Lamarche AUPS-2K-A1-ABD1-24V150A User manual

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La Marche Manufacturing Company | www.lamarchemfg.com
AUPS
A-Series UPS / Uninterruptible Power
Supply System
Installation and Operation Manual
106 Bradrock Dr. Des Plaines 60018-1967
Tel: [phone] Fax: [phone] CPN 137679
Instruction Drawing Number: P25-LAUPS-1
Revision A00 Rev. Date: 01/18 ECN: 21597

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Important Safety Instructions
Before using this equipment, read all manuals and other documents related to this AUPS system and other
equipment connected to this system. Always have a copy of an inverter’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 power systems. The output from
rectifiers and from 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 input power. Check with a meter
before proceeding. Do not touch any uninsulated parts.
•A licensed electrician should be used in the installation of any unit.
•Always disconnect the unit from the supply, batteries, utility line, and loads before performing maintenance
or cleaning.
•Always assume that an electrical connection is live and check the connection relative to 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 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.
•If modifications to the enclosure are necessary, such as drilling for conduit fitting, ensure the interior is
protected from metal shavings and debris. Additional precautions should be taken to remove any remaining
debris from interior of inverter prior to energizing.
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 risk of arc, connect and disconnect the battery only when the unit’s breakers are off.
•If it is necessary to remove 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 fresh water 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.

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Unit Location
•Allow at least 6 inches of free air on all vented surfaces for proper cooling
•Allow sufficient clearance to open the front panel for servicing.
•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.
Check for Damages
Prior to unpacking the product, note any damage to the shipping container and take pictures. Unpack the
product and inspect the exterior and interior of 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 system 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
Enclosure exterior and interior is not marred or dented
There are no visibly damaged components
All internal components are secure
Printed circuit boards and their connections are firmly seated
All hardware and connections are tight
All wire terminations are secure
All items on 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
accidently tipped over or dropped.

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Table of Contents
Important Safety Instructions ........................................................................................................................ i
Electrical Safety......................................................................................................................................... i
Mechanical Safety...................................................................................................................................... i
Battery Safety ........................................................................................................................................... i
Unit Location.............................................................................................................................................ii
Check for Damages ...................................................................................................................................ii
Returns for Service ....................................................................................................................................ii
Inspection Checklist...................................................................................................................................ii
Handling ...................................................................................................................................................ii
Table of Contents ........................................................................................................................................iii
Table of Figures........................................................................................................................................... v
Model Scope/General Description.................................................................................................................. 1
Understanding the Model Number................................................................................................................. 1
Optional Accessories Included in the System ................................................................................................. 1
1Equipment Handling .............................................................................................................................. 2
1.1 Storing the AUPS........................................................................................................................... 2
1.2 Moving the AUPS .......................................................................................................................... 2
2Installation ........................................................................................................................................... 3
2.1 Mounting the AUPS ....................................................................................................................... 3
2.1.1 Floor-Mounting the AUPS (All Cases) .......................................................................................... 3
2.2 Changing Transformer Taps –Rectifier AC Input............................................................................. 4
2.2.1 Changing Transformer Taps Procedure –Rectifier AC Input ......................................................... 4
2.3 Making the AC Connections ........................................................................................................... 5
2.3.1 Rectifier AC Input Connection Procedure..................................................................................... 6
2.3.2 AC Bypass Connection Procedure ............................................................................................... 6
2.3.3 AC Load Connection Procedure................................................................................................... 6
2.4 Making the DC Input/Battery Connections ...................................................................................... 7
2.4.1 DC Input/Battery Connection Procedure...................................................................................... 7
2.5 Alarm Connections ........................................................................................................................ 8
2.5.1 Alarm Connection Procedure .....................................................................................................10
2.5.2 Understanding the Alarms .........................................................................................................11
2.6 Installing External Temperature Compensation (Option 11W/11Y) ..................................................11
2.7 Enabling/Disabling Ground Detection.............................................................................................12
2.8 Remote Equalize ..........................................................................................................................12
2.9 Remote Voltage Sensing...............................................................................................................12
2.10 DNP 3.0/Modbus SCADA Interface (Option 21P/21Q) .....................................................................12
3Operation ............................................................................................................................................14
3.1 Starting the AUPS ........................................................................................................................14
3.1.1 Checking the Installation...........................................................................................................14

