User Manual LVC - 2500 Low Voltage Conditioner
Contents
1. 8 terminals If a 1 kQ load is required an additional 1 kQ resistor may be used 2 No input options are offered As connection of transducer is by screw terminal additional internal configuration methods are not required By changing connections and use of external components the user can perform e Change input polarity e Half Bridge connection Grounding one side of the input 3 The LVC can drive a 1 kQ load but this offers no advantage 10 100 kQ is recommended 4 Output range can be adjusted as required anywhere within this range by using a combination of gain and offset for example 10 VDC 45 VDC 0 5 VDC 0 10 VDC 4 20 MA 5 Maths requires the use of a second LVC An additional output offset may be seen at any of the MATH outputs This is not specified as it is trimmed out during set up 6 The LVC is able to comply with the toughest electrical emissions and immunity regulations Compliance requires proper installation according to the user manual Compliance does not guarantee performance as the installation environment may be outside of test specification limits The flexibility of the LVC means it can be installed in a variety of ways according to user requirements Simple installations with short cables will meet the lesser light industrial immunity regulations Heavy industrial installations especially with longer cables will need more careful installation with shielded cable 7 0 Specification cont Manual Part No 0653 02. Mout 1 Mout 1 Vout Mout 1 Mout 4 0 MATH Functions Manual Part No 0653 0003 0000 Rev B 4 0 MATH Functions cont 4 2 MATH Set up Procedure ee oi E o 1 1 mee o d on oa la Gm O 2 sn O 2 E 2 eel 2 eee O 2 dim 06 3 o 0 3 3 o 0 3 n 3 4 oo m LINK FOR o 014 4 o 0 4 4 O 0 4 X 2 A B AB A4B 2 A B 2 Mout Vout Setting up two LVC for MATH can become confusing as the output of each LVC will affect the final output The steps below are guidelines to help the set up process Step 1 Requirements Write down the arithmetic required and the range of outputs likely to be seen This will allow the requirement for each individual LVC to be determined Vout of each LVC is used Example 10 V required for A B If each LVC is set to 10 V then A B would calculate to be 220 V However as this is not possible each LYC must be set to 45 V or use 10 V A B 2 Example 0 10 V required for A B Set each LVC for 0 5 V or set each LVC to 0 10 V and use A4B 2 Step 2 Initial set up Set up each LVC as an individual module first Working around transducer null and having a V output will make set up easier Step 3 Final checks and further comments Initially each LVC Vout may have been set to an accurate zero but an offset may still be seen at Mout This is because of offsets inherent within the MATH circuits To remove this offset adj ust one of the Vout offsets Mout offset adj ust
3. performance the EMC compliance of surrounding equipment must be considered High levels of EMI electro magnetic interference can affect the performance of LVC Residential Commercial and Light Industrial Environments Typically this will be an office laboratory or industrial environment where there is no equipment likely to produce high levels of electrical interference such as welders or machine tools Connections may be made using twisted pair wire which is a cost effective option giving good performance in this environment Standard equipment wire 24AWG can be twisted together as required Standard data cable such as a generic CAT5 UTP will also give good performance Industrial Environments Typically this will be an industrial environment where there is equipment likely to produce high levels of electrical interference such as welders large machine tools cutting or stamping machines The LVC should be mounted inside an industrial steel enclosure designed for EMI shielding Many enclosures though metal are not designed for shielding and so careful installation is important Place the LVC away from equipment within the enclosure that is likely to produce high levels of EMI Connections should be made using a shielded cable braided or foil schielded cables may be used The cable shield should be connected to the housing at the cable entry point An EMC cable gland is recommended If this is not possible then the unshielded section of cabl
