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Displacement transducers

MSX-E3701-DIO

3

Displacement transducers

In this chapter, the properties of the different displacement transducers are described in more detail.
This should help you to find the right transducer for your measuring system and to identify and
prevent possible measuring errors in advance.

3.1

Inductive transducers

Inductive transducers are used for precise measurement of a defined distance. They are displacement/
voltage sensors, whose output voltage changes linearly along with the moving magnetic core (ferrite).

The magnetic core moves according to a straight line in a transformer, which consists of a central

primary coil and two external secondary coils (cylindrical windings). The power buffer provides an AC
voltage source to the primary coil. The secondary voltage changes according to the position of the
magnetic core.

3.1.1

Half-bridge transducers

A half-bridge transducer consists of two inductive coils (windings). These are fed directly with two
sinusoidal voltage signals, i. e. a positive and a negative oscillator voltage.
A measuring bolt moves along the two coils with a ferromagnetic core. Depending on its position, this
core changes the voltages in the two coils. The measuring bolt thus functions like a variable voltage
distributor. The change in voltage at the coils results in the sinusoidal measurement signal to be
evaluated.

Fig. 3-1: Half-brige transducer

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Содержание MSX-E3701-DIO

Страница 1: ...DIN EN ISO 9001 2008 certified Edition 02 02 11 2015 TECHNICAL DESCRIPTION MSX E3701 DIO Ethernet system for length measurement ...

Страница 2: ... disclosure of this information for use by third parties is not permitted unless this right has been granted by the product licence issued Non compliance with this could lead to civil and criminal proceedings ADDI DATA software product licence Please read this licence carefully before using the standard software The customer is only granted the right to use this software if he she agrees with the ...

Страница 3: ...for it Observe the instructions of this manual Make sure that you do not forget or skip any step We are not liable for damages resulting from the wrong use of the Ethernet system Pay attention to the following symbols NOTICE Designates hints and other useful information NOTICE Designates a possibly dangerous situation If the instructions are ignored the Ethernet system the PC and or peripherals ma...

Страница 4: ...ucer properties 14 4 Function description Transducer inputs 15 4 1 Pin assignment 15 4 2 Acquisition principle 16 4 3 Calibration 16 4 4 Diagnostic function 25 5 Function description Digital inputs outputs 26 5 1 Pin assignment 26 5 2 SOAP Modbus API 26 5 3 Connection examples 27 6 Web interface Quick access to the MSX E system 28 6 1 Menu item I O Configuration 28 6 1 1 Digital I O tab 28 6 1 2 T...

Страница 5: ... DIO Block diagram 12 Fig 3 1 Half brige transducer 13 Fig 3 2 LVDT transducer 14 Fig 4 1 MSX E3701 DIO Acquisition principle 16 Fig 4 2 ConfigTools Main window 17 Fig 5 1 Pin assignment Digital I O 37 pin D Sub male connector 26 Fig 5 2 Connection example Digital inputs 24 V 27 Fig 5 3 Connection example Digital outputs 24 V 27 Fig 6 1 Web interface XT 370x MIX option 28 Fig 6 2 I O configuration...

Страница 6: ...ig 7 20 Hardware trigger with One Shot d 43 Fig 7 21 Hardware trigger with Sequence a 43 Fig 7 22 Hardware trigger with Sequence b 44 Fig 7 23 Hardware trigger with Sequence c 45 Fig 7 24 Data server frame configuration Auto refresh mode 46 Fig 7 25 Data server frame configuration Sequence mode 46 Fig 7 26 Acquisition Data server frame format 47 Fig 8 1 MSX E3701 DIO Dimensions 49 Fig 8 2 MSX E370...

Страница 7: ...am 3 Information on inductive displacement transducers 4 Function description transducer inputs including pin assignment 5 Function description digital inputs outputs including pin assignment and connection examples 6 Description of the function specific pages of the MSX E web interface 7 Description of the acquisition modes Auto refresh and Sequence modes 8 List of technical data and limit values...

Страница 8: ...e used as electrical equipment according to the Low Voltage Directive 2006 95 EC 1 1 3 Limits of use All safety information and the instructions in the manuals must be followed to ensure proper intended use Uses of the Ethernet system beyond these specifications are considered as improper use The manufacturer is not liable for damages resulting from improper use The Ethernet system must remain in ...

