friction clutches - Arten Freios e Embreagens Industriais

Table of Contents◗TENSION CONTROLSWeb ProductsHow the TC820 Tension Controller works.The TC 820 Tension Controllerreceives an input signal fromone or two Nexen tension sensors.These sensors can beLVDT or strain gauge-type sensors.The controller amplifiesand adds both these signal valuestogether. The sum of thesecombined signals is then comparedto the desired setpointtension level. The differencebetween these two signals isthe “deviation.” The TC 820reduces the deviation to zero byincreasing or decreasing theoutput signal.Two tension sensors are normallyplaced one on either endof a sensing roll. This eliminateserrors caused by a difference intension from one side of theweb to the other. Narrow websensing can be done using onlyone sensor.You choose whether the outputsignal is 4-20, mA, or 0-10VDC depending on the needsof the interface element. The 4-20 mA signal is used with theNexen Electro-PneumaticConverters, which vary outputair pressure in direct relation tothe variable input signal fromthe TC 820. This output airpressure can be used to actuatea pneumatic brake, clutch ormotor. The 4-20 mA or 0-10VDC output signal can interfacewith variable speed motors,controllers, or other elementssuch as the power supply forelectric brakes or clutches.ApplicationsUnwind ControlCenter Wind Drive ControlCenter Wind Clutch ControlUNWIND BRAKEWEBWINDINGCLUTCHThis roll required tomaintain constant angleover sensor rollWEBTENSION SENSORSWEBTENSION SENSORSMOTORMOTORCONTROLTENSIONSENSORSThis roll required tomaintain constant angleover sensor rollInterfaceElementTC 820TC 820TC 820InterfaceElementMid-process ControlDimensionsWEBTENSION SENSORSMOTORCONTROLTC 820Selection Chart296PRODUCTNUMBER964350TENSION RANGE 0.5 — 5000SETTINGS (Pounds, Newtons or Kilograms)POWER SUPPLY 100-240 V AC, 50/60 HzPOWER100 VACONSUMPTIONAMBIENT 32-122° F (0-50° C)TEMPERATURESHIPPING WT. 8.0 lbs. (3,6 kg)CONTROL 0-10V (