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Table of Contents◗TENSION CONTROLSWeb ProductsRSD250 UNWIND DANCER PACKAGEIncludes all the essential components for state-of-the-art dancer arm control.Unwind Dancer PackageNexen's RSD250 Unwind Dancer Packageincludes all the essential components forstate-of-the-art dancer arm control. Preconfiguredfor unwind applications using apneumatic brake, this closed loop dancercontrol system features the RSD250 dancerposition controller, which automaticallyadapts to changes in roll size and inertia.The RSD250 is a modified version of theRSD200. The Communications Kit is notneeded for normal operations becausecalibration and tuning is accomplished withtwo potentiometers located on the PCboard. For more demanding applicationsthe Communications Kit can be used toconfigure calibration and tuning parametersfor more exacting control.Each RSD250 Package includes anRSD250 dancer controller, DPS60 dancerarm position sensor, EN50 pressure converter,air supply filter, air line tubing withfittings, and electrical cables with quickconnect fittings. This complete package,ideal for paper, film, foil, textiles, rubber,and wire applications, combines highperformance with easy installation.RSD250 Preconfigured System SimplifiesSetup and InstallationThe RSD250 Package comes preconfiguredfor unwind pneumatic brake applications,with essential setup parameters set.Installers simply calibrate the dancer armrange and select the start/stopped signalused on the machine. Tuning is also simplewith only two potentiometer adjustments.Once tuned and calibrated, it automaticallycompensates for tension disturbances.Adaptive Gain Ensures Optimal Tension ControlThe RSD250 Package features state-ofthe-arttechnology that actually takes intoaccount the changes in both roll diameterand inertia, compensating for these issuesbefore tension disturbances occur. Thiskeeps the dancer arm stable while maintainingconstant web tension.Smart SplicingReduces Roll WasteThe RSD250 quicklyadapts to new rollswithout causingtension disturbances,regardless ofdifferences in roll sizeor speed.All-Inclusive PackageIntegrates IndividualComponentsAir Supply360-1050 kPa[90-150 psig]120 or240 VACThe RSD250 Package is designedto take care of itself, requiring onlydancer arm feedback and a machinestart/stop signal to expertly adapt to anytension situation. Electrical connectionsbetween each component of the RSD250system are prewired; pneumaticFilterIncluded:RSD250ControllerPower SupplyDigitalInputsBrakeElectro-PneumaticTransducerCustomerSuppliedItemsDancerArmDPS DancerPosition SensorConnections feature tool-less quickconnect fittings, so making connections isfast and easy with little chance of error.Additional Features/Benefits• Simple setup and use• Adaptive gain control• Drive-like performance without the cost• Inertia and diameter based gain compensation• Super crawl: handles very small rolls and low speeds• Minimal sensor feedback needed• Automatically compensates for roll-diameter changes,egg-shaped rolls, and other tension disturbances• Low integration and startup costs• Only two potentiometer adjustments for tuning• Connectors provided on external components• All-in-one filter includedRSD250 SpecificationsPower Supply100 – 240 VAC, 12 VA, 50/60 HzAmbient Operating RSD250 0°C – 60°C [32°F – 140°F]Temperature Air Filter 4°C – 50°C [40°F – 120°F]Air SupplyEN50 & DigitalInputs CableDPS60 CableAir Line TubingProduct Numbers630 – 1050 kPa [90 – 150 psig]6,0 m [236 in] long4,5 m [180 in] long6,1 m [240 in] longRSD250 Unwind Dancer Package 964260RSD 200 Communications Software (Optional) 964527(Download from Nexen’s website)312