Analytic Systems VTC615R Manuale utente
INSTALLATION &
OPERATION MANUAL
VTC615R
ISOLATED
DC/DC VOLTAGE CONVERTER
8128 River Way, Delta B.C. V4G 1K5 Canada T. 604.946.9981 F. 604.946.9983 TF. 800.668.3884 (US/CANADA)
www.analyticsystems.com
An ISO9001 and AS9100 Registered Company Battery Chargers •Inverters •Power Supplies •Voltage Converters
Copyright (2005-2014) Analytic Systems Ware (1993) Ltd.
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IMPORTANT & SAFETY INSTRUCTIONS
1. SAVE THESE INSTRUCTIONS — This manual contains important safety and operating
instructions for this voltage converter.
2. Do not expose this voltage converter to rain or snow.
3. Use of an attachment not recommended or sold by the voltage converter manufacturer
may result in a risk of re, electric shock, or injury to persons.
4. Do not disassemble this voltage converter; take it to a qualied serviceman when service
or repair is required. Incorrect reassembly may result in a risk of electric shock or re.
5. To reduce risk of electric shock, disconnect this voltage converter from the source of
power before attempting any maintenance or cleaning. Turning off the controls will not
reduce this risk.
6. CONVERTER LOCATION
i. Never place converter directly above battery; gases from battery will corrode and dam-
age converter.
ii. Never allow battery acid to drip on converter when reading gravity or lling battery.
7. O/P CONNECTION PRECAUTIONS
Connect and disconnect DC output connections only after setting the I/P power switch
to the off position.
Analytic Systems does not recommend the use of the VTC615 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 signicantly affect its safety or effectiveness.
Analytic Systems 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), autotransfu-
sion devices, blood pumps, debrillators, arrhythmia detectors and alarms, pacemakers,
hemodialysis systems, peritoneal dialysis systems, neonatal ventilator incubators, 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.
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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 ltering 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.
Specications
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
Efciency > 85% @ Maximum Output
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** Actual startup is at 22, 32, 42, or 67Vdc Input, depending on model
* Specications subjects to change without notice.
Environment Specication
Operating Temp. Range -25° to +40°C @ maximum output
Derate Linearly 2.5% per °C from 40°C
(Optional -40°C extra wide temp. operation avail.)
Humidity 0 - 95°C Relative Humidity
(non-condensing) with optional conformal coating
Audible Noise NONE Ødb @ 3 ft (34.5 dB when fan operating)
Typical Service Life > 10 yrs. (87,600 hrs)
Isolation Input-Case & Input-Output 1500VDC (500V @ 24V I/P)
Output-Case 500VDC (1500VDC @ 48V O/P)
Mechanical Specication
Depth 13.5 in / 34.3 cm
Width 19.0 in / 48.3 cm
Height 2u (3.5 in.)
Material Marine Grade Aluminium
Finish Black Anodize
Fastenings All 18-8 Stainless Steel
Weight 12.0 lb / 5.5 kg
Connections Four contact output terminals
Warranty 3 years
Safety Designed to meet CSA 22.2.107.1 & UL458
Designed and manufactured by: ANALYTIC SYSTEMS WARE (1993) LTD.
8128 River Way
Delta, BC V4G 1K5 Canada
p. 604.946.9981 f. 604.946.9983
tf. 800.668.3884 US/Canada
6
MOUNTING
Mount the unit in a DRY location. Allow at least 4 inches of clearance around it for adequate
cooling.
POWER CONNECTION
The unit is supplied with power leads about 3 feet long. This should normally be adequate to
connect to a source of power. If you must extend the power leads, be sure to use at least a
good quality (typeTEW) AWG12 wire. The wire colours are
Red - Positive Black- Negative
Installation
measure the resistance between the two positive output terminals. If the diodes are present
the terminals will measure as not connected. If the diodes are NOT present, the terminals
will measure as a short circuit. Assuming the output isolation diodes are present, connect one
4 foot piece of #14 AWG red wire to each positive output terminal. Connect all the positive
wires to a distribution bus, or connect them together, and then connect from the common point
to the load using the correct gauge of wire for the total output capability of all the supplies
running in parallel. Repeat this process for the negative terminals using the same gauges of
wire, but black in colour. These units should now load share. You can conrm this by watching
the output ammeters. A slight difference is negligible, however, if this is not the case, you can
increase the output voltage of the unit that is reading low using the output adjust potentiom-
eter.
7
Turn the switch on the front of the unit on to energize the outputs. The green ‘Output On’
indicator light will glow to indicate the proper operation of the unit.
OUTPUT ADJUSTMENT
The unit has an adjustment potentiometer to allow up to ±1.0V adjustment of the output
voltage. This potentiometer is accessed through a small hole in the front of the voltage
converter. As shipped from the factory, the unit is preset for a voltage of 13.6, 27.2, 36.3
or 54.4VDC. Reach in with a very small at blade screwdriver to rotate the potentiometer.
Clockwise increases the output voltage and counter clockwise decreases it.
METERS
The meter shows simultaneous voltage and current. It features bright red LED readouts to
permit easy monitoring from many feet or meters away.
Operation
The dry contact output-fail relay is accessed through the small 3-connection terminal block at
the back of the converter. The user has a choice of using either the normally open or normally
closed contacts. To connect to the relay, connect one wire to the common (COM) terminal and
connect the other wire to either the normally open (NO) or the normally closed (NC) terminal.
Equalize Option
8
Troubleshooting
This unit provides LED indicators and a buzzer to help diagnose any problems. The unit should
sound the buzzer to alert you prior to shutting itself down. You should immediately check the
indicators to determine the cause of the shutdown.
LOW OUTPUT Indicates that the output voltage is below normal because:
The current demanded by the devices connected to the unit exceeds the
maximum output current rating, thereby causing the output voltage to drop
to maintain the current at the maximum level,
The input voltage is not high enough for unit to operate,
LOW INPUT Indicates that the input voltage is below normal because:
The input voltage is not in the correct range for proper operation of the unit.
OVERTEMP Indicates that the voltage converter is running too hot because:
Too much power is being drawn, turn off or unplug some devices.
The voltage converter is located in a poorly ventilated area.
If the load exceeds the continuous rating for too long a period, the temperature sensor inside
the unit will turn off the outputs. After the unit cools sufciently, it will automatically come
back on. If this happens frequently, remount the unit for increased airow so it cools better.
9
Special Services & Options
Conformal Coating INCLUDED ON ALL UNITS UNLESS REQUESTED NOT TO as of April 1, 2014
Option “c” Ruggedization Package (EXTRA Conformal Coating and RTV Compound)
Option “v” Marine / Industrial Pkg (EXTRA Conformal dipping and RTV Compound)
Option “MS” Military Pkg
(incl. Wide Temp Components, Conformal Dipping and RTV Compound)
Option “w” Wide Temperature Operation (-40 to +55 C, incl)
Option “SM” High Voltage Protection on the DC Input Side
Option “d” Paralleling Diodes
Option “FI” Forklift Modications
Option “F” Open Frame - No chassis just heat sink bars (not for all products)
Special Input There is no charge for nominal output voltages (ie. 12.0, 24.0, 48.0), but this
must be noted at the time of order (Contact Factory for details)
Special Output
Water tight options IP66, IPS67, IPS68
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