Samplexpower Vtc305-12-12 User manual

Owner's

Manual

Please read this

manual before

operating your

converter

DC to DC

Step Up

Converter

Model:

VTC305

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

Specifications subject to change without notice.

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

Current Limit

30 Amps In

Output Crowbar

16.0 ±0.5 V 32.0 ±1.0 V

Input Fuse

AGC 20 x 2 Amp

Low Input Voltage

Alarm

10.5 VDC

Low Output Voltage

Alarm

Programmmed Output Volt-

age minus 2.5 VDC

Noise on Input

< 25 milli-volts

Noise on Output

< 25 milli-volts

Transient Resp.

< 1V for 15A Surge

Efficiency

> 90 % @ maximum output

Temp. Range

0 - 40 deg°C @ maximum

output

Isolation

Any Input or Output to Case

500VDC

Input to Output Common

Negative

Length

9.1 in / 23.1 cm

Width

7.8 in / 19.8 cm

Height

2.5 in / 6.4 cm

Clearance

1 Inch (2.5 cm) all around

Material

Marine Grade Aluminum

Finish

Black Powder Epoxy

Fastenings

18-8 Stainless

Weight

4.0 lb / 1.8 kg.

REMOTE CONTROL (OPTIONAL)

A remote control panel may be connected to the con-

verter 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 re-

motely as well as duplicating all the diagnostic indicators

and audible alarm.

REMOTE CONNECTOR

This connector is located on the side of the unit.

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

DRY CONTACT

ALARM RELAY

DRY CONTACT

ALARM RELAY

GROUND

COMMON FOR SWITCHES

REFERENCE VOLTAGE

FOR REMOTE OFF

+12 VDC

REMOTE OFF

CONNECT TO 5 TO FORCE

UNIT TO OFF

OVER TEMP

NORMALLY HIGH (+12V)

GOES LOW ON

OVER TEMPERATURE

LOW INPUT

NORMALLY HIGH (+12V)

GOES LOW WHEN

INPUT GOES LOW

OVERLOAD

NORMALLY HIGH (+12V)

GOES LOW WHEN

UNIT OVERLOADED

LOW OUTPUT

NORMALLY HIGH (+12V)

GOES LOW WHEN

LOWOUTPUT GOES

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.

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 dia-

gram. Replace the cover and re-install the four screws. Reconnect the unit to the input

and output power.

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS — This manual contains important safety and operating

instructions for the converter.

ALL CONVERTERS

1) CAUTION — To reduce risk of injury, charge only lead acid or sealed gel cell

type rechargeable batteries. Other types of batteries may burst causing per-

sonal injury and damage.

2) Do not expose converter to rain or snow.

3) Use of an attachment not recommended or sold by the converter manufac-

turer may result in a risk of fire, electric shock, or injury to persons.

4) Do not disassemble 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.

5) To reduce risk of electric shock, disconnect converter from batteries or other

DC supply before attempting any maintenance or cleaning. Turning off controls

will not reduce this risk.

6) CONVERTER LOCATION

i) Never place converter directly above battery; gases from battery will

corrode and damage converter.

ii) Never allow battery acid to drip on converter when reading gravity or

filling battery.

7) DC CONNECTION PRECAUTIONS

i) Connect and disconnect DC output connections only after setting

converter switch to off position.

Samlex America does not recommend the use of the VTC305 Series Voltage Convert-

ers in life support applications where failure or malfunction of this product can be rea-

sonably 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 analyz-

ers, 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

MOUNTING

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 con-

nect 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 continu-

ous 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.

MINIMUM

BLACK PORTION INDICATES SWITCH IS PUSHED DOWN

+0.5V +1.0V +1.5V +2.0V +2.5V +3.0V +3.5V

PROBLEM SOLVING

• If the load exceeds the continuous rating for too long a period, the internal tem-

perature 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 maxi-

mum current rating, the fuse will blow.

• If the fuse blows with no load connected, check that the power leads are con-

nected to the battery with the correct polarity; if they are then the unit is damaged

and must be returned for repair.