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3.1.2 Starting/Stopping the AUPS.......................................................................................................14
3.2 Factory Settings ...........................................................................................................................18
3.3 Understanding the Alarms ............................................................................................................18
3.4 Digital Control Board –Rectifier Section.........................................................................................18
3.5 Selecting the Charging Mode –Rectifier Section.............................................................................19
3.5.1 Equalize Timer Modes ...............................................................................................................19
3.6Adjusting Parameters –Rectifier Section........................................................................................19
3.6.1 Settings Menu ..........................................................................................................................20
3.6.1.1 Float/Eq Voltage .................................................................................................................20
3.6.1.2 Alarm Settings....................................................................................................................20
3.6.1.3 Advanced Settings ..............................................................................................................20
3.6.1.4 Return to Defaults ..............................................................................................................20
3.6.2 Test Menu................................................................................................................................23
3.6.2.1 Test LEDs ..........................................................................................................................23
3.6.2.2 Test Relays .........................................................................................................................23
3.6.3 AUPS Rectifier Customer Configuration Menu..............................................................................24
3.7 Digital Display –Inverter Section...................................................................................................27
3.8 Adjusting Parameters –Inverter Section ........................................................................................28
3.8.1 Customer Calibration Mode .......................................................................................................28
4Service.................................................................................................................................................30
4.1 Performing Routine Maintenance...................................................................................................30
4.2 Troubleshooting Procedure –Rectifier Section ...............................................................................31
4.3 Troubleshooting Chart –Rectifier Section ......................................................................................32
4.3.1 Ground and Short Circuit Test ...................................................................................................33
4.3.2 Troubleshooting the TRIAC .......................................................................................................33
4.3.3 Troubleshooting and Replacing Power Silicon Diodes/Modules.....................................................34
4.3.4 Checking Capacitors .................................................................................................................34
4.4 Troubleshooting Procedure –Inverter Section................................................................................35
4.5 Troubleshooting Chart –Inverter Section.......................................................................................36
4.5.1 Checking the SCR Module .........................................................................................................37
Appendix A: AUPS Specifications..................................................................................................................38
Appendix B: AUPS Model Number Chart .......................................................................................................39
Appendix C: Field Installable Accessory Kits..................................................................................................40
Appendix D: Manufacturer’s Warranty ..........................................................................................................41
Appendix E: Manufacturer’s Extended Parts Warranty ...................................................................................42
Appendix F: Document Control and Revision History .....................................................................................43

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Table of Figures
Figure 1 - AUPS Case Footprint..................................................................................................................... 3
Figure 2 - Input Terminals Connection (Schematic –240VAC input shown) ..................................................... 4
Figure 3 - AC Connections (AC Load, AC Bypass & Rectifier AC)...................................................................... 6
Figure 4 - DC Input/Battery Connection......................................................................................................... 7
Figure 5 - User Connections to Rectifier Alarm Contacts on S2A-198 Board ..................................................... 8
Figure 6 - User Connections to Inverter Alarm Contacts on S2A-198 Board...................................................... 8
Figure 7 - S2A-341S Display/Control Board.................................................................................................... 8
Figure 8 - S2A-240 Display Board ................................................................................................................. 9
Figure 9 - Example Connections (Customer Provided Equipment)...................................................................10
Figure 10 - Temperature Compensation Connection (External and Internal) ...................................................11
Figure 11 - Digital Rectifier Control Board S2A-341S (Back View) ...................................................................12
Figure 12 - DNP 3.0/Modbus Communication Board ......................................................................................13
Figure 13 - Rectifier Front Panel ..................................................................................................................18
Figure 14 - Inverter Front Panel...................................................................................................................27
Table 1 - Case Type and Weight ................................................................................................................... 2
Table 2 - Available Mounting Methods ........................................................................................................... 3
Table 3 - Input Terminal Connections ........................................................................................................... 4
Table 4 - AC/DC & Ground Wire Size Minimum Requirements ......................................................................... 5
Table 5 - Wire Size/Area Table ..................................................................................................................... 7
Table 6 - Alarms Relay Logic ........................................................................................................................ 9
Table 7 - Alarm Contact Specifications .......................................................................................................... 9
Table 8 - Rectifier Suggested Values per Battery Type ..................................................................................15
Table 9 - Inverter Factory Default Values .....................................................................................................16

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Model Scope/General Description
The La Marche A-Series UPS System (AUPS) is an Uninterruptible Power Supply system designed to power
critical AC loads. Modular in concept, it utilizes separate rectifier and inverter components allowing for simplicity
in sizing and growth for various requirements. The inverter section is compact and supplies a sine wave output.
It provides reliability through transistor switching and a ferroresonant transformer which has inherent voltage
regulation, output filtering, and overload protection. The rectifier section uses controlled ferroresonant
technology, with separate adjustable voltage settings for float and equalize. It provides high efficiency, high
power factor, short circuit protection, and an integral alarm package.
Understanding the Model Number
The AUPS model number is coded to describe the options that are included. Find the model number on the
nomenclature nameplate of the system. Then, follow the chart to determine the configuration of your system.
Optional Accessories Included in the System
This unit may have been outfitted with a number of 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 unit is no longer available, contact La Marche and provide the model or serial number of the unit to
receive a list of the included accessories.

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Table 1 –Case Type and Weight
1 Equipment Handling
1.1 Storing the AUPS
If the AUPS 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 0 to 95%. Storage should not exceed 2 years due to the
limited shelf life of the DC filter capacitors when they are not in service.
1.2 Moving the AUPS
After careful inspection and upon verification that the AUPS is undamaged, identify the enclosure style and
weight of the AUPS unit. Refer to Table 1 below.
Input
Voltage
kVA Rating
2 kVA
3 kVA
5 kVA
7.5 kVA
10 kVA
15 kVA
24 VDC
28 Case
28 Case
450 lbs
600 lbs
(204 kg)
(272 kg)
48 VDC
28 Case
30 Case
31 Case
625 lbs
900 lbs
1600 lbs
(283 kg)
(408 kg)
(726 kg)
125 VDC
28 Case
30 Case
30 Case
31 Case
31 Case
650 lbs
950 lbs
1300 lbs
1650 lbs
1900 lbs
(294 kg)
(431 kg)
(590 kg)
(748 kg)
(862 kg)

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2 Installation
2.1 Mounting the AUPS
When mounting the AUPS in ANY configuration, consider the size and weight of the unit. The floor must be able
to support the weight of the unit, as well as an additional safety factor. Verify the method of mounting and the
weight of the AUPS using Tables 1 and 2. The location chosen for the system should be within an ambient
temperature range of 32 to 122˚F (0 to 50˚C) with a non-condensing relative humidity no higher than 95%.
The AUPS should be mounted in an area free of explosive materials and away from drips and splatter. The
AUPS utilizes convection cooling, so a clearance of at least 6 in (152 mm) of free air must be maintained on the
top and bottom for cooling air. Maintain 36 in (914 mm) or more of clearance at the front of the system in order
to allow for operation and maintenance. The bolts or screws used to secure the AUPS should be sufficient
length to assure a vibration-free mounting. The preferred fastener is a machine bolt backed with a flat washer,
lock washer, and nut. All hardware should be corrosion-resistant.
Case
Number
Cable Entry (gland plates provided)
Mounting
DC Input /
Battery
AC Input /
AC Output
28
Bottom / Top
Bottom / Top
Floor
30
Bottom / Top
Bottom / Top
Floor
31
Bottom / Top
Bottom / Top
Floor
2.1.1 Floor-Mounting the AUPS (All Cases)
Floor-mounting is standard for all cases.
Floor-Mounting Procedure
To floor-mount the AUPS, install four bolts into the floor. Place the AUPS on the bolts, add appropriate
mounting hardware, and tighten securely. The figure below shows the footprint and the bolt size of each AUPS
case style. (All dimensions are in inches)
Case Size
A
B
Bolt Size
28
26”
19.5”
1/2"
30
46”
19.5”
1/2"
31
58”
19.5”
1/2"
Figure 1 –AUPS Case Footprint
Table 2 –Available Mounting Methods

