samlexpower VTC305 DC To DC Step Up Converter Owner’s Manual

: June 6, 2024
: samlexpower

Table of Contents

samlexpower VTC305 DC To DC Step Up Converter
INTRODUCTION
SPECIFICATIONS
IMPORTANT SAFETY INSTRUCTIONS
INSTALLATION
OPERATION
REMOTE CONTROL (OPTIONAL)
PROBLEM SOLVING
Limited Warranty
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

samlexpower VTC305 DC To DC Step Up Converter

INTRODUCTION

Step up a 12 VDC battery to between 13.5 and 17.0 or 24.0 and 27.5 VDC in 0.5 VDC increments (via 3 position DIP switch), or stabilize a 12 or 24 VDC power sys-tem. Safety features include reverse input protection, low input voltage alarm, low output voltage alarm, over-temperature shutdown and alarm, and output over voltage crowbar. If the input voltage exceeds the regulated output voltage, the unit simply passes the voltage through with full LC filtering and a single schottky diode drop (0.5 VDC or less). Optional features include a dry contact alarm relay output, and remote panel monitoring with On/Off control. Applications include temporarily brightening 12 volt headlights or work lights, increas-ing voltage into an automotive or marine ignition system for hotter spark and/or pre-vention of failures due to voltage drop during engine start, stabilizing 12 and 24 VDC power systems in marine, automotive or aeronautical environments and more.

SPECIFICATIONS

Model	VTC305-12-12	VTC305-12-24
Input Voltage	10.5 – 18 VDC	10.5 – 28 VDC
Output Voltage	Input – 1V or 13.5 – 17.0 VDC

Whichever is greater

| Input – 1V or 24.0 – 27.5 VDC

Whichever is greater

Alarm

Isolation

| Any Input or Output to Case 500VDC

Input to Output Common Negative

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS
This manual contains important safety and operating instructions for the converter. ALL CONVERTERS

CAUTION — To reduce risk of injury, charge only lead acid or sealed gel cell type rechargeable batteries. Other types of batteries may burst to cause personal injury and damage.
Do not expose the converter to rain or snow.
Use of an attachment not recommended or sold by the converter manufacturer may result in a risk of fire, electric shock, or injury to persons.
Do not disassemble the converter; take it to a qualified serviceman when service or repair is required. Incorrect reassembly may result in a risk of electric shock or fire.
To reduce the risk of electric shock, disconnect the converter from batteries or other DC supplies before attempting any maintenance or cleaning. Turning off controls will not reduce this risk.
CONVERTER LOCATION
- Never place converter directly above battery; gases from battery will corrode and damage the converter.
- Never allow battery acid to drip on the converter when reading gravity or filling the battery.
DC CONNECTION PRECAUTIONS
- Connect and disconnect DC output connections only after setting the converter switch to the off position.

Samlex America does not recommend the use of the VTC305 Series Voltage Converters in life support applications where failure or malfunction of this product can be reasonably expected to cause failure of the life support device or to significantly affect its safety or effectiveness. Samlex America does not recommend the use of any of its products in direct patient care. Examples of devices considered to be life support devices are neonatal oxygen analyzers, nerve stimulators (whether used for anesthesia, pain relief, or other purposes), auto-transfusion devices, blood pumps, defibrillators, arrhythmia detectors and alarms, pace-makers, hemodialysis systems, peritoneal dialysis systems, neonatal ventilator incuba-tors, ventilators for both adults and infants, anesthesia ventilators, and infusion pumps as well as any other devices designated as “critical” by the U.S. FDA.

INSTALLATION

Mount the unit in a DRY location. Allow at least 1 inch of clearance for adequate cooling.

POWER CONNECTION
The unit is supplied with three foot power input leads. This should normally be adequate to connect to a source of power. If you must extend the cable:

Use the smallest extension length possible.
Use no less than 10 gauge conductors.
Splice and solder the joints.
Protect the joints with heat shrink tubing.
Connect the wires as follows:
Red to Positive
Black to Negative

OUTPUT CONNECTIONS
Two positive output terminals and two negative output terminals are provided. Connect only one wire to each terminal. Ensure that the total average load connected does not exceed the continuous current rating of the unit.
Note that the current specifications are for input current. To obtain the maximum output current capability at any given input voltage, use the following formula:
Output Current = Input Volts / Output Volts x 27
For example:

10 VDC in and 27 VDC out, the max output current = 10/27 x 27 = 10.0 Amps.
20 VDC in and 27 VDC out, the max output current = 20/27 x 27 = 20.0 Amps

OPERATION

Turn the power switch on the front of the unit on to energize the outputs. To adjust the output voltage, turn off the power switch. Remove the plate from the top of the box. Reach in with a non-conductive device such as a pencil and open or close the dip switches as shown below to select the desired output voltage. Replace the plate. Turn the power switch on.

samlexpower VTC305 DC To DC Step Up Converter-fig2

BLACK PORTION INDICATES SWITCH IS PUSHED DOWN

Dry Contact Relay

To use your dry contact output fail relay you must connect a 9-pin D connector to the unit. You must use pins one and six as is indicated on page 7 in the remote connector diagram. The relay is factory preset to fail in the closed position when the low output LED and buzzer come on. If you wish to have the relay fail in the open position when the low output LED and buzzer come on, you must take the cover off the unit and move the jumper to the other position on J11. J11 is located next to the relay.

samlexpower VTC305 DC To DC Step Up Converter-fig3

To change the position of the jumper, first turn the unit off and disconnect the unit from both the input and output power. Next, turn the unit on for 30 seconds to discharge the capacitors, then turn it off again. Turn the unit upside down and remove the four screws. Remove the cover and locate J11. It will be next to the relay as is shown in the above diagram. Simply move the jumper to the desired position as is shown in the above diagram. Replace the cover and re-install the four screws. Reconnect the unit to the input and output power.

REMOTE CONTROL (OPTIONAL)

A remote control panel may be connected to the converter using a 9-pin D-connector, which attaches to the side of the converter. The remote control panel and D connector are part of the remote control option. The remote control panel allows the unit to be operated remotely as well as duplicating all the diagnostic indicators and audible alarm.

REMOTE CONNECTOR

This connector is located on the side of the unit.

samlexpower VTC305 DC To DC Step Up Converter-fig5

Note: All switches are electronic (solid state) not mechanical relays.

PROBLEM SOLVING

If the load exceeds the continuous rating for too long a period, the internal temperature sensor will cause the unit to stop boosting the input voltage until the unit has cooled down. After the unit has cooled down, normal operation will resume.
If the input voltage drops below the specified minimum input, the unit will sound the alarm.
If the output voltage drops below the specified minimum, the unit will sound the alarm.
If the current demanded by the devices connected to the unit exceed the maximum current rating, the fuse will blow.
If the fuse blows with no load connected, check that the power leads are connected to the battery with the correct polarity; if they are then the unit is damaged and must be returned for repair.

Limited Warranty

1. The equipment manufactured for Samlex America Inc. (the “Warrantor”) is warranted to be free from defects in workmanship and materials under normal use and service.
This warranty is in effect for:
- 3 Years from date of purchase by the end user .
Samlex America will determine eligibility for warranty from the date of purchase shown on the warranty card when returned within 30 days, or
- The date of shipment by Samlex America, or
- The date of manufacture coded in the serial number, or
- From a copy of the original purchase receipt showing the date of purchase by the user.
In case any part of the equipment proves to be defective, the Purchaser should do the following:
- Prepare a written statement of the nature of the defect to the best of the Purchasers knowledge, and include the date of purchase, the place of purchase, and the Purchasers name, address and telephone number.
- Call Samlex America at 800-561-5885 or 604-525-3836 and request a return material authorization number (RMA).
- Return the defective part or unit along with the statement at the Purchasers expense to the Warrantor; Samlex America
If upon the Warrantor’s examination the defect proves to be the result of defective material or workmanship, the equipment will be repaired or replaced at the Warrantor’s option without charge, and returned to the Purchaser at the Warrantor’s expense by the most economical means. Requests for a different method of return or special handling will incur additional charges and are the responsibility of the Pur-chaser.
Samlex America reserves the right to void the warranty if:
- Identification marks or serial numbers are removed or altered in any way.
- Our invoice is unpaid.
- The defect is the result of misuse, neglect, improper installation, environmental conditions, non-authorized repair, alteration or accident.
No refund of the purchase price will be granted to the Purchaser, unless the Warrantor is unable to remedy the defect after having a reasonable number of opportunities to do so.
Only the Warrantor shall perform warranty service. Any attempt to remedy the defect by anyone else shall render this warranty void.
There shall be no warranty for defects or damages caused by faulty installation or hook-up, abuse or misuse of the equipment including exposure to excessive heat, salt or fresh water spray, or water immersion except for equipment specifically stated to be waterproof.
No other express warranty is hereby given and there are no warranties that extend beyond those described herein. This warranty is expressly in lieu of any other expressed or implied warranties, including any implied warranty of merchantability, fitness for the ordinary purposes for which such goods are used, or fitness for a particular purpose, or any other obligations on the part of the Warrantor or its employees and representatives.
There shall be no responsibility or liability whatsoever on the part of the Warrantor or its employees and representatives for injury to any person or persons, or damage to property, or loss of income or profit, or any other consequential or resulting damage which may be claimed to have been incurred through the use or sale of the equipment, including any possible failure of malfunction of the equipment, or part thereof.
The Warrantor assumes no liability for incidental or consequential damages of any kind.