Datasheet - Sensor Technology
Contents
1. 1 shaft weight approx Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2015 RWT3722R Rev5 RWT410 420 Series Torque Transducers Standard Range e Standard feature Optional feature ae Le Series Code Torque Speed Power Outputs a RWT410 D Toueony a Torque amp Speed 60 pulses rev A rr User to specify RPM FSD when ordering Torque amp Power 60 pulses rev O Us t oey Paree User to specify Power FSD when ordering Torque amp Speed 60 pulses rev aa fe Outputs are user selectable or Power Standard features EA IS MA Keyed Shaft Ends e e K INm will have flats Voltage output 5v FSD Fixed Voltage outputs from 1v to 10v FSD RS Dour E and unipolar Variable RS232 output Torque Averaging and Torque Peak e e Self Diagnostics e e A TA series onl Ela OO IC O lubrication Ingress Protection IP O o o eee Optional features IS DIO DI AA AAA Plain Shaft Ends Shaft length will be longer than keyed end shafts consult factory for length Splined Shaft Ends o T Consult factory for details Voltage output 1v FSD Fixed as CE TS In place of Option B Voltage output 10v FSD Fixed In place of Option B Fixed to specify range scale when ordering RSR options we E e A options AA ACT options Current output is user Current outpu2. 0 2 x user selectable voltage or current analog outputs one for torque and the other for speed power or peak torque for interfacing with analog instrumentation Transducer configuration software to allow user to changes transducer variables BIT Self diagnostics for letting users know data is trustworthy that the transducer s torque speed ratings and calibration due date have not been exceeded e Simple Sensor status output pin e Sensors to monitor shaft temperature for better compensation and accuracy Ability to connect up to 10 transducers using USB Benefits e Minimal shaft length High shaft stiffness e Low inertia High Speed capability because electronics are not fixed onto shaft e Non contact brushless measurement e High Bandwidth e 300 safe mechanical overload e High accuracy 0 25 and resolution 0 02 e Excellent noise immunity e Integral digital electronics TOR A Software e Operates both statically and dynamicall j y Y TorqView is an easy to use advanced torque monitoring clockwise anti clockwise ft lab st d d d e Any full scale torque can be specified within Bol are ay allan LOS SR Sata eno standard range 1Nm through to 13 000Nm instrumentation displays that interface with Windows e Lifetime warranty based PCs Features include 3 types of display text files compatible Consult factory for ranges greater than 13KNm with Matlab and Excel and Real time chart plotting High spee
3. RWT410 420 series Torque Transducer oe Sensor E TECHNOLOGY x SENSE Digital RWT410 420 series Torque Transducer TorqSense Digital RWT410 420 series transducers TorqSense RWT410 series transducers offer with integral electronics now offer cost effective non e Fixed voltage or current analog outputs one contact digital rotary torque measurement using for torque and the other for speed or power for Surface Acoustic Wave technology suitable for torque interfacing with analog instrumentation monitoring testing or controlling drive mechanisms BIT Self diagnostics for letting the manufacturer TorqSense RWT410 420 series transducers and know that the transducer s torque speed ratings their technology are particularly appropriate for OEM and calibration due date have not been exceeded applications e Simple Sensor status output pin e Sensors to monitor shaft temperature for better compensation and accuracy Whereas TorqSense RWT420 series transducers offer The new TorqSense RWT410 420 torque sensors replace the RWT310 320 series and feature all new electronics that have produced significant performance gains in resolution frequency response reduced sensor Digital outputs such as RS232 CANbus and USB for interfacing with modern instrumentation and laptops Digital input for configuring transducer via PC current consumption and faster digital data throughput Transducer overload has also been increased to 30
