Analytic Systems VTC615R, Installation & Operation Manual, Page: 4 / 12

4
Introduction
The model VTC615R Rackmount Voltage Converter supplies either 12V, 24V, or 48 VDC from a
24V, 48V or 72VDC power source.
All new Current Mode switching design offers increased power and reliability in a compact
package. Extra input and output filtering reduce EMI to extremely low levels. Reliability
features include an input fuse, thermal shutdown, current limiting, reverse battery hookup
protection and output short circuit shutdown with automatic recovery. The output voltage is
easily adjusted 1.0 volts above or below the standard output voltage. Devices connected to
the converter
are protected by an output overvoltage crowbar circuit.
All rackmount units come standard with High quality digital output meters to allow monitoring
of output current and output voltage. An optional Battery Back-up is also available.
Specifications
Electrical (Input)
Nominal (ip) 24 36 48 72
Actual (Vdc) 20-35 **30-45 40-60 65-90
Input Amps (max) 39.5 27.1 20.3 12.6
Input Fuse (ATC) 3 x 15 2 x ATC-15 1 x 25 1 x 20
Noise on Input < 50 mV
Electrical (Output)
Output Nominal (op) 12 24 48
Output Volts (DC) 13.6 ± 0.05 27.2 ± 0.05 54.4 ± 0.05
Output Amps 40 cont. / 45 peak 20 cont. / 25 peak 10 cont. / 12.5 peak
Output Crowbar 16.0 ± 0.5V 32.0 ± 1.0V 63.9 ± 2.0V
Output Adjustment ± 1.0 V
Switching Frequency 60 ± 2.0 KHz
Idle Power < 10 Watts
Output Ripple & Noise < 10 Watts
Transient Response < 2V for 50% Surge (Output Amps/2)
Regulation (Line & Load) < +/- 0.5%
Duty Cycle Peak 20% for 10 min max
Continuous 100% for 24 hours per day
Efficiency > 85% @ Maximum Output