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2.2 Changing Transformer Taps –Rectifier AC Input
NOTE: This procedure refers only to AUPS systems that accept three input voltages of 120, 240, and 208 VAC
at the Rectifier AC Input [Voltage code: ABD].
Before wiring AC power to the AUPS, check the wiring of the power transformer PT, to be sure it is connected
for the correct AC input voltage. The AUPS accepts standard input voltages of 120, 208, or 240 VAC by
changing the connections to the input terminals. No other changes are required.
NOTE: The AUPS is wired at the factory for 240 VAC, except on special request.
2.2.1 Changing Transformer Taps Procedure –Rectifier AC Input
Before changing the PT taps, be sure that all AC supplies and DC battery to the AUPS are turned off and locked
out. Verify that no voltage is present by using a voltmeter at all input and output terminals. Turning off the AC
and DC circuit breakers on the AUPS does NOT eliminate live voltages inside the enclosure. Additionally, de-
energize any external wiring to the alarm relay contacts.
Verify that all voltages within the enclosure are de-energized and locked out. Change the connections to the
input terminals as shown in the table and figure below.
For 120 VAC Input Voltage:
1. Connect jumper across TS-3 terminals #1 & #2
2. Connect jumper across TS-4 terminals D& #3
3. Connect jumper across TS-4 terminals E& #1
Note that AC input 1 connects to terminal L1
Note that AC input 2 connects to terminal L3
For 208 VAC Input Voltage:
1. Connect jumper across TS-3 terminals #2 & #3
2. Connect jumper across TS-4 terminals D& #2
3. Connect jumper across TS-4 terminals E& #3
Note that AC input 1 connects to terminal L1
Note that AC input 2 connects to terminal L2
For 240 VAC Input Voltage:
1. Connect jumper across TS-3 terminals #2 & #3
2. Connect jumper across TS-4 terminals D& #1
3. Connect jumper across TS-4 terminals E& #3
Note that AC input 1 connects to terminal L1
Note that AC input 2 connects to terminal L2
VAC
Input
TB1
Use
TS-3
Jumper
Connection
TS-4
D
E
120
L1-L3
1-2
3
1
208
L1-L2
2-3
2
3
240
1
3
Table 3 –Input Terminal Connections
Figure 2 –Input Terminals Connection
Schematic (240VAC Input Shown)

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2.3 Making the AC Connections
Before making any connections to the AUPS, ensure that the AC power is off at the main breaker box and the
AC Bypass line. Check that the source voltage and frequency matches the voltage and frequency listed on the
AUPS nameplate. For systems with transformer taps, verify that the tap has been set to the correct AC input.
(See Section 2.2.1 for instructions on changing the transformer tap). Select wire size, using the table below,
based on the input protection - breaker/fuse size.
NOTE: Feeder breaker should be sized to match the size of the AC protection used in unit. For systems with
120/240/208V Rectifier AC input:
• 120 VAC input arrangement has breaker poles wired in parallel
o Example: ACB = 40 amp. Input protection = 80 amps.
• 240/208 VAC input arrangement has breaker poles wired in series
o Example: ACB = 40 amp. Input protection = 40 amps.
Breaker
Size/ Fuse
Size - Amps
AWG Minimum Wire
Size Requirement for
Customer Connection
AWG Minimum Wire
Size for Equipment
Grounding
3
#14
#14
5
#14
#14
10
#14
#14
15
#14
#14
20
#12
#12
25
#10
#12
30
#10
#10
40
#8
#10
50
#8
#10
60
#6
#10
70
#6
#8
80
#4
#8
90
#4
#8
100
#4
#8
125
#2
#6
150
#1
#6
175
#1/0
#6
200
#2/0
#6
250
#4/0
#4
300
250 MCM
#4
400
400 MCM
#2
500
600 MCM
#2
Table 4 –AC/DC & Ground Wire Size Minimum Requirements
(All wires specified in the table are rated at 90 °C or 194 °F)
NOTE: These are recommended sizes per La Marche Standards. The National Electrical Code (NEC) and Local
Wiring Codes must be followed.

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2.3.1 Rectifier AC Input Connection Procedure
First, connect an adequate earth ground lead (use Table 4 for sizing) to the terminal marked with a “GROUND”
symbol inside the system. Run the Rectifier AC input wiring to terminals marked L1 and L2 or L3 of the
terminal block TB1 inside the system (for systems with transformer taps, use Table 3 for input connections).
NOTE: Rectifier AC input voltage, phase, and frequency must match with AUPS input ratings.
2.3.2 AC Bypass Connection Procedure
First, select wire size using the Table 4. Connect an adequate earth ground lead (use table on previous page for
sizing) to the terminal marked ground. Then, connect the AC bypass line phase (hot) to the AC BYPASS (Ø)
terminal and the AC bypass line neutral to the AC BYPASS (N) terminal.
NOTE: AC bypass input voltage and frequency must match with the AUPS output ratings.
2.3.3 AC Load Connection Procedure
First, select wire size using the Table 4. Connect an adequate earth ground lead (use table on previous page for
sizing) to the terminal marked ground. Then, connect the AC load phase (hot) to the AC LOAD (Ø) terminal and
the AC load neutral to the AC LOAD (N) terminal.
NOTE: Ground connections are available on terminal blocks TB2 and TB3. Terminal block TB1 does not include
ground connection. There is a main ground stud located on the bottom of the enclosure if these connections are
not adequate.
Figure 3 –AC Connections (AC Load, AC Bypass, & Rectifier AC)

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2.4 Making the DC Input/Battery Connections
Before making any of DC input connections, make sure you have read and fully understand the DC Connection
Procedure below. Ensure that the Battery breaker is set to the OFF position. Select proper size for the DC wiring
from Table 4. If the distance between the systems DC input and the battery exceeds 10 feet, use the Power
Cable Guide below to minimize the voltage drop across the wire distance.
Power Cabling Guide
Use the following formulas and table to determine proper wire size for minimal voltage drop.
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 (KS5482-01)
= 17.4 for aluminum (KS20189)
Calculating Wire Size Requirements
AVD KLFA
CMA  
Calculating Current Carrying Capacity of Wire
KLF AVDCMA
MaxAmp 


2.4.1 DC Input/Battery Connection Procedure
Run the battery wiring to terminals marked positive (+) and negative ( –) on the terminal block TB4 inside the
system.
CAUTION: The AUPS has a Reverse Polarity LED indicator and will illuminate if the batteries are
connected in reverse polarity. Do not close/turn on ANY of the DC breakers or damage to the AUPS
will occur.
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
Table 5 - Wire Size/Area Table
Figure 4 –DC Input/Battery Connection

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Figure 6 –User Connections to
Inverter Alarm Contacts on S2A-198 Board
Figure 5 –User Connections to
Rectifier Alarm Contacts on S2A-198 Board
Figure 7 –S2A-341S Display/Control Board
2.5 Alarm Connections
Eight alarm relays (and 10 alarm LEDs) are included on the rectifier section as a standard feature of the AUPS.
The included alarms are Low DC Current, Low DC Voltage, High DC Voltage, High Voltage Shutdown, AC
Failure, Negative Ground Detection, Positive Ground Detection, and Summary.
Five status indicator relays (and 11 status LEDs) are included on the inverter section as a standard feature of
the AUPS. The included status indicators are Phase Locked, Utility Available, Inverter Available, Load on
Preferred Source, and Load on Alternate Source.
Each alarm/status indicator relay includes two sets of form “C”contacts, enabling the user to connect multiple
remote annunciators. Refer to Figure 5 and 6 for contact connections.
Alarm LEDs are provided on the rectifier section for the following alarms: AC Fail, Low DC Voltage, End of
Discharge, High DC Voltage, High Voltage Shutdown, Low DC Current, Overload/Current Limit, Positive Ground,
Negative Ground, and Summary. Refer to Figure 7 below.
If an alarm condition occurs for a default time of longer than 5 seconds, the Summary alarm relay will activate if
the corresponding alarm is included in the Summary alarm. The HVSD alarm is default set to trigger after 20
seconds. When an alarm activates, the specific indicator on the front panel will light, any connected remote
annunciators will activate, and the display will cycle through all active alarms.

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LEDs are provided on the inverter section for the following status indicators: Phase Lock, Auto Retransfer,
Manual Retransfer, Load on Preferred Source, Load on Alternate Source, Utility Available, Inverter Available,
Load Voltage, Load Current, Load VA, Utility Voltage, Utility Frequency, Inverter Voltage, and Inverter
Frequency. Refer to Figure 8 below.
All alarm contacts for the S2A-198 relay board are designed to be fail-safe. In other words, if both the AC and
DC power are removed, each alarm will be indicating in its correct state. To accomplish this, certain alarm
relays are de-energized on failure (such as Low DC Current), and certain alarm relays are energized on failure
(such as High DC Voltage). Refer to Table 6 for the logic of each alarm and refer to Table 7 for alarm contact
specifications.
Figure 8 –S2A-240 Display Board
S2A-198 Relay Information
Relay Function
Logic
AC Power Fail
De-Energize On Fail
Summary
De-Energize On Fail
High DC Voltage
Shutdown
Energize On Fail
Low DC Current
De-Energize On Fail
High DC Voltage
Energize On Fail
Low DC Voltage
De-Energize On Fail
End of Discharge
De-Energize On Fail
Positive Ground
Energize On Fail
Negative Ground
Energize On Fail
Phase Locked
De-Energize On Fail
Utility Available
De-Energize On Fail
Inverter Available
De-Energize On Fail
Load on Preferred
Source
De-Energize On Fail
Load on Alternate
Source
De-Energize On Fail
Table 6 –Alarms Relay Logic
Load
Resistive Load (P.F. = 1)
Contact Material
Ag (Au clad)
Maximum Allowed Current
2 A
Max. Operating Voltage and
Current
0.5 A at 125 VAC
0.6 A at 110 VDC
2.0 A at 30 VDC
Max. Switching Capacity
62.5 VA
60 W
Min. Permissible Load
10 µA / 10 mVDC
Table 7 –Alarm Contact Specifications

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2.5.1 Alarm Connection Procedure
Before making any connections to the AUPS, ensure that the AC power is off at the main breaker box and that
all of the system’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output
terminals.
For High DCV, High DCV Shutdown, Positive Ground, and Negative Ground:
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the
Normally Closed and Common contacts of the desired alarm (located on the relay alarm contacts on S2A-
198 board). If it is desired that the annunciator be activated after the alarm triggers, connect the annunciator
leads to the Normally Open and Common contacts of the desired alarm.
For Low DCV, AC Power Failure, Low DCA, Summary, Phase Locked, Utility Available, Inverter Available, Load
on Preferred Source, and Load on Alternate Source:
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the
Normally Open and Common contacts of the desired alarm (located on the relay alarm contacts on S2A-198
board). If it is desired that the annunciator be activated after the alarm triggers, connect the annunciator leads
to the Normally Closed and Common contacts of the desired alarm.
EXAMPLE: A customer wants a green lamp to be illuminated
at all times and wants a red lamp to illuminate and a speaker
to sound when the Summary alarm triggers. The customer
would make the connections to the NC and C contacts on
one set of the Summary relay contacts between the speaker
and a power supply. On the other set of Summary relay
contacts, the customer would connect the NO and C contacts
between the green lamp and power supply, and would
connect the NC and C contacts between the red lamp and
power supply. Refer to Figure 9.
Figure 9 –Example Connections
(Customer Provided Equipment)

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2.6 Installing External Temperature Compensation (Option 11W/11Y)
The natural voltage of a battery changes as a function of temperature change. As the battery temperature rises,
the effective voltage of the battery decreases. Without Temperature Compensation, the rectifier will always
produce a set constant output voltage. As the battery temperature increases, this constant voltage will then
induce a higher output current from the rectifier. This higher current can result in overcharging the battery,
which in turn can result in damage to the batteries.
Temperature Compensation combats this overcharging by adjusting the rectifier’s output voltage based on the
temperature read by the temperature probe. In order to increase the accuracy of the temperature
compensation, the external probe can be used to measure the temperature of the battery.
Option 11W includes the compensation circuit and a 24 foot long temperature probe. Option 11Y includes the
compensation circuit and a 100 foot long temperature probe. With either option, approximately two feet of the
probe is taken inside the AUPS enclosure.
External Probe Connection Procedure
Before making any connections to the AUPS ensure that the AC power is off at the main breaker box and that
all of the system’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output
terminals.
1. Locate the terminal strip TS-6 inside the system.
2. As illustrated in figure below, connect wire marked Fto terminal 1and wire marked Gto terminal 2.
3. Connect the black lead of the probe to the other end of terminal 1, and the red lead to the other end of
terminal 2. Refer to Figure 10.
4. Place the external probe in a desired location (it is recommended that the battery manufacturer be
consulted for placement of the probe).
Figure 10 –Temperature Compensation Connection
(External and Internal)

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2.7 Enabling/Disabling Ground Detection
Ground Detection is available on AUPS systems. The purpose of Ground Detection is to determine if the battery
or loads have become grounded. If the battery or loads are set up as floating, it is recommended that Ground
Detection be enabled. When Ground Detection is enabled, a positive or negative ground fault indicator will
energize upon detection of a ground. The Ground Detection circuitry monitors amount of ground current, and
whether it is positive of negative and will alarm when the threshold of 1.5mA is reached (or exceeded).
NOTE: La Marche Mfg. Co. is primarily a manufacturer of battery chargers and not ground detection systems. If
a more precise system is needed, many ground detection systems are compatible with La Marche products.
AUPS systems are shipped from the factory with Ground Detection enabled by default. It is recommended that
Ground Detection be disabled if the battery or loads are either positively or negatively grounded. Additionally,
the AUPS will show a ground fault at all times if the system is known to be grounded and the Ground Detection
is enabled. If an external Ground Detection system is used, the AUPS Ground Detection must be disabled.
Ground Detection Procedure
Before making any changes to the AUPS, ensure that the AC power is off at the main breaker box, the DC
power is off, and that all of the system’s breakers are off. To enable or disable Ground Detection, first locate
the S2A-341S display/control board inside the system. Refer to figure below; all jumpers are located on the
back of the board.
To ENABLE Ground Detection:
•Place jumper JP5
•Move jumper JP76/JP77 to JP76 position
•Move jumper JP78/JP79 to JP78 position
To DISABLE Ground Detection:
•Remove jumper JP5
•Move jumper JP76/JP77 to JP77 position
•Move jumper JP78/JP79 to JP79 position
Figure 11 –S2A-341S Digital Rectifier Control Board (Back View)

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2.8 Remote Equalize
A terminal is provided on the AUPS (RE) for a Remote Equalize function. The rectifier may be remotely forced
into Equalize by connecting the “RE” terminal (on TS-5 terminal) to negative.
CAUTION: Damage to the unit will result if the Remote Equalize Terminals are shorted to any other AC or DC
voltage source or ground on positive grounded chargers.
2.9 Remote Voltage Sensing
Provisions for remote DC voltage sensing are provided. The sensing circuit is activated when wires from the
battery or load are brought back to the RS+ terminal of the rectifier remote sensing circuit. Positive must be
connected to Terminal RS+ (on TS-5 terminal). The positive sense lead should contain an external 1-amp fuse
for negative ground system. The negative sense lead should be fused for positive ground system. When remote
sensing is wired, the rectifier output may have to be readjusted to compensate for the protection diodes on the
circuit board.
CAUTION: The polarity of the sensing terminals is critical. Check and verify the polarity carefully.
2.10 DNP 3.0 / Modbus SCADA Interface (Option 21P/21Q)
The optional DNP 3.0 / Modbus SCADA Interface Communication Board, allows the user to remotely connect to
the AUPS. The board is equipped with four methods of communication; DNP 3.0, Modbus ASCII, Modbus RTU
and Modbus TCP. There are three different ports for connection to the communication board. The three port
types for connection are: RS232, RS485, and TCP (Ethernet). There are two communication boards in the AUPS
system; one for the rectifier alarms and one for the inverter status indicators.
Communication Interface Connection Procedure
Before making any connections to the AUPS, ensure that the AC power is off at the main breaker box and the
rectifier’s breakers are off. Choose which port to use for connection (Ethernet, RS232, and/or RS485 –refer to
Figure 12). Connect the appropriate cable between the port on the communication board and the port on the
computer.
For more details on connection instructions as well as operation instructions, refer to the DNP 3.0 & Modbus
SCADA Interface instruction manual included with the AUPS. The DNP 3.0 & Modbus instruction manual is also
available online at http://www.lamarchemfg.com/.
Figure 12 –DNP 3.0 / Modbus Communication Board

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3 Operation
3.1 Starting the AUPS
All equipment is shipped from the factory fully checked and adjusted based on the customer order. Do not make
any adjustments unless the equipment has been powered-up and the settings have been determined to be
incorrect.
3.1.1 Checking the Installation
Before attempting to start up the AUPS, check and verify that all connections are correct. Check that all
terminations and contacts are tightened securely. Check that the transformer is set for the correct input voltage
and that the input frequency matches the nameplate of the system. Check that the battery voltage matches the
DC input voltage on the nameplate of the system.
WARNING: The AUPS is default set based on 12, 24, or 60 lead acid cells for 24VDC, 48VDC, or
125VDC respectively. The alarm and voltage settings must coincide with the battery type and cells
used for the AUPS system. Refer to Table 8 for suggested values and Sections 3.6.1.1 and 3.6.1.2 for
output and alarm threshold adjustments.
3.1.2 Starting/Stopping the AUPS
Once proper connections are established, the AUPS may be energized. For proper starting and stopping of the
AUPS, follow the procedures below:
Starting the AUPS Procedure
1. Turn all of the system’s breakers and the inverter ON/OFF switch to the OFF position. Set the bypass switch
to AUTO mode.
2. Assure the red Reverse Polarity LED is not lit.
3. Apply AC power to the Rectifier section and turn the Rectifier AC breaker to the ON position. At this point,
the rectifier will slowly ramp up and go through startup sequence. DC voltage and current should be
displayed on the front panel of the rectifier section. Full ramp up sequence must be completed before
moving forward.
4. Turn the Battery breaker to the ON position.
5. Push and hold the Pre-Charge button until the green READY LED illuminates. The green READY LED will
remain illuminated.*
NOTE: Charging capacitors may take up to a minute. (Depending on the DC voltage bus and the total input
capacitance of the system)
6. Release the Pre-Charge button and immediately turn the Inverter DC breaker to the ON position.
7. Turn the ON/OFF switch (inverter section) to the ON position. The inverter should ramp up, but the inverter
display will not energize.
8. Turn the Inverter AC breaker to the ON position. All LEDs and the display should go through a startup
sequence on the front panel of the inverter section. After the startup sequence, Load AC voltage should be
displayed.
9. Apply AC power to the Alternate AC source (Bypass) and turn the Bypass AC breaker to the ON position.
Within a few seconds, the PHASE LOCK LED should illuminate. At this point, two AC sources should be
operating in sync.
CAUTION: The start-up instructions must be followed in the correct order before restarting the AUPS or
damage to the system may occur.
*NOTE: If the green READY LED does not light, check the battery voltage against the system nameplate. If the
red REVERSE POLARITY LED illuminates, the battery has not been installed as indicated. Disconnect the battery
wires immediately or damage to the AUPS may occur.