Specifications

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kele.com 888-397-5353 USA
March 2014
Supply Voltage 22-27 VDC, half-wave
Supply Current
VTI-1 50 mA
VTI-2 100 mA
Input 1-19 VDC range (1V minimum span)
or 4-40 mA range
Input Signal Loss threshold 0.7 VDC
Input Impedance
VTI-1 301 kΩ @ 1-19 VDC; 250Ω @ 4-40
mA with 4 mA minimum span; 500Ω
@ 2-38 mA with 2 mA minimum
span; 750Ω @ 1.3-25 mA with 1.33
mA minimum span
VTI-2 150 kΩ @ 1-19 VDC; 250Ω @ 4-40
mA with 4 mA minimum span; 500Ω
@ 2-38 mA with 2 mA minimum
span; 750Ω @ 1.3-25 mA with 1.33
mA minimum span
Wiring Terminations Screw terminals
Action Direct or reverse acting
Linearity <1% of span
Output
VTI-1 Single
VTI-2 Dual
Output Burden 850Ω maximum @ 24 VDC;
Rmaximum=(Vsupply - 7)/20 mA
Output Current 4-20 mA
Output Voltage Reference voltage 10 VDC @ 15 mA
maximum (1-19 VDC input), 6 VDC
@ 10 mA maximum (1-11 VDC input)
Operating Temperature 32° to 158°F (0° to 70°C)
Operating Humidity 5% to 95% RH (non-condensing)
Dimensions
VTI-1 1.8"H x 2.3"W x 0.8"D
(4.5 x 5.7 x 2.2 cm)
VTI-2 4.0"H x 2.3"W x 1.8"D
(10.2 x 5.7 x 4.5 cm)
Weight
VTI-1 2 oz (69 g)
VTI-2 6 oz (207 g)
RoHS Statement Ye s
Warranty 18 months
VOLTAGE & CURRENT CONVERTER / RESCALER
VTI SERIES
DESCRIPTION
The Kele VTI Series Voltage and Current Converter /
Rescaler will convert voltage signals in the range of 1-19V
or current signals in the range of 1.33-76 mA into a 4-20 mA
non-isolated signal. This current source signal can be direct
or reverse acting and can be used to drive grounded 4-20 mA
loads utilizing a single power supply. The VTI also accepts
an input from a resistive potentiometer. The VTI-1 is a single-
input, single-output device, and the VTI-2 accepts a single
input and provides dual outputs.
FEATURES
• Converts voltage, current or potentiometer signal into
4-20 mA signal
• Direct or reverse acting
• 6 or 10 VDC output reference voltage available 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
APPLICATION
• Voltage to current conversion
• Resistance to current conversion
• Current to current scaling
• Setpoint adjustment using potentiometer
• Signal duplication (one input/two outputs)
• Averaging of 4-20 mA loops
• Signal reversal
• Signal sequencing
SPECIFICATIONS
VTI-2-H VTI-1