4. 003 0000 Rev B Return of Product Devices returned for service repair calibration should be shipped prepaid Macro Sensors USRT130N Bldg 22 Pennsauken Nj 08110 1541 USA The shipping container should be marked Attention Repairs The following information should accompany the device s 1 Contact details of company person returning device including return shipping instructions 2 Get an RMA number from Macro Sensors Customer Service Representative Call 856 662 8000 or email sales macrosensor com 3 Description of the device fault and the circum stances of the failure including application environ ment and length of time in service 4 Original purchase order number and date of purchase if known Please note Astandard assessment charge is applicable on all non warranty devices returned for repair Customer damage and any device found upon inspection to have no fault will be considered non warranty Please contact Macro Sensors for warranty terms service options and standard charges Adherence to these procedures will expedite handling of the returned device and will prevent unnecessary additional charges for inspection and testing to determine the condition Macro Sensors reserves the right to repair or replace goods returned under warranty Macro Sensors reserves the right to make changes without further notice to any products herein to improve reliability function or design Macro Sensors
5. 3 O 0 4 O 0 4 O 0 4 3 kHz 5 kHz 10 kHz 2 6 Bandwidth The LVC has selectable bandwidth BW The bandwidth setting is independent of other LVC settings Where possible the lowest bandwidth setting should be used to minimize output noise 250 Hz Link ON 500 Hz Link PARKED Note Total system bandwidth is dependent on sensor type and application Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 7 Basic Configuration Please refer to section 2 10 before installation A floating output power supply is recommended as it will minimize ground loop noise problems Please refer to section 6 1 for a typical arrangement Transducer Local fixture ground as required Power supply 10 30VDC sal converter Voltage and current connections are shown Generally only one type is used 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 8 Output Descriptions Coarse Gain Fine Gain pee a This section describes how the various D A outputs of the LVC are related Sg Transducer Circuits Vout This isa voltage output The gain and offset controls are used to set the required output range All other outputs are affected by changes made to Vout This is a current output only LYC is not loop powered This can be set for up to 220 MA A common output is 4 20 mA The lout is proportional to Vout but cannot be independently adj usted The approxim
6. Arn Oc Q Terminals 5 11 and 15 are internally connected but for best performance they should be treated as nual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 3 Description of links The table below and subsequent diagrams explain the link functions and detail the factory settings L 250 Hz H 500Hz Note If the output polarity is incorrect reverse the transducer secondary connections E i n Link ON Link PARKED Link OFF 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 4 Primary Frequency The LVC primary frequency is set using links as shown below Transducer specifications determine the optimum frequency Primary amplitude is not adjustable The LVC uses ratiometric techniques and is insensitive to primary amplitude Maximum secondary transducer amplitudes must be observed Refer to section 5 1 2 5 Transducer Input Load The LVC has two input load ranges 100 kQ is often used for LVDT transducers while 2 kQ is often used for Half Bridge transducers If loads of less than 100 kQ are required an external resistor may be wired across the SEC1 and SEC2 terminals Most transducers perform well into 100 kQ See specification section 7 2 for further details 100 kQ link PARKED 2 kQ link ON 2 0 Installation cont Ee J es 1 fone 2 G ol 2 O O 3 O 0 3 O O1
7. LVC 2500 Low Voltage Conditioner C User Manual MAC2O SENSO2S Division Of Howard A Schaevitz Technologies Inc Index 1 0 Safety Information 2 4 0 MATH Functions 18 1 1 Electrostatic discharge 3 4 1 MATH Introduction 18 4 2 MATH Set up Procedure 19 2 0 Installation 4 2 1 Mounting and Access 4 5 0 Transducer Sensitivity 20 2 2 Connections and Link Identification 5 5 1 X2 X5 and DIV2 Link 20 2 3 Description of Links 6 2 4 Primary Frequency 7 6 0 Application 21 2 5 Transducer Input Load 7 6 1 Application Example 21 2 6 Bandwidth 7 2 7 Basic Configuration 8 7 0 Specification 22 2 8 Output Descriptions 9 7 1 Mechanical Outline 22 2 9 Connections 10 7 2 Technical Specification 23 2 10 Placement and EMC 11 2 11 LVC Synchronization 14 3 0 Setting Up 15 3 1 Set up Summary 15 3 2 Set up Procedure 16 Index e Manual Part No 0653 0003 0000 Rev B 1 0 Safety Information Terms in this Manual WARNING statements identify conditions or practices that could result in personal injury or loss of life CAUTION statements identify conditions or practices that could result in damage to the equipment or other property Symbols in this manual This symbol indicates where applicable cautionary or other information is to be found Warnings amp Cautions WARNING Do not operate in an explosive atmosphere WARNING Safety critical environments This equipment is not intended for use in a safety critical environment CAU