4. apture 10000 torque readings Testing was conducted with each connection method configured at its maximum baud rate The maximum output rate available for CAN and USB is dependant on the transducers setup USB USB Is a host based bus architecture because of this the outout rate achievable will be affected by other bus traffic and host activity USB has two transfer modes Single Transfer which requests 1 reading at a time and Bulk Transfer which transfers readings in blocks of 50 Torque Speed pairs CAN Bus to achieve a Torque reading output rate of 10KHz the Speed reading output rate must be reduced to 100Hz Sensor Technology Ltd 2015 RWT3722R Rev5 Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice RWT410 420 Series Torque Transducers Dimensions 1Nm to 100Nm 145 00 Option P plain shaft 180 00 120 00 Option P plain shaft 144 00 M4 x 6 5 DEEP C40 00 16 00 Ha Measurement units Millimetres mm Parameter Data Units Mechanical Properties Torque Max rshatcode e f oa or Dar pc pg pp oe e ee o e A be Lens ee eee eee ee Stiffness Mass moment of inertia Ly Max measurable 120 of rated torque load limit Static safe load 300 of rated torque breaking Shaft weight 0 03 0 14 0 14 0 14 0 14 0 15 0 15 0 36 0 37 0 41 approx 7 Transduc
5. ds available on request See TorqView datasheet for more details Technology TorqSense patented technology is the measurement of the resonant frequency change in frequency dependent Surface Acoustic Wave SAW devices caused when Strain is applied The signal is coupled via a non contact RF rotating couple from the shaft to a fixed pick up Integral electronics enables the resonant frequencies to be measured and offer user selectable features digital outputs and diagnostics SAW devices are not affected by magnetic fields LabView VIs are available for users to design their own process control applications DLLs are also available for users to write their own custom software US Patents US5585571 US6478584 RWT3243R Rev 5 RWT410 420 Series Torque Transducers Data Specification Parameter Condition Data Units RWT410 420 Torque measurement system Measurement method Strain Dependent Surface Acoustic Wave Resonators interrogated by an incremental electronic scanning method Torque range See Notes 1 amp 0 1 O 1 1 0 21 0 101 0 501 0 2001 Nm 2 below to 0 20 to 0 100 to 0 500 to 0 2000 to 0 13000 0 10 0 11 0 201 0 1001 0 5001 0 20001 lbf in to 0 200 to 0 1000 to0 5000 to0 20000 to 0 175000 Shaft size diameter 6 a 202 30 Rotation speed angle of rotation measurement system Measurement method Opto switch through slotted disc Pulse output direc
6. ectable 4 20mA Loop resistance Sold not exceed 400 U O Q Digital output RWT420 Series Transducers ONLY Single Transfer Up to 500 Hz Output Rate Note 7 Up to 10 KHz Upto ek NZ Bulk Transfer Up to 10 KHz Power supply Nominal voltage Vs in 12 to 32 max Current consumption ls 230 max 12 VDC RE SA Power consumption Ws 3 Allowed residual ripple of 500 mVp p supply voltage Vriople above nominal supply voltage Electromagnetic compatibili EMC compatibility N EN 61326 2006 A Note 1 Any torque FSD Is possible between ranges please specify max rated torque Note 2 Max rated torque should not be exceeded Note 3 Please consult factory for applications requiring rotational speeds that exceed maximum figures given Transducers fitted for IP65 will have running speeds considerably reduced increased drag torque and accuracy can be affected Note 4 SM Static Mode Dynamic values will depend upon user application and has to be adjusted accordingly Note 5 Digital averaging can be configured by user to optimise accuracy frequency response for specific user applications Digital averaging default setting is N 16 For details see User Manual Note 6 gt 5Khz Sample Rate Up to 10Khz sample rate possible please consult factory Digital averaging also affects the analog output max analog output 3dB Bandwidth 5Khz when digital average is 1 Note 7 Output rate figures are calculated from the time taken to c