Страница 9: ...ot be opened It may only be opened by persons who have been authorised by ADDI DATA 1 3 User 1 3 1 Qualification Only persons trained in electronics are entitled to perform the following works Installation Commissioning Use Maintenance 1 3 2 Country specific regulations Do observe the country specific regulations regarding the prevention of accidents electrical and mechanical installations Electro...

Страница 10: ... can send them to us by e mail or call us E mail info addi data com Phone 49 7229 1847 0 Manual and software download from the Internet The latest versions of the technical manual and the standard software for the Ethernet system MSX E3701 DIO can be downloaded for free at www addi data com NOTICE Before using the Ethernet system and in case of malfunction during operation check if there is an upd...

Страница 11: ... can be used in the operating temperature range from 0 C to 60 C and is equipped with numerous protective circuits The Status LED provides for a quick and easy error diagnosis The electronics are no longer in the computer itself but in an external housing connected to the computer via Ethernet As the Ethernet system is attached directly to the signal generator measuring point or in direct vicinity...

Страница 12: ...Brief description MSX E3701 DIO www addi data com 12 2 2 Block diagram Fig 2 1 MSX E3701 DIO Block diagram ...

Страница 13: ... which consists of a central primary coil and two external secondary coils cylindrical windings The power buffer provides an AC voltage source to the primary coil The secondary voltage changes according to the position of the magnetic core 3 1 1 Half bridge transducers A half bridge transducer consists of two inductive coils windings These are fed directly with two sinusoidal voltage signals i e a...

Страница 14: ... the transducer The primary coil is fed by two sinusoidal voltage signals i e a positive and a negative one whereas both secondary coils switched in phase opposition produce an electrical signal proportional to the measured displacement Fig 3 2 LVDT transducer 3 2 Transducer properties In the ConfigTools program in the User database the following properties of a transducer can be defined Name Type...

Страница 15: ...Ethernet system MSX E3701 DIO only one type of transducer can be connected to one system Exception The option XT 370x MIX enables the connection of up to 16 different HB or LVDT transducer types per system For this the frequency and the input resistance of the transducers must be equal Table 4 1 Pin assignment Transducer inputs Half bridge LVDT Pin No Female connector 5 pin M18 Female connector 5 ...

Страница 16: ...t signals are led over a multiplexer 16 1 The measurement signal passes through a software programmable amplifier Then the signal is led over an analog low pass filter and acquired by a 24 bit ADC Parallel to the measurement signal the supply signal of the transducer is monitored via a second input at the ADC Fig 4 1 MSX E3701 DIO Acquisition principle 4 3 Calibration The gain and the offset error...

Страница 17: ...bration of the transducers is carried out in one run then A sample for the calibration of an MSX E3701 DIO also with the XT 370x MIX option is included in delivery of the respective system On the following pages the calibration of three Solartron LVDT transducers with different measuring ranges and sensitivity is described 1 In the ConfigTools main window click on the action button Transducer Cali...

Страница 18: ...w addi data com 18 The following window is displayed 2 Click on the Transducers button In the following window the transducer types of the MSX E database action button Transducer Database are listed 3 Select the transducers to be calibrated and click on OK ...

Страница 19: ...ansducer inputs MSX E3701 DIO www addi data com 19 4 Click on the Channels button the following window via the button Current Configuration Recent Calibration the In configuration used last for a calibration can be displayed ...

Страница 20: ...ddi data com 20 5 Assign the transducers to be calibrated to the corresponding channels and click on OK Assigning the transducers to the channels is also possible with the software function MX370x__SetMixTransducerList 6 Click on Start to start the calibration ...

Страница 21: ...of the MSX E system is calibrated r of the transducers to be calibrated is omatically In this example channel 3 is calibrated first 7 For the transducer connected to channel 3 set the current position to 0 mm and click on Next T defined aut hen the calibration of the transducers is started The orde ...

Страница 22: ...inputs MSX E3701 DIO www addi data com 22 8 For the transducer connected to channel 3 set the required position to 2 5 mm and click on Next 9 For the transducer connected to channel 1 set the current position to 0 mm and click on Next ...

Страница 23: ...inputs MSX E3701 DIO www addi data com 23 10 For the transducer connected to channel 1 set the required position to 1 mm and click on Next 11 For the transducer connected to channel 2 set the current position to 0 mm and click on Next ...