8. TION Low voltage This equipment operates at below the SELV and is therefore outside the scope of the Low Voltage Directive This equipment is designed to work from a low voltage DC supply Do not operate this equipment outside of specification 1 0 Safety Information Manual Part No 0653 0003 0000 Rev B 1 0 Safety Information cont Warnings amp Cautions 1 1 CAUTION Electrostatic Discharge This equipment is susceptible to electrostatic discharge ESD when being installed or adj usted or whenever the case cover is removed To prevent ESD related damage handle the conditioning electronics by its case and do not touch the connector pins During installation please observe the following guidelines A N Ensure all power supplies are turned off e If possible wear an ESD strap connected to ground If this is not possible discharge yourself by touching a metal part of the equipment into which the conditioning electronics is being installed Connect the transducer and power supplies with the power switched off Ensure any tools used are discharged by contacting them against a metal part of the equipment into which the conditioning electronics is being installed During setting up of the conditioning electronics make link configuration changes with the power supply turned off Avoid touching any other components Make the final gain and offset potentiometer adjustments with power applied using an appropriate pot
9. able interaction between gain and offset adj ustment This does not prevent the LVC being set up although several iterations may be required when adj usting gain and offset 3 0 Setting Up cont Manual Part No 0653 0003 0000 Rev B 3 0 Setting Up cont Step 3 Setting bi polar full scale output 1 Move the transducer core to the position where maximum LVC output is required 2 If the output polarity is wrong reverse the transducer primary connections terminals 3 amp 4 Move the transducer core back and re check the zero position 3 Move the coarse gain link along from position 1 towards position 6 until the LVC output is near the required value 4 Adjust the fine gain control to give the required output 5 The bi polar output is now set Proceed to step 5 If a uni polar output is required proceed to step 4 Example 10 V is required froma mm transducer Set the transducer core at the L mm position and set the output to 10 V Step 4 Setting uni polar full scale output adding an offset 1 Move the transducer core to the null position D C output will be 0 V or O mA 2 Apply offset using the VE VE 5 V and 10 V links and adj ust the fine offset control to set precisely Both links may be used to give greater offset shift Proceed to step 5 Example 0 10 V is required for a 1 mm transducer Set the transducer core to give 5 V over the full range and then with the transducer core at null add 5 V offset Adj us
10. ate relationship is shown below ECTS OE Joe current mi _ 20 35 32 e a 0 a 8 36 20 van Vout lout Mout When relating current to voltage 4 20 MA is the same as a 2 to 10 V span or 4 V with a 6 V offset Mout is the main MATH output This is a voltage output Vout and Min are combined in the MATH section The output of this section is inverted to keep the signal polarity the same as Vout Mout AN7 MA Mout This is an auxiliary voltage output This is the direct output of the MATH stage and is the inverse of Vout If MATH options are not selected then Mout x Mout oc Vout Refer to section 4 1 All outputs may be used at the same time but cannot be independently adj usted for scale factor or offset 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 9 Connections The diagram in section 2 7 shows a basic connection with LVDT The following diagram gives further details of Macro Sensors LVDT transducers and alternative connections for Half Bridge transducers Half Bridge LVDT ov ov GND GND The CT terminal is provided to terminate the center tap CT connection of a transducer if present There is no electrical con nection within the LVC 2 0 Installation cont O Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 10 Placement and EMC The LVC has been designed to comply with EMC regulations For best
11. does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under patent rights nor the rights of others MAC O SENSO 2S Division Of Howard A Schaevitz Technologies Inc Innovators in Position Sensing 7300 US Route 130 North Bldg 22 Pennsauken NJ 08110 1541 USA 856 662 8000 fax 856 317 1005 www macrosensors com lvdts macrosensors com Macro Sensors pursues a policy of continuous development Specifications in this document co ANSI RAB FE may therefore be changed 5 n gt without notice v adr o
12. e should be kept as short as possible and the shield should be connected to a local ground Where possible the LVC should be the only ground connection point If voltage current or power supplies are ground referenced and connected at some distance from LVC then noise may be introduced All Gnd terminals on LVC are connected internally Only one local ground is needed for each LVC Alocal power supply is ideal but if this is not possible a shielded cable arrangement can be used to reduce noise picked up 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont Keep exposed cable as short as possible LVC 2500 LOW VOLTAGE CONDITIONER CE Keep exposed cable as short as possible Connect shield to chassis ground EMC gland J Enclosure 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont Transducer converter 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 11 LVC Synchronization When a system comprises several LVC modules it is possible to synchronize primary oscillator signals Synchronization will not be required for most installations It is only required when transducers and their cables are installed in close proximity to each other and there may be electrical interaction or cross talk between sensors This may be seen as a change in output from one module when the sen
13. entiometer adjustment tool or a small insulated screwdriver 1 0 Safety Information cont E Manual Part No 0653 0003 0000 Rev B 2 0 Installation 2 1 Mounting and Access Before mounting the LVC please refer to section 2 10 Hook the LVC on the DIN rail with the release clip facing down and push onto the rail until a click is heard To remove use a screwdriver to lever the release clip down Pull the bottom of the housing away from the rail and unhook DIN Rail Cover Release Latch Withdraw PCB To access internal links the front cover and PCB must be withdrawn from the housing Use a screwdriver or similar tool to depress the top latch The cover will spring forward Repeat with the bottom latch then gently pull the PCB out 2 0 Installation O Manual Part No 0653 0003 0000 Rev B 2 0 Installation cont 2 2 Connections and link identification Transducer Synchronization 1 Synchronization 2 Primary Primary SWNH Shield 0 V CT Secondary Secondary ONU Power Supply amp Outputs 9 Voltage Output 10 Math OUT 11 GndOV 12 Current OUT 13 Math External IN 14 Inverted Math OUT 15 VE power supply Gnd 16 VE power supply separate terminals 2 0 Installation cont e Coarse Offset e Primary Frequency e Synchronization e Input Load e Input Gain e Coarse Gain e Bandwidth e Null at set up e Math Ma e O 5 a I pi jac n
14. i e 10 VDC or 20 NA follow steps 1 to 3 For a uni polar output i e 0 10 VDC 0 20 mA or 4 20 MA follow steps 1 to 4 In either case step 5 final checks should be followed to complete the set up 3 0 Setting Up Manual Part No 0653 0003 0000 Rev B 3 0 Setting Up cont 3 2 Set up Procedure Step 1 Set up LVC links If the transducer characteristics are known set the frequency and input resistance links as required If the transducer characteristics are not known the factory default link settings should be used If the transducer is known to be outside the standard sensitivity range the X2 X5 or DIV2 links will have to be used Please refer to section 5 1 Step 2 Mechanically align LVC and transducer null Any electrical offset in the LVC is removed The transducer core position is adj usted so that transducer and LVC nulls are aligned Null the LVC 1 Put the gain link onto the null position This puts a temporary short across the transducer input and allows any electronics offset to be removed 2 Adjust the fine offset control to give as near zero output as practical gt Null the transducer 3 Replace the gain link from null to the original position 4 Adjust the position of the transducer core to give as near zero output as practical This is the center of the mechanical range If the transducer cannot be centered for practical reasons an offset will remain within the system There may be notice
