Lamarche A36D Series User manual

La Marche Manufacturing Company
www.lamarchemfg.com
A36D Series
Controlled Ferroresonant Rectifier /
Power Supply
Installation and Operation Manual
106 Bradrock r. es Plaines 60018
-
1967
Tel: [phone] Fax: [phone] CPN 129389
Instruction rawing Number: P25
-
LA36 SERIES
-
2
Revision A07 Rev. ate: 12/19 ECN: 22429

i
Important Safety Instructions
Before using this equipment, read all manuals and other documents related to this charger and other equipment
connected to this charger. Always have a copy of a charger’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 chargers
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 charger may still
be energized even when the charger has been disconnected from the AC input power. Check with a
meter before proceeding. o not touch any uninsulated parts.
•A licensed electrician should be used in the installation of any charger.
•Always disconnect the charger from the supply, batteries, and loads before performing maintenance,
replacing parts, 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.
•o not operate this charger outside the input and output ratings listed on the charger nameplate.
•o not use this charger for any purpose not described in the operation manual.
Mechanical Safety
•This charger or parts of the charger may get very hot during normal operation, use care when working
nearby.
•o not expose equipment to rain or snow. Always install in a clean, dry location.
•o not operate equipment if it has received a sharp blow, been dropped, or otherwise damaged in any way.
•o not disassemble this charger. 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. O 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 charger is 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 enclosure 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.
•o not drop or place any materials on a battery. A spark or short-circuit could cause an explosion.

ii
Charger 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.
•o not operate this charger in a closed-in area or restrict ventilation in any way.
•o not place charger below battery.
•Never allow battery electrolyte to drip on this charger when reading the specific gravity or filling the battery.
•Never place this charger 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
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 charger 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 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.

iii
Table of Contents
Important Safety Instructions .........................................................................................................................
Table of Contents ........................................................................................................................................ iii
Table of Figures ........................................................................................................................................... iv
Model Scope/General escription .................................................................................................................. 1
Understanding the Model Number ................................................................................................................. 1
Optional Accessories Included in the Charger ................................................................................................ 1
Quick Start Guide ......................................................................................................................................... 2
1 Equipment Handling .............................................................................................................................. 3
1.1 Storing the A36 .......................................................................................................................... 3
1.2 Moving the A36 .......................................................................................................................... 3
2 Installation ........................................................................................................................................... 5
2.1 Mounting the A36 ....................................................................................................................... 5
2.1.1 Rack-Mounting the A36 ........................................................................................................... 6
2.1.2 Floor-Mounting the A36 ........................................................................................................... 6
2.2 AC Input Connections .................................................................................................................... 8
2.3 C Output Connections ................................................................................................................. 9
2.4 Alarm Connections .......................................................................................................................10
2.4.1 Alarm Connection Procedure .....................................................................................................11
2.4.2 Understanding the Alarms .........................................................................................................11
2.5 External Temperature Compensation (Option 11W/11Y) .................................................................13
2.6 Load Sharing ...............................................................................................................................13
2.7 Remote Equalize ..........................................................................................................................14
2.8 Remote Voltage Sensing ...............................................................................................................14
2.9 NP 3.0 / Modbus SCA A Interface (Option 21P/21Q) ...................................................................15
2.10 Battery Side Alarm Sensing (Option 565) .......................................................................................15
3 Operation ............................................................................................................................................16
3.1 Starting the A36 ........................................................................................................................16
3.1.1 Checking the Installation ...........................................................................................................16
3.1.2 Starting/Stopping the A36 .......................................................................................................17
3.1.3 Start-Up Sequence ...................................................................................................................17
3.2 igital Control Board ....................................................................................................................17
3.3 Selecting the Charging Mode ........................................................................................................18
3.3.1 Equalize Timer Modes ...............................................................................................................18
3.4 Adjusting Parameters ...................................................................................................................18
3.4.1 Settings Menu ..........................................................................................................................19
3.5 Test Menu ...................................................................................................................................23
3.5.1 Test LE s ................................................................................................................................23
3.5.2 Test Relays ..............................................................................................................................23

iv
3.6 Output Voltage Adjustments .........................................................................................................24
3.7 TPS 2 Customer Configuration Menu Structure .............................................................................25
4 Frequently Asked Questions ..................................................................................................................26
5 Service ................................................................................................................................................27
5.1 Performing Routine Maintenance ...................................................................................................27
5.2 Troubleshooting Procedure ...........................................................................................................28
5.3 Troubleshooting Chart ..................................................................................................................29
5.3.1 Ground and Short Circuit Test. ..................................................................................................30
5.3.2 Troubleshooting the TRIAC .......................................................................................................30
5.3.3 Troubleshooting and Replacing Power Silicon iodes/Modules .....................................................31
5.3.4 Checking Capacitors .................................................................................................................31
Appendix A: A36 Specifications ..................................................................................................................32
Appendix B: A36 Current raw and Feeder Breaker Sizes (Single Phase) .....................................................33
Appendix C: A36 Current raw and Feeder Breaker Sizes (Three Phase) ......................................................34
Appendix : A36 Heat Losses (Based on 85% efficiency / 0.9 Power Factor at rated load) ............................35
Appendix E: Manufacturer’s Warranty ..........................................................................................................36
Appendix F: Manufacturer’s Extended Parts Warranty ...................................................................................37
Appendix G: ocument Control and Revision History .....................................................................................38
Table of Figures
Figure 1 - 39 Enclosure Bolt Pattern .............................................................................................................. 5
Figure 2 - 9E Enclosure Bolt Pattern .............................................................................................................. 5
Figure 3 - 4 Enclosure Bolt Pattern ............................................................................................................. 5
Figure 4 - 33E Enclosure Bolt Pattern ............................................................................................................ 5
Figure 5 - 33 Enclosure Bolt Pattern .............................................................................................................. 5
Figure 6 - A36 Enclosure Footprint .............................................................................................................. 6
Figure 7 - Input Terminals Connection Schematic (240VAC Input Shown) ....................................................... 7
Figure 8 - User Connections to Alarm Contacts on S2A-198 Board..................................................................10
Figure 9 - S2A-341S isplay/Control Board ...................................................................................................10
Figure 10 - Example Connections (Customer Provided Equipment) .................................................................11
Figure 11 - Temperature Compensation Connection (External and Internal) ...................................................13
Figure 12 - Load Sharing Connection (Schematic Wiring)...............................................................................14
Figure 13 - NP 3.0 / Modbus Communication Board ....................................................................................15
Figure 14 - A36 Front Panel.......................................................................................................................18
Table 1 - Case Type and Weight (10-50 A C) ................................................................................................ 2
Table 2 - Case Type and Weight (75-400 A C) .............................................................................................. 3
Table 3 - Case Type and Weight (19” Rack Mount Case) ................................................................................ 3
Table 4 - Available Mounting Methods ........................................................................................................... 4
Table 5 - Input Terminal Connections ........................................................................................................... 7
Table 6 - AC/ C & Ground Wire Size Minimum Requirements ