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Manual
EN
Appendix
Buck-Boost DC-DC converter
25A and 50A
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Contents
1. General Description
1.1 Applications
1.2 General features
2. Connections
3. LED indicators
4. Engine running detection
5. Charge current limiter
6. Freely programmable (engine running detection and connected users)
7. Wiring diagram
8. ConverterMonitor PC application
9. Technical specifications
1. General Description
The Buck-Boost DC-DC convert will charge a 12V or 24V service battery in vehicles with a smart
alternator. The converter charges the auxiliary battery with a pre-set charge voltage, eliminating high
voltages (e.g. Mercedes: 15,4V) and low voltages.
1.1 Applications
• Controlled charging of the service battery
• Automatic activation and deactivation of electric devices in vehicles controlled by a unique
engine running detection protocol (no annoying cables).
1.2 General features
• Buck-Boost converter can be fully programmed
• Suitable for all types of batteries
• Compact size
• Input voltage 10-30 VDC
• Output voltage 2-30 VDC (12/24 VDC variable settings)
• Adjustable current limiter
• Temperature monitoring
• Automatic activation when engine running
• LED status indicators
• Battery monitor by means of 2 RGB LEDs
• M8 connections
• Output for activation/deactivation of loads
• USB for configuration/monitoring
• Built-in Lithium battery low-voltage protection
• Two converters can be connected parallel when the settings are identical
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2. Connections
The converter has three M8 bolt connectors for in- and output power, a two wire connector that can
be used as inputs or outputs and an USB connector to connect to a computer to configure the device.
IN Converter input (dynamo/starting battery)
GND GROUND (chassis)
OUT Converter output (additional battery)
Pin 1 Input/output (purple wire)
Pin 2 Input/output (green wire)
USB connection for configuring the converter
3. LED indicators
The Buck-Boost DC-DC converter has two RGB LEDs.
The IN LED has the following functions:
Green: converter ON (by the engine running detection system or by voltage on pin 1).
Yellow: converter OFF, the input voltage is lower than the set low voltage shut down threshold.
Red: converter OFF, over temperature.
Blue, quick flash: the engine running detection is active, the converter will turn ON after a delay.
Blue, slow flash: the converter is OFF and activation is blocked due to low input voltage.
The OUT LED has the following functions:
Green: converter OFF, battery voltage OK.
Yellow: converter OFF, batter y volt age low.
Red: converter OFF, battery completely discharged or not connected.
Purple: converter ON and is supplying power to the battery and/or the electrical users which are
connected.
Output LED Indicator Input LED Indicator
OUT
GND
PIN 1
IN
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4. Engine running detection
The converter has a unique engine running detection system. This prevents the converter from
discharging the starter battery if no power is being supplied by the alternat or . T he c onvert er turns ON
when the engine is running and the input voltage exceeds the pre-set voltage.
5. Charge current limiter
The output current is determined by the following factors:
Setting: the maximum required charge current is set via the USB connection (with the Windows
ConvertorMonitor application)
Temperature: if the internal converter temperature attains the maximum temperature setting, the
charge current is automatically limited so that the internal temperature never becomes
impermissibly high.
Input current: the maximum input current is set via the USB connection (with the Windows
ConvertorMonitor application). The maximum input current setting prevents the starter
battery and/or the alternator from being overloaded. This also facilitates the choice of
cable diameter and fuse.
6. Freely programmable (engine running detection and connected users)
P1 enables you to define the engine running detection system in a number of ways. P1 is the Purple
wire.
P2 enables you to programme activation and deactivation of connected users. P2 is the green wire.
7. Wiring diagram
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8. ConverterMonitor PC application
With the ConverterMonitor pc program it is possible to monitor the live values of the converter:
- Input voltage
- Output voltage and current
- Temperature
It is also possible to configure the converter by setting various parameters:
- Output voltage
- Maximum input and output current
- Maximum temperature
- Under voltage threshold
- Power save mode timer
- Battery levels
- Motor detection settings
- How the 2 input/output pins are used
This screenshot of the ConverterMonitor application shows the s tatus and the pa r ameters that can be
configured.
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9. Technical specifications
Buck-Boost DC-DC
Converter
25A 50A
Input voltage range
7-35V
Under voltage threshold
10V
Output voltage range
2-30V
Maximum charge current
12V : 25A 24V : 15A
12V : 50A 24V : 25A
Power consumption
Converter off, LEDs off (power
save mode)
7mA
On/off input (pin 1, purple wire)
‘On’ threshold voltage
> 2V
Maximum input voltage
60V
Output pin 1 and pin 2
Output voltage if activated
Vpinout = Vin
Maximum current (per pin)
Ipinout = 1 A
GENERAL
Operating temperature range
-25 +80°C
Ambient temperature
Max current: up to 40°C
Weight
1kg
1,1kg
Dimensions
165 x 120 x 30 mm
213 x 120 x 30 mm
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Victron Energy Blue Power
Distributor:
Serial number:
Version : 01
Date : 21 March, 2016
Victron Energy B.V.
De Paal 35 | 1351 JG Almere
PO Box 50016 | 1305 AA Almere | The Netherlands
General phone : +31 (0)36 535 97 00
Customer support desk : +31 (0)36 535 97 03
Fax : +31 (0)36 535 97 40
E-mail : sales@victronenergy.com
www.victronenergy.com
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