Lamarche 143459 User manual

106 Bradrock Dr. Des Plaines, IL 60018-1967
CPN 143459
Instruction Drawing Number: P25-LDCC-1
Tel: [phone]
Fax: [phone]
Revision A00
Rev. Date: 09/20
ECN:22665
This manual is subject to change without notice. You may obtain the newest version of the manual at www.lamarchemfg.com
La Marche Manufacturing Company |www.lamarchemfg.com
DC-DC Converter
Installation and Operation Manual

i
Important Safety Instructions
Before using this equipment, read all manuals and other documents related to this converter and other equipment
connected to this unit. Always have a copy of the DC-DC converter’s manual on file nearby, in a safe place; if a
replacement copy of a manual is needed, it can be found at www.lamarchemfg.com.
Electrical Safety
WARNING: Hazardous voltages are present at the input of systems. The output from the converter
and batteries may be low in voltage but can have a very high current capacity that may cause severe
or even fatal injury.
When working with any live battery or power system, follow these precautions:
•Never work alone on any live power system, someone should always be close enough to come to your aid.
•Remove personal metal items such as rings, bracelets, necklaces, and watches.
•Wear complete eye protection (with side shields) and clothing protection.
•Always wear gloves and use insulated hand tools.
WARNING: Lethal voltages are present within the power system. Parts inside the unit may still be
energized even when the unit has been disconnected from the DC input power. Check with a meter
before proceeding. Do not touch any parts that are not insulated.
•A licensed electrician should be used in the installation of any unit.
•Always disconnect the unit from the supply, batteries, and loads before performing maintenance or cleaning.
•If the unit is hot-swappable, simply remove it from the shelf for any maintenance or cleaning.
•Always assume that an electrical connection is live and check the connection relative to the ground.
•Be sure that neither liquids nor any wet material come in contact with any internal components.
•Do not operate this unit outside the input and output ratings listed on the unit nameplate.
•Do not use this unit for any purpose not described in the operation manual.
Mechanical Safety
•This unit or parts of the unit may get very hot during normal operation, use care when working nearby.
•Do not expose equipment to rain or snow. Always install in a clean, dry location.
•Do not operate the equipment if it has received a sharp blow, been dropped, or otherwise damaged in any
way.
•Do not disassemble this unit. Incorrect re-assembly may result in a risk of electric shock or fire.
Battery Safety
WARNING: Follow all of the battery manufacturer’s safety recommendations when working with or
around battery systems. DO NOT smoke or introduce a spark or open flame in the vicinity of a battery.
Some batteries generate explosive gases during normal battery operation.
•To reduce the risk of arc, connect, and disconnect the battery only when the unit is off.
•If it is necessary to remove the battery connections, always remove the grounded terminal from the battery
first.
•Remove personal metal items such as rings, bracelets, necklaces, and watches.
•Always wear rubber gloves, safety glasses, and a rubber-lined vest/apron when working near a battery.
•Have plenty of freshwater and soap nearby in case the battery electrolyte contacts skin, clothing, or eyes.
•If the battery electrolyte contacts skin or clothing, wash immediately with soap and water.
•If the electrolyte enters the eye, immediately flood the eye with running cold water for at least ten (10) minutes
and seek medical attention immediately.
•Do not drop metal on a battery. A spark or short-circuit could occur and could cause an explosion.

ii
Unit Location
•Allow at least 6 inches of free air on all vented surfaces for proper cooling.
•Do not operate this unit in a closed-in area or restrict ventilation in any way.
•Do not set any battery on top of this unit.
•Never allow battery electrolyte to drip on this unit when reading the specific gravity or filling the battery.
•Never place this unit directly above a standard flooded battery. Gases from the battery will corrode and damage
equipment.
•A sealed maintenance-free or valve-regulated lead-acid (VRLA) battery may be placed below this equipment.
Check for Damages
Before unpacking the product, note any damage to the shipping container and take pictures. Unpack the product
and inspect the exterior and interior of the product for damage. If any damage is observed, take pictures and
contact the carrier immediately to file a damage claim. Contact La Marche for a Return Material Authorization
number to have the inverter sent back for evaluation and repair.
CAUTION: Failure to properly file a claim for shipping damages or provide a copy of the claim to La
Marche, may void warranty service for any physical damages reported for repair.
Returns for Service
Save the original shipping container. If the product needs to be returned for service, it should be packaged in its
original shipping container. If the original container is damaged/unavailable, make sure the product is packed
with at least three inches of shock-absorbing material to prevent shipping damage. La Marche is not responsible
for damage caused by improper packaging of returned products.
Inspection Checklist
The enclosure exterior and interior are not marred or dented.
No visible damage to the components.
All hardware and connections are tight.
All wire terminations are secure.
All items on the packing list have been included.
Handling
Equipment can be very heavy with uneven distribution of weight. Use adequate manpower or equipment for
handling. Until the equipment is securely mounted, care must be used to prevent equipment from being
accidentally tipped over or dropped.

