com Bosch Rexroth AG Zum Eisengießer 1 97816 Lohr am Main Germany Phone 49 0 9352 40 30 20 E mail my support boschrexroth de The addresses of our sales and service network and sales organizations can be found at www boschrexroth com addresses Contact for service and spar...

Page 48: ...sal 44 E Electronic limit stop 21 Enable function 17 Environmental protection 44 Erroneous states und error diagnostics 45 Extension and conversion 44 F Fault detection 20 Fine tuning 40 Function 14 Functions 15 I Identification of the product 22 Improper use 7 Installation 26 Installation conditions 25 Intended use 7 L LEDs 38 Linearization of valve characteristic curve 16 M Maintenance 43 Measur...

Page 49: ...cognition of position command value reached 21 Repair 43 Replacement 44 Required documentation 5 S Safety instructions 7 general 8 product specific 8 Signal word 5 Scope of delivery 11 Storage 23 Symbols 6 T Technical data 46 Terminal assignment 28 Terminal assignment of actual pressure value input 30 Terminal assignment to the pressure reducing valve 29 Terms 6 Transporting 23 Troubleshooting 45 ...

Page 50: ...50 52 Alphabetical index Bosch Rexroth AG VT MRMA1 1 RE 30214 B 03 2019 ...

Page 51: ...Alphabetical index 51 52 RE 30214 B 03 2019 VT MRMA1 1 Bosch Rexroth AG ...

Page 52: ... Rexroth AG Industrial Hydraulics Zum Eisengießer 97816 Lohr a Main Germany Phone 49 0 9352 40 30 20 my support boschrexroth de www boschrexroth com Subject to revision Printed in Germany RE 30214 B 03 2019 ...

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