7. em via 15 pin D connector type connector male Digital Lead Adapter Length 1m For connecting RWT to PC via 15 Way D type female to RS232 and ACC 5 RS232 Power Connectors Also needs Digital Lead ACC4 to connect to RWT Digital Lead Adapter Length 1m For connecting RWT to PC via 15 Way D type female to RS232 USB ACC 6 USB Option G or RS232 and Power Connectors Also needs Digital Lead ACC4 to connect to RWT Digital Lead Adapter Length 1m For connecting RWT to PC v a 15 Way D type female to CANbus and CANbus Option H Power Connectors Also needs Digital Lead ACC4 to connect to RWT Digital Lead Adapter Length 1m For connecting RWT to PC v a 15 Way D type female to CANbus USB USB Option G or CANbus and Power Connectors Option H Also needs Digital Lead ACC4 to connect to RWT RWT410 420 Series Torque Transducers Additional related products Code Remarks Purpose Transducer Display ETD Display readout AC Mains Adapter Power Supply PSU 1 For providing 12 32Vdc EAS Transducer Signal Breakout Unit SBU 1 Torque Monitoring Software ACC 364 Do E Oe 7 i ee a ee 50 p 12 Pin Lumberg ACC 5 or 8 RS232 ACC 5 CANbus ACC 8 15 Way D Type connects to ACC4 Power ACC 6 or 9 15 Way D Type connects to ACC4 Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimen
8. er with 0 1 0 1 0 1 1 1 1 shaft weight approx Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2015 RWT3722R Rev5 RWT410 420 Series Torque Transducers Dimensions 101Nm to 500Nm 190 00 Option P plain shaft 230 00 M5 x 10 DEEP Measurement units Millimetres mm Mechanical Properties Torque Max 175 225 265 350 500 Shaft Code a Shaft Size Diameter Torsional stiffness kNm rad inertia load limit Static safe load 300 of rated torque breaking Shaft weight approx Transducer with 2 4 2 4 2 4 2 5 2 5 kg shaft weight approx Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2015 RWT3722R Rev5 RWT410 420 Series Torque Transducers Dimensions 501Nm to 13000Nm 125 00 M6 x 14 DEEP 0 15 62 00 7 50 lt n Measurement units Millimetres mm Unis Mechanical Properties Ce ec 6D HA HB HC HF HG Shaft Size 50 75 mm Diameter Torsional TBC TBC 199 2 TBC 214 1 TBC TBC 914 4 945 5 TBC kNm rad Stiffness 1497 TBC TBC 7932 7 9407 1 TBC 10 kgm 120 of rated torque 300 of rated torque load limit breaking Shaft weight Mass moment of TBC TBC 1330 inertia B approx Transducer with TBC TBC 7
9. me or similar results Accuracy of the overall TorqSense system is limited by the combined error of several factors such as linearity hysteresis temperature drifts and other parameters affecting measurements If errors in the system are known or can be estimated an overall error or uncertainty of measurement can be calculated e Digital averaging The application of algorithms to reduce white noise In any electronic system electronic white noise is mixed with the signal and this noise usually limits the accuracy To reduce the influence of white noise and increase the accuracy of the system different averaging algorithms can be applied In the TorqSense system a flying digital averaging technique Is applied to reduce the white noise commensurate with the level of accuracy required However as any averaging algorithm works as a low pass filter the more averaging that is applied the lower the frequency response Therefore each Torqsense system should be optimised to the customer s requirements by choosing the right combination of accuracy frequency response Please see relevant part of the Datasheet and User Manual Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2015 RWT3722R Rev5
10. mum measurable number corresponding to the stress strain sensitive resonance point of the SAW resonator The value is limited by following the factors e frequency resolution of the synthesiser which is 1000 times greater then overall resolution of the system e relationship between frequency response and resolution Increments of the resolution will proportionally decrease the system s frequency response TorgSense systems are optimised for the best performance that suits most applications However on the RWT420 series models customers do have the capability to adjust the system performance e Frequency response of the ES method The measure of the TorqSense system s response at the output to a signal of varying frequency at its input The frequency response is typically characterised by the magnitude of the system s response measured in dB There are two ways of characterising the system s frequency response e 0 1dB frequency range where the output magnitude of the signal is different to the input magnitude of the signal by not more then 0 1dB practically absolutely identical e 3dB frequency range where the output magnitude of the signal is 0 707 of the input signal This is a common standard for most applications unless it specifically says otherwise This standard is also used to characterise the TorqSense system s frequency response e Accuracy The degree of conformity of a measured or calculated quantity which will show the sa