iii
Table of Contents
Important Safety Instructions ........................................................................................................................ i
Table of Contents ........................................................................................................................................iii
Table of Figures...........................................................................................................................................iii
Model Scope/General Description.................................................................................................................. 1
Understanding Model Number ...................................................................................................................... 1
Optional Accessories Included in the Inverter ................................................................................................ 1
1.0 Equipment Handling.......................................................................................................................... 2
1.1 Storing the DCC ............................................................................................................................ 2
2.0 Installation ....................................................................................................................................... 2
2.1 Mounting the DCC......................................................................................................................... 2
2.1.1 Rack-Mounting the DCC ......................................................................................................... 2
2.2 Electrical Connections.................................................................................................................... 2
2.2.1 Input Wiring .......................................................................................................................... 2
2.2.2 Output Wiring........................................................................................................................ 3
3.0 Operation......................................................................................................................................... 3
3.1 Start-Up Sequence ........................................................................................................................ 3
3.2 Front Panel (Switch, LED and Alarm) Details ................................................................................... 3
3.3 Rear Panel Details ........................................................................................................................ 4
3.4 Parallel Operation ......................................................................................................................... 5
4.0 Troubleshoot ................................................................................................................................... 5
Appendix A: Technical Specifications............................................................................................................. 6
Appendix B: Power Cabling Guide ................................................................................................................. 7
Appendix C: Manufacturer’s Warranty ........................................................................................................... 8
Appendix D: Document Control and Revision History...................................................................................... 9
Table of Figures
Figure 1 –DC-DC Converter Overview .......................................................................................................... 1
Figure 2 –Rack Mounting Dimensions........................................................................................................... 2
Figure 3 –DC Input and DC Output connection to the DCC ............................................................................ 3
Figure 4 –Front Panel Detail ....................................................................................................................... 3
Table 1 –Front Panel Detail ........................................................................................................................ 4
Figure 5 –Rear Panel Detail ......................................................................................................................... 4
Table 2 –Rear Panel Detail .......................................................................................................................... 4
Figure 6 –Parallel Connection ..................................................................................................................... 5
Table 3 –Troubleshooting details ............................................................................................................... 5
Table 4 –Wire size / Area Detail .................................................................................................................. 7

1
Model Scope/General Description
DC-DC Converter is specially designed for meeting the requirements of all kinds of communication and electric
power products. DC-DC Converter adopts the high-frequency switching technology including high accuracy voltage
stabilizing, low output noise, strong capacity of resisting disturbance, small volume, lightweight, etc. DC-DC
Converter is the ideal configuration supplying power to the communication equipment of different voltage grades.
Figure 1 –DC-DC Converter Overview
Understanding the Model Number
The DCC model number is coded to describe the features that are included. Find the model number on the
nomenclature nameplate of the enclosure. Follow the chart below to determine the configuration of the converter.
Optional Accessories Included in the Converter
This inverter may have been outfitted with several optional accessories or option packages. To determine the
options included (if any) refer to the cover page of the manual package. If the manual package that is included
with the inverter is no longer available, contact La Marche and provide the model or serial number to receive a
list of the included accessories.

2
1.0 Equipment Handling
1.1 Storing the DCC
If the DCC is to be stored for more than a few days after delivery, it should be stored within its shipping container.
The location chosen for storage should be within an ambient temperature of -40 to 185° F (-40 to 85° C) with a
non-condensing relative humidity of 5 to 95%. Storage should not exceed 6 months due to the limited shelf life
of the filter capacitors when they are not in service.
2.0 Installation
2.1 Mounting the DCC
The DCC is available with mounting holes, can be fit for 19” rack mounting. When mounting the DCC in any
configuration, consider the size and weight of the converter. The rack must be able to support the weight of the
converter, as well as an additional safety factor. Refer to Table 1 to verify the weight of the converter. The location
chosen for the converter should be within an ambient temperature range of 14˚F to 122˚F (-10˚C to 50˚C) with
a non-condensing relative humidity no higher than 95%. The converter should be mounted in an area free of
explosive materials and away from any liquids. Avoid using equipment in a location with corrosive gases (e.g.
over flooded Lead Acid batteries) and dust. The DCC utilizes fan-assisted cooling, so clearance of at least 6 inches
of free air must be maintained in front and on top for proper cooling. Maintain 12 inches (300 mm) or more of
clearance at the rear of the converter when rack mounting to allow for operation and maintenance. The preferred
fastener is a machine bolt backed with a flat washer, lock washer, and nut. All hardware should be corrosion-
resistant.
2.1.1 Rack-Mounting the DCC
The DCC enclosure can be rack mounted on a standard 19/23” rack. For the rack-mounting installation dimension,
seen in Figure 2. Flush mount the DCC enclosure to the relay rack.
Figure 2 –Rack Mounting Dimensions
2.2 Electrical Connections
Before beginning any work on the converter, ensure that all incoming and output power is de-energized. Verify
that no voltage is present by using a voltmeter at all input and output terminals. Check that the voltage matches
the converter front nameplate specifications. Select wire size using the table below.
2.2.1 Input Wiring
WARNING: Connecting the battery to the Converter may cause a spark at the point of connection. There
is a RISK OF EXPLOSION in hazardous areas or locations where explosive gases have accumulated.