15. ment is best performed on the LVC set for MATH 4 0 MATH Functions cont Manual Part No 0653 0003 0000 Rev B 5 0 Transducer Sensitivity 5 1 X2 X5 and DIV2 link The LVC compensates for changes in primary signal amplitude by producing an internal error signal that is the ratio between the primary and secondary signals If the transducer output signal is too high or too low errors may occur that can degrade the performance of the LVC transducer combination For these transducers the X2 X5 or DIV2 input gain link must be used Calculating transducer Full Scale Output In general transducer sensitivity is quoted as V V inch where V output of the transducer V primary voltage inch mechanical position of the transducer from null usually mid mechanical range To calculate the transducer full scale output simply multiply all three together Set the X2 X5 DIV2 link as shown in the table below 400 mV FSO to 2500 mV FSO Standard range Link ON X1 Transducer Full Scale Output Input Gain Link setting 150 mV FSO to 400 mV FSO Low output transducer Link ON X2 55 mV FSO to 150 mV FSO Very low output transducer Link ON X5 2500 mV FSO to 5000 mV FSO High output transducer Link ON DIV2 5 0 Transducer Sensitivity Manual Part No 0653 0003 0000 Rev B 6 0 Application 6 1 Application example Probe B Probe A Actual installation may differ depending on requirements This is one practical example DVM pr
16. obe A probe B To 24 VDC Supply ro RAND Conditioner Conditioner Conditioner A Linked to Conditioner B A B 6 0 Application Manual Part No 0653 0003 0000 Rev B 7 0 Specification 7 1 Mechanical Outline mm 111 0 22 5 a LVC 2500 g Sa CONDITIONER CE 1005 B 114 5 7 0 Specification 3 Manual Part No 0653 0003 0000 Rev B 7 0 Specification cont 7 2 Technical Specification Power Requirement Voltage Range 10 to 30 VDC Transducer Excitation Signal Input Transducer Sensitivity Range Signal Output Coarse link selectable 10 VDC 20 MA Up to 100 5 VDC 210 MA Output Offset 3 coarse amp fine adjustment Fine front panel adj ust 42 5 VDC 5 6 MA 7 0 Specification cont o Manual Part No 0653 0003 0000 Rev B 7 0 Specification cont Signal Output cont warm mandi 3 0 wats Environmental Mechanical and Connections Power Supply 3 Enclosure size 114 5 x 99 x 22 5 mm Weight 120 g Material Green polyamide 7 0 Specification cont _ Manual Part No 0653 0003 0000 Rev B 7 0 Specification cont Notes 1 Where load resistance is critical an external resistor may be installed If a 10 kQ load is required an additional 11 kQ resistor may be used in conj unction with the 100 kQ internal load This may be connected across the SEC1 7 and SEC2
17. sor connected to an adj acent module is moved Even when sensors are installed close to each other synchronization may not be required as cable shielding is generally effective If interactions are seen the cause is often poor ground or shield connection or mechanical effects between sensors when mounted together PCB Idents 3 5 10 1 Moo Transducer Outpu 12 7 Transducer Output i Transducer 2 EE 00 00 3 00 EE 4 E o0 M T Link Positions Primary links not shown O 0O 1 JO O 1 o 012 jo of 00 3 E53 G 4 o O 4 MASTER TRACK 2 0 Installation cont Manual Part No 0653 0003 0000 Rev B LVC A set as MASTER LVC B set as TRACK LVC C set as TRACK 3 0 Setting Up 3 1 Set up Summary This is a set up summary A more detailed procedure is included in following sections but these simple steps describe a typical setting procedure and apply to most applications Other procedures may be used as appropriate e Mechanically align transducer null gain Primary frequency Zero 5V Zero Transducer load Initial gain electronics electronics Bandwidth i No offset i i f iranshucer i No MATH transducer transducer l l i I Null Null Null f in doubt about initial link position use the factory setting Performing initial set up without offset and MATH options makes set up easier For a bi polar output
18. t the fine offset to give 5 V When the transducer core is moved to the 1 mm position the output will be 10 V Example 4 20 MA is required for a 1 mm transducer Set the transducer to give 48 MA over range and then with the transducer at null add 5 V 10 mA offset Adjust the fine offset to give 12 mA When the transducer core is moved to the 1 mm position the output will be 20 mA Step 5 Final checks Ensure that calibration is correct by moving the transducer core through the required mechanical range including the mid position and checking the calibration points Fine adj ustments can be made if required It may only be possible to set the output accurately at the two calibration points This is due to non linearity within the transducer 3 0 Setting Up cont Manual Part No 0653 0003 0000 Rev B 4 0 MATH Functions 4 1 MATH Introduction By linking two LYC modules the following analog arithmetic may be performed A B A B A B 2 and A B 2 The output of LYCA Vout is connected to the Min terminal of LYC B The output of LYC B is routed internally to the arithmetic circuits and the result is available at the Mout terminal The inverse of Mout is available as Mout Vout Mout and Mout may be used at the same time however they are not individually adj ustable Transducer A Output IVCA No MATH link setting required Vout transducer A Power Supply Supply Math position Mout Vout
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