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Programmable DC-DC Converter with Battery Charger function
1.
INTRODUCTION
This MCU controlled Step Down DC-DC Converter has a digitally adjustable output in 0.2V increments.
This unit can also be set up and used as a Two Stage Battery Charger.
Output voltage and current are displayed in turn or selectively by the LED display.
8 fault codes can be displayed for different fault diagnosis by the LED display.
Intended Applications
*
Ideal for voltage sensitive loads, devices and equipment that are distant from the DC source.
*
Remote Automatic or Manual On/ Off Control of the output makes it ideal for various DC power and DC
management applications.
*
Suitable for on-board charging of stand-alone 12V Battery Bank or a Battery with load.
2.
FEATURES
1.
Digitally adjustable output voltage in 0.2 V increments (12V-15V DC) makes this unit ideal
to operate voltage sensitive devices.
2.
2 stage Battery Charger mode with 14.3V Bulk and 13.6V Float charge.
3.
3 digit LED display for displaying Voltage, Current, Operation Mode and Protection/ Fault Diagnosis.
4.
Remote Control Terminal for Manual or Automatic On/Off control of the output power.
5.
Remote Voltage Sensing for optimal and accurate powering of distant load or charging of a battery.
6.
Remote alarm terminal (12V, 0.25A) for powering external warning device when input is under 42V.
7.
A separate always-on auxiliary output (12V, 0.5A) to power critical electronic devices such as security
device or remote On/Off manual switch.
8.
Fail-save protection, with 7 self-recoverable and all with fault code on LED display.
9.
Thermostatic control cooling fan.
3.
CAUTION
1.
When an inductive load such as motor or a solenoid is used, a diode (400V, 3Amp) must be installed
across the load as shown in (Connection Diagram 1). This will protect the converter from the high
voltage spike generated by the load when the supplied current is being switched OFF.
2.
When the fuse is blown, repair the problem and then replace the fuse with the same type and rating.
3.
Avoid touching the heat sink during operation as it may burn you.
VC-4820
USER'S MANUAL
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Summary of Contents for Voltech VC-4820
- Page 1 VC-4820 Programmable DC-DC Converter with Battery Charger function USER'S MANUAL INTRODUCTION This MCU controlled Step Down DC-DC Converter has a digitally adjustable output in 0.2V increments. This unit can also be set up and used as a Two Stage Battery Charger.
- Page 2 PANEL VIEW 3 digit LED. Displays voltage, current, operation and fault code. LED indicates Voltage (V) and Current (A). Battery Icon is on when converter is set at the charger mode. SET button. INPUT, OUTPUT, CONTROL & AUXILARY TERMINALS VIEW Remote Remote Terminal for Automatic / Manual control of Output On-Off 12V 0.5A...
- Page 3 Wiring Diagram 6.1 Connection Diagram 1 Example 1 Example 2 Example 3...
- Page 4 6.2 Connection Diagram 2 INITIAL SET UP AND CONNECTION Leave the output terminals disconnected. Connect a 48V battery to the input terminals. DOUBLE CHECK FOR CORRECT POLARITY BEFORE CONNECTION. Programming Procedure using the SET button Press and hold the SET button until shows up and display flashes. Flashing digits indicate unit is in programmable mode.
- Page 5 REMOTE TERMINAL FOR AUTOMATIC / MANUAL OUTPUT ON-OFF CONTROL The DC-DC Converter can be set to control the output Manually or Automatically. Application of the Remote Control Terminal: The converter can be set to manual control of the output via external switch The remote On/Off function can be controlled via many types of On/Off switches and with various DC sources between 8V-32V.
- Page 6 GENERAL OPERATION LED Display During operation, the LED display will display sequentially Voltage and Amps. A quick press of the SET button will either hold the display (at desired V, A) or return to the default scrolling mode. The display will switch off after 5 minutes to conserve the energy. Display can be restarted by a quick press of the SET button.
- Page 7 10. BATTERY CHARGER MODE - TWO STAGE CHARGER When the unit is set in Charger Mode, LED Displays and the charger icon will be lit up to confirm the Charger is in operation. Bulk Charge is set at constant current of 20A and voltage at 14.3V. Float Charge voltage is set at 13.6V. The Charger Icon flashes in Bulk Charge and becomes constant in Float Charge.
- Page 8 12. TO ACTIVATE AND DEACTIVATE REMOTE CONTROL MODE The Remote control terminal is disabled by default at the factory and the output is always on. To enable the Remote Control Mode, apply a positive 8 to 32VDC to Remote terminal. After Remote Control Mode has been enabled it will stay enabled until it is disabled or reset to factory default setting in 12.
- Page 9 19. Troubleshooting If no display comes up after connection to the input, check for correct input polarity. Disconnect all cables to the unit and check the input fuse. The LED will display an error code when the converter is in any protection mode. The following table denotes the 8 Error Codes.
- Page 10 20. SPECIFICATIONS Models VC-4820 Input Voltage Range 38 - 60VDC 12 – 15VDC (0.2V increments) Output Voltage Range Continuous Output Current No load current < 60mA ≥ 90% Efficiency Protections Over Voltage, Overload, Input Reverse Polarity, Over Temperature, Output Reverse Polarity, Output Short Circuit, Input Under Voltage Aux.
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