3
Access the rear of the Converter and locate the DC Input connection terminal. Connect DC wiring to the Converter
per Figure 4. Refer to Table 4 for the recommended wire size.
With DC input wiring connected and operating within the DC range. Use the power switch to the front panel, the
green LED at RUN, indicating a successful start-up, and the OFF alarm LED indicates no faults. Using a digital
multimeter, measure the DC output to verify voltage output.
2.2.2 Output Wiring
The DCC comes with Bulk DC output connections at the rear of the Converter. Connect DC cables to the equipment
per the Figure-3. Select the recommended DC wire size using Table 4.
Figure 3 –DC Input and DC Output Connections to the DCC
3.0 Operation
3.1 Start-Up Sequence
After all DC input and output connections have been made, apply DC power, and turn on the converter Power
Switch. The unit will automatically power up and the Converter RUN LED should turn solid green, indicating
successful start-up and ALARM OFF LED indicating no faults. The Converter will output 26.7 VDC if set to float or
28.0 VDC for Equalize.
3.2 Front Panel (Switch, LED and Alarm) Details
Figure 4 –Front Panel Detail

4
Table 1 –Front panel detail
3.3 Rear Panel details
Figure 5 –Rear Panel Detail
Table 2 –Rear Panel Details
Name
Description
LCD Window
-Display the voltage and current
Backlight
-Switch ON/OFF for the LCD Display window light
RUN
-ON LED in green color, indicates Converter ON condition.
-OFF LED indicates the Converter OFF condition.
ALM
-ON LED in Red Color, indicates converter fault or under
protection.
OFF LED, indicates Converter works in normal condition.
EC ADJ/FC ADJ
-Equal voltage / Float voltage adjustable knob
FC /EC
MANU /AUTO
Dial code for Float /Equal Charge and Manual/automatic
A==Switch Float charge and Equal charge. Turn to the right
is Equal charge, Turn to the left is float charge
B== Switch Manual and automatic. Turn to the right is
automatic, Turn to the left is Manual
Note: Automatic float equal charge must be compatible with
the power monitoring system
Power
Switch ON/OFF of the dc converter
Name
Description
DC Voltage input terminal
-Connect Red wire to (+) terminal and Black wire to (-) terminal of the
DC input source to the DC input terminal.
PE SH(+) SH(-)
Current sharing
-Parallel connect port
-Use several units of the same specification of converter connect to get
more current output
-For connection refer to Figure 6.
DC Voltage Output terminal
-Connect Red wire to (+) terminal and Black wire to (-) terminal of the
DC load to the DC output terminal.
GND
-Connect ground cable to the GND terminal.

5
3.4 Parallel Operation
To get more current output it is possible to parallel DCC. Follow the parallel connection according to Figure 6.
Figure 6 –Parallel Connection
4.0 Troubleshoot
Symptom
Possible Cause
Remedy
Output failure with the
following LED status:
RUN LED with Green color and
ALM LED with RED color
Load short-circuit or overload
- Power off, then eliminate short-
circuit or reduce load，Restart again
Output failure with the
following LED status:
RUN LED with Green color and
ALM LED with OFF
Higher or lower DC Input voltage
- Adjust DC Input voltage to normal
Range
*Other problems please contact the service department of La Marche Mfg.
Table 3 –Troubleshooting detail