Страница 24: ...ansducer inputs MSX E3701 DIO www addi data com 24 12 For the transducer connected to channel 2 set the required position to 10 mm and click on Next The calibration of the transducers connected to channels 1 to 3 is finished ...

Страница 25: ...ircuit for example If such an error occurs the respective input is switched off As soon as the short circuit has been eliminated a rearm has to be carried out to reactivate the input see also Chapter 6 2 2 This means that the input is set to the status value that was programmed before the error occurred A new value can only be defined after the rearm event 4 E ...

Страница 26: ...2 SOAP Modbus API If you configure and control the digital I O of the MSX E3701 DIO via SOAP or Modbus you have to use the software functions starting with Ext Example A digital output can be set by the function MX370x__ExtDigitalIOWriteChannel ulChannel ulState ulOption1 Response More information on the parameters and return values is to be found in the driver package i e in the directory SOAP Do...

Страница 27: ...Function description Digital inputs outputs MSX E3701 DIO www addi data com 27 5 3 Connection examples Fig 5 2 Connection example Digital inputs 24 V Fig 5 3 Connection example Digital outputs 24 V ...

Страница 28: ...escribed For further information on the MSX E web interface please refer to the general manual of the MSX E systems see PDF link If you use the XT 370x MIX option this is shown on the homepage of the web interface in the section General Fig 6 1 Web interface XT 370x MIX option 6 1 Menu item I O Configuration 6 1 1 Digital I O tab Fig 6 2 I O configuration Digital inputs www addi data com 28 ...

Страница 29: ...n Digital outputs For each digital output the status High or Low can be defined by clicking on the corresponding button If a short circuit occurs or an external 24 V voltage is not applied this will be specified above the channel table 6 1 2 Transducers tab On this tab you can find the pin assignment of the 5 pin M18 female connectors for the connection of the transducers see also Chapter 4 1 6 2 ...

Страница 30: ...f a short circuit the required rearm can be carried out via the correspondent button Please find further information on this in Chapter 4 4 of this manual The diagnosis should be repeated in the event of transducer changes errors such as a short circuit or after a certain time 6 3 Menu item Acquisition 6 3 1 Auto refresh and Sequence tabs Fig 6 6 Acquisition modes Auto refresh and Sequence For the...

Страница 31: ... data packets to be transferred can be entered The respective transfer time is automatically displayed in the line below Via the button Display as table all the values sent for each transducer input are listed 6 3 3 Help tab Here you can find detailed information on the channel selection in Sequence mode and the data transfer in both acquisition modes ...

Страница 32: ...one or more channels can be acquired It is possible to start the acquisition by means of a trigger Directly on the MSX E system an average value can be calculated On the web interface from the menu on the left select the item Acquisition and on the right select the Auto refresh tab 7 1 1 Channel configuration channel selection Fig 7 1 Auto refresh mode Channel configuration Select the channels you...

Страница 33: ...s 1 to 8 Number of acquisitions contains the value 10 This means that ten sequences run down with each sequence consisting of eight channels to be acquired Fig 7 4 Auto refresh mode Acquisition per sequence After these ten sequences have run down the MSX E system performs the following calculation Average value of channel 1 sequence 1 value of channel 1 sequence 2 value of channel 1 sequence 10 va...

Страница 34: ...lue of channel 1 10 Average value of channel 2 value of channel 2 value of channel 2 value of channel 2 10 Average value of channel 8 value of channel 8 value of channel 8 value of channel 8 10 The network client will not receive eight data packets with ten values in each packet but only one data packet with the average values from channels 1 to 8 7 2 Sequence mode The Sequence mode enables you to...

Страница 35: ...channel can be acquired only once per sequence Select the channels you want to acquire 7 2 2 Transducer selection Fig 7 7 Sequence mode Transducer selection Select the connected transducer type 7 2 3 Delay wait time Fig 7 8 Sequence mode Delay In the Delay section you can define the wait time between the individual sequences There are two modes which are explained below With Delay you can define t...

Страница 36: ... end of a sequence and the start of the subsequent sequence is defined as the delay Example After the start of the acquisition the delay between the end and the start of the individual sequences is 2 s Fig 7 10 Delay Mode 2 example 2 s 2 s 2 s Acquisition Start enable 7 2 4 Sequence measurement number of sequences Fig 7 11 Sequence mode Sequence measurement In the field Number of sequences you hav...