11. sions without notice Sensor Technology Ltd 2015 RWT3722R Rev5 When ordering a Torque Transducer please note that any torque FSD is possible between ranges please specify rated torque and options using the following format A basic transducer with 411 15Nm K CL torque and speed outputs rated and calibrated to 15Nm FSD with keyed ends 10v and IP65 protection RPM MI if applicable See over For example RWT Your transducer requirement RWT Max speed if applicable Connector amp Lead options Additional related products if applicable See over Glossary of terms and definitions used in this datasheet e Surface Acoustic Wave SAW An acoustic wave travelling along the surface of a material having some elasticity with amplitude that typically decays exponentially with the depth of the substrate e Strain dependent SAW resonators A type of elastic SAW device which changes its resonant properties when it is subjected to axial strain compression TorgqSense uses this principle which is protected by a number of patents e Incremental Electronic Scan IES The most successful and precise method for interrogating strain dependent SAW resonators The IES interrogation method uses a processor controlled frequency synthesiser to excite the SAW resonators over a defined range of frequencies and measure the reflected signal TorqSense uses this patented method e Resolution of the IES method The mini
12. t 0 20mA 4 20mA selectable and in place of amp 12 8mA Variable 5 Voltage output However user can reselect a Voltage output if required Note 8 AS USB 2 0 full tul speed 12 Mbps Digital output 12 Mbps Digital output G CANbus output output TA DT I In place of RS232 ouput pee Note I below Consult factory for maximum Sealed Bearings o o S5 See Note 10 below Note 8 2 x analog channels available Default settings are Channel 1 voltage current torque Channel 2 voltage current soeed or power if ordered Note 9 At very high speeds for better balance the factory recommend plain or splined shafts Note 10 Transducers fitted for IP65 will have running speeds considerably reduced increased drag torque and accuracy can be affected Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2015 RWT3722R Rev5 RWT410 420 Series Torque Transducers Connector and Lead Options RWT410 420 Remarks Purpose WIDE CATA Connectors amp Connectors amp Leads FER Po e ECS 12 Pin Lumberg female ts EE e 12 Pin Lumberg male Analog Lead Length 2 5m For connecting RWT to users Pin Lumberg female to 15 way D ACC 3 system via 15 pin D connector type connector female Digital Lead Length 2 5m For connecting RWT to users 12 Pin Lumberg male to 15 way D fe acca syst
13. t from opto switch TTL 5V square wave output is independent of any analog or digital processing Digital Processing Processing Method Update rate for analog and digital outputs Techniques Mode 1 Slow Method 1 Processing modes run Frequency Count simultaneously and can be 0 RPM applied to either analog Mode 2 Fast Method lt 2000 RPM channel or accessed Period Count individually via a digital gt 2000 RPM RPM x 1 L RPM 1 2000 1 connection IR temperature sensor monitoring actual shaft temperature Temperature accuracy Reference temperature Ter 20 Operating range ATo Pt 5 Storage range ATs 20 to FO FS C Specifications Specifications TT Combined non linearity and 0 25 40 5 for 2 5Nm and below hysteresis Resolution EST Repeatability OO G ES RWT410 Series Transducers ONLY 20 C SM See 0 25 0 5 for 2 5Nm and below Note 4 3dB Bandwidth 312 default ave 16 RWT420 Series Transducers ONLY Digital averaging SeeNote5 2 4 2 32 6 18 N 0 a Note 4 3dB Bandwidth See Note 6 2500 1250 ee ME PE Analog output Output voltages Options available 1 5 10 Unipolar RWT410 Series default setting is 5Vdc Vdc Torque Speed Power RWT420 Series output voltages are user selectable Load impedance Maximum 1 Output currents Options available 4 20 0 20 12 8 mA Torque Speed Power RWT420 Series output currents are user sel
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