6
Appendix A: Technical Specifications
ELECTRICAL
Load regulation
≤0.2%
Peak—peak noise
≤150mV
Discrete noise
≤20mV
Efficiency
≧83%
Dynamic response
20% ~ 100% step load≤200Restoring time≤100uS
Working temperature
－5～45℃
Cooling mode
Forced Cool
MTBF
100,000Hour
Weight
17.6 lbs
Dimension
19 x 9.5 x 3.5”
Alarm and Indicators
RUN LED (Indicates Operation of a converter)
ALM LED (Indicates Fault in a converter)
PROTECTION
- Output over/under voltage
- Over-current
- Short-circuit
- Over-temperature protection
ENVIRONMENT
Technical
Specification
Unit
Operating Temperature
-10~50
℃
-10℃Module to work properly,
-20 ° C module rated power start。
Storage Temperature
-40~85
℃
Relative temperature
5—95
%
No condensation
Cooling mode
Forced air
cooling
Intelligent fan, The fan will start if > 55℃(± 5℃)
the fan will stop running if < 55℃(± 5℃)
Altitude
≤4000
m
In 3000—4000 m Environmental conditions of
high-temperature derating, be reduced by 1 ° C
since the 3000 m per 300 m.

7
Appendix B: Power Cabling Guide
Use the following formulas and tables to determine proper wire size for minimal voltage drop. At distances
exceeding 10 feet, the DC wire size should be chosen to keep the voltage difference between the inverter’s DC
input terminals and the battery at less than 1/2 volt when the inverter is fully loaded.
Table of Conventions:
CMA = Cross-section of wire in circular MIL area
A= Ultimate drain in amperes
LF = Conductor loop feet
MaxAmp= Maximum allowable amperes for given voltage
drop
AVD = Allowable voltage drop
K = 11.1 for commercial (TW) copper wire
= 17.4 for aluminum
Calculating Wire Size Requirements:
AVD KLFA
CMA  =
Table 4 –Wire Size/Area Table
Calculating Current Carrying Capacity of Wire:
KLF AVDCMA
MaxAmp 

=
Size
(AWG)
Area
CIR.MILS
Size
(MCM)
Area
CIR.MILS
18
1620
250
250000
16
2580
300
300000
14
4110
350
350000
12
6530
400
400000
10
10380
500
500000
8
16510
600
600000
6
26240
700
700000
4
41740
750
750000
3
52620
800
800000
2
66360
900
900000
1
83690
1000
1000000
0
105600
1250
1250000
00
133100
1500
1500000
000
167800
1750
1750000
0000
211600
2000
2000000

8
Appendix C: Manufacturer’s Warranty
All La Marche Manufacturing Co. equipment has been thoroughly tested and found to be in proper operating
condition upon shipment from the factory and is warranted to be free from any defect in workmanship and
material that may develop within one (1) years from the date of purchase under normal use.
If the equipment proves defective within one year, it shall be replaced without charge after examination at our
factory, providing such defect in our opinion, is due to faulty material or workmanship and not caused by
tampering, abuse, misapplication, or improper installation.
Should the equipment require major replacement or repair, the equipment must be returned to the La Marche
factory to have the inspections, parts, replacements, and testing performed by factory personnel. Should it be
necessary to return a piece of equipment to the factory, the customer or Sales representative must first obtain
an RMA (Return Material Authorization) from the factory. If upon inspection at the factory, the defect was due to
faulty material or workmanship, all repairs will be made at no cost to the customer during the warranty period.
All internal maintenance to be performed by La Marche.
La Marche reserves the right to honor the warranty with a replacement unit.
In accepting delivery of the equipment, the purchaser assumes full responsibility for proper installation, installation
adjustments, and service arrangements. Should minor adjustments be required, the local La Marche Sales
Representative should be contacted to provide this service.
All sales are final. Only standard La Marche units will be considered for return. A 25% restocking fee is charged
when return is a factory authorized. Special units are not returnable.
In no event shall La Marche Manufacturing Co. have any liability for consequential damages, or loss, damage, or
expense directly or indirectly arising from the use of the products, or any inability to use them either separately
or in combination with other equipment or materials, or from any other cause. Also, any alterations of equipment
made by anyone other than La Marche Manufacturing Co. render this warranty null and void.
La Marche Manufacturing Co. reserves the right to make revisions in the current production of equipment and
assumes no obligation to incorporate these revisions in earlier models.
The failure of La Marche Manufacturing Co. to object to provisions contained in customers' purchase orders or
other communications shall not be deemed a waiver of the terms or conditions hereof, nor acceptance of such
provisions.
The above warranty is exclusive, supersedes, and is instead of all other warranties, expressed or implied, including
any implied warranty of merchantability or fitness. No person, agent, or dealer is authorized to give any warranties
on behalf of the Manufacturer, nor to assume for the Manufacturer any other liability in connection with any of
its products unless made in writing and signed by an official of the manufacturer.

9
Appendix D: Document Control and Revision History
Part Number: 143459
Instruction Number: P25-LDCC-1
Issue ECN: