TRANSDUCERS - Kele

TRANSDUCERSVOLTAGE AND CURRENT CONVERTER / RESCALERMODEL VTIDESCRIPTIONThe Model VTI Voltage and Current Converter/Rescaler will convert voltage signals in the range of1-19V or current signals in the range of 1.33-76 mAinto a 4-20 mA non-isolated signal. This current-sourcesignal can be direct or reverse acting and can be usedto drive grounded 4-20 mA loads utilizing a single powersupply. The Model VTI also accepts an input from aresistive potentiometer. The Model VTI-1 is a singleinput,single-output device, and the Model VTI-2accepts a single input and provides dual outputs.VTI-2-HVTI-1FEATURESAPPLICATION• Converts voltage, current, or potentiometer signalinto 4-20 mA signal• Direct or reverse acting• 6 or 10 VDC output reference voltageavailable to power input device• Loss of input signal results in 0 mA output• LED indication of valid input signal (VTI-1)• Dual output model• Independently configurable outputs• Voltage to current conversion• Current to current scaling• Setpoint adjustment using potentiometer• Signal duplication (one input/two outputs)• Resistance to current conversion• Averaging of 4-20 mA loops• Signal reversal• Signal sequencingTRANSDUCERSSPECIFICATIONSPower supplyInput rangesVTI-1VTI-2Input signal lossthreshold 0.7 VDCOutput range 4-20 mAOutput load22-27 VDC @ 50 mA (VTI-2:100 mA)(10V reference voltage output)15-27 VDC @ 50 mA (VTI-2:100 mA)(6V reference voltage output)1-19 VDC, 1V min span,301 kΩ input impedance150 kΩ input impedance4-76 mA, 4 mA min span,250Ω input impedance2-38 mA, 2 mA min span,500Ω input impedance1.33-25 mA, 1.33 mA min span,750Ω input impedance850Ω max @ 24 VDCRmax = Vsupply - 720 mALinearity

TRANSDUCERSVOLTAGE AND CURRENT CONVERTER / RESCALERMODEL VTITYPICAL APPLICATIONS24 VDCPower Supply(blue)VTIV SIG INIncrease24 VDCPower Supply(blue)Locate VTI closeto potentiometerto minimize noisepickup.VTI with XR1V SIG INVoltage orCurrent Signal(white)(black)(purple)(no connection)(yellow)4-20 mA+ 24V PWRCOMREF V OUTMA SIG OUTUCM-SPA or PotentiometerSensor - anyend-to-end value from100Ω to 10 kΩ. Specifypot range whenordering.(red)UAD-R1(black)(white)(black)(purple)(yellow)4-20 mA+ 24V PWRCOMREF V OUTMA SIG OUT4-20 mA OutputFor signal reversal (20-4 mA OUT), specify reverse acting when ordering.Voltage to Current,Current to Current, and Signal Reversal24 VDCPowerSupply4-20 mAOutputUsing a Potentiometer to Vary a4-20 mA Signal24 VDCPowerSupplyTRANSDUCERSVoltageorCurrentSignal(blue)(white)(black)(purple)(no connection)(yellow)(brown)VTI-2V SIG IN+ 24V PWRCOMREF V OUTMA SIG OUT #1MA SIG OUT #2VoltageorCurrentSignal(blue)(white)(black)(purple)(no connection)(yellow)(brown)VTI-2V SIG IN+ 24V PWRCOMREF V OUTMA SIG OUT #1MA SIG OUT #24-20 mAOutput #14-20 mAOutput #14-20 mAOutput #2Example: One 4-20 mA input becomes two identical 4-20 mA outputs.Signal Duplication4-20 mAOutput #2Example: Output #1 is 4-20 mA over a 4-12 mA (1-3V) input.Output #2 is 4-20 mA over a 12-20 mA (3-5V) input.Signal SequencingORDERING INFORMATIONMODELVTI-1VTI-2DESCRIPTIONVoltage and current converter/rescaler, single output*Voltage and current converter/rescaler, dual output*ENCLOSURE- Leave blank for snap-track mounting (VTI-1 only)H 1/2'' Threaded hub mountP Panel mountD DIN rail mountOPTIONS-XR1 Potentiometer to current converter(includes UAD-R1, potentiometer not included)* Important! The VTI isnot intended for fieldcalibration and must befactory-calibrated.Please supply thefollowing information attime of order: input,output, and direct orreverse acting.Example: VTI-1-XR1 Potentiometer to current converter, snap-track mounted846RELATED PRODUCTSUCM-SPA 0-10 kΩ three-wire pot with stainless steel plate2008 KELE CATALOG • www.kele.com • USA 888-397-5353 • International 901-382-6084