Страница 37: ... be higher than the value in the field Number of sequences The latter must be divisible by this value If the MSX E system does not have sufficient memory to store the required number of sequences the measurement values are sent earlier that is before the maximum number of sequences to be acquired is reached This helps to reduce the network traffic load and the CPU resources of the MSX E systems Ex...

Страница 38: ...ant Select the division factor value between 5 and 255 7 3 2 Acquisition time Fig 7 15 Acquisition Acquisition time The total acquisition time is automatically computed according to the selected transducer and the division factor In Sequence Mode the total time also depends on the selected delay mode see Chapter 7 2 3 7 3 3 Trigger configuration The acquisition can be started by an external signal...

Страница 39: ...trigger mode Sequence see field Trigger mode the number of sequences that are acquired after a trigger is defined This value must be between 1 and 65535 Hardware trigger active edge Here the type of edge is defined in case of which the MSX E system identifies a trigger Hardware trigger count This field defines the number of edges after which an acquisition is started The following pages contain ex...

Страница 40: ...es of edges a Rising Rising edge Start enable Acquisition Software hardware trigger b Falling Falling edge Start enable Acquisition Software hardware trigger c Both Rising and falling edges Software hardware trigger Erfassung Start enable www addi data com 40 ...

Страница 41: ...ware trigger with One Shot a After the start the MSX E system waits for three rising hardware edges Once the three edges have been identified the acquisition starts Start enable Acquisition Software hardware trigger b With Hardware trigger active edge Rising is selected again and with Hardware trigger count the value 1 is entered Fig 7 18 Hardware trigger with One Shot b www addi data com 41 ...

Страница 42: ... c With Hardware trigger active edge the option Both is selected and with Hardware trigger count the value 3 is entered Fig 7 19 Hardware trigger with One Shot c After the start the MSX E system waits for three rising and falling hardware edges Once the three edges have been identified the acquisition starts Start enable Acquisition Software hardware trigger www addi data com 42 ...

Страница 43: ...One Shot d If several edges occur after the start the acquisition is started triggered with the first edge The subsequent edges are ignored Start enable Acquisition Software hardware trigger 3 Examples of hardware triggers with Sequence a To start the acquisition after each rising edge you can use the following configuration Fig 7 21 Hardware trigger with Sequence a www addi data com 43 ...

Страница 44: ...b After the start the acquisition is started after three rising and falling edges After the end of this sequence the next sequence is started after three rising and falling edges and so on Start enable Acquisition Software hardware trigger NOTICE Edges that occur during an acquisition are ignored Only those edges are considered that occur after the end of an acquisition see the previous and follow...

Страница 45: ... c The settings correspond to example 2 b with the exception of Number of sequences per trigger where the value 2 is entered Fig 7 23 Hardware trigger with Sequence c After each trigger two sequences are acquired Start enable Acquisition Software hardware trigger www addi data com 45 ...

Страница 46: ...possible to invert the sign of the measurement value Fig 7 25 Data server frame configuration Sequence mode Send an absolute time stamp with the data A time stamp is sent which contains the date of the acquisition Send a relative time stamp with the data The date of the time stamp relates to the starting point 0 of the acquisition Send the Sequence counter value with the data The value of the Sequ...

Страница 47: ...s in the Intel format Little Endian Example A packet consists of a counter value and eight measurement values The MSX E system always sends one or more of these packets The data client has to be programmed in such a way that it can receive a packet and interpret it correctly In Auto refresh mode the following data format applies Table 7 1 Auto refresh mode Data format tv_sec tv_usec Auto refresh c...

Страница 48: ... bytes x amount of data optional if data format has time stamp optional if data format has time stamp optional if data format has Sequence counter The amount of data depends on the Sequence channel list To both modes applies Data format without conversion into an analog value Data x 32 bit digital value Data format with conversion into an analog value Data x 32 bit floating point value analog valu...

Страница 49: ...fied EMC laboratory in accordance with the norm from the EN 61326 series IEC 61326 The limit values as set out by the European EMC directive for an industrial environment are complied with The respective EMC test report is available on request 8 2 Mechanical structure Fig 8 1 MSX E3701 DIO Dimensions Dimensions L x W x H 260 x 110 x 50 mm Weight 965 g 1025 g with MX Rail Fig 8 2 MSX E3701 DIO View...

Страница 50: ... can be found on the type label of your Ethernet system see also Chapter 1 1 of the general MSX E manual Table 8 2 MSX E3701 DIO Option Option Features XT 370x MIX for 16 HB or LVDT displacement transducers of different types 8 4 Limit values Height 2000 m over NN Operating temperature 0 C to 60 C Storage temperature 25 C to 70 C Relative air humidity at indoor installation 50 at 40 C 80 at 31 C I...

Страница 51: ...rs at 5 V power 50 kHz and 1 Vrms digital I O switched off switched on 20 mA 330 mA 10 NOTICE After boot up the MSX E system should warm up for a minimum 15 minutes so that a constant internal temperature will be reached 8 4 1 Ethernet Number of ports 2 Optical isolation 1000 V Cable length 150 m max for CAT5E UTP Bandwidth 10 Mbps auto negotiation 100 Mbps auto negotiation Protocol 10 Base T acco...

Страница 52: ...ncy 1 MHz at nominal voltage Signal threshold 2 2 V typ 8 4 3 Synchro input and output Number of inputs 1 Number of outputs 1 Optical isolation 1000 V Output type RS422 Driver level master VA B 1 5 V low 1 5 V high Receiver level slave VA B 200 mV low 200 mV high 8 4 4 Transducer inputs Number of inputs 16 multiplexed Input type single ended Coupling DC Resolution 24 bit Transducer accuracy Please...

Страница 53: ...ble 8 4 5 Sine wave generator transducer supply Number of outputs 2 Coupling AC Programmed signals Type sine differential Output frequency 5 kHz typ 7 69 kHz typ 10 kHz typ 12 5 kHz typ 20 kHz typ 50 kHz typ Output level Output range 11 V max Output impedance 0 1 Ω typ 30 kΩ typ in shutdown mode Short circuit current 0 7 A typ at 25 C with thermal protection Switching time Buffer Off On 1 μs typ B...

Страница 54: ...19 V 2 mA typ ULmax 14 V 0 7 mA typ ULmin 0 V 0 mA typ 8 4 7 Digital outputs Number of outputs 16 Output type high side load to ground according to IEC 1131 2 driver type Infineon BTS4880R 8 channel type Optical isolation 1000 V via opto couplers Nominal voltage 24 VDC Supply voltage 11 36 V Current 1 5 A per 8 channels via PTC Output current per output 150 mA max Short circuit current per output ...

Страница 55: ...inus infinity the L level corresponds to digital 0 The rising edge is the transition from the status 0 to 1 the falling edge is the opposite transition EMC Electromagnetic Compatibility The definition of the VDE regulation 0870 states Electromagnetic compatibility is the ability of an electrical installation to function satisfactorily within its electromagnetic environment without unduly affecting...

Страница 56: ...5 protection against jets of water from any direction In IP 40 the figure 4 equates to protection against contact with small objects and protection against small foreign bodies larger than 1 mm The figure 0 means that there is no protection Level Logic levels are defined for processing and displaying information In binary switches voltages are used for digital values Here the two voltage ranges H ...

Страница 57: ...storage in distributed systems Switch off time The switch off time is the time between the control current being switched off and the output voltage falling to 10 of its original value synchronous Two time dependent events time slots or signals are synchronous if their respective significant dates correspond with each other and are divided by requested time intervals that are nominally the same TC...

Страница 58: ... 11 Glossary 55 Handling 10 Intended use 8 Limit values 50 Pin assignment Digital I O 26 Transducer inputs 15 Safety precautions 8 Sequences 36 Sine wave generator 16 Technical data 49 Time stamp 46 Transducers Calibration 16 Diagnosis 25 Half bridge 13 LVDT 14 Trigger Configuration 38 Hardware Trigger 40 Update Driver 10 Firmware 10 Manual 10 Usage restrictions 8 User Qualification 9 Versions 50 ...

Страница 59: ...estions Write or phone us Address ADDI DATA GmbH Airpark Business Center Airport Boulevard B210 77836 Rheinmünster Germany Phone 49 7229 1847 0 Fax 49 7229 1847 222 E mail info addi data com Manual and software download from the Internet www addi data com www addi data com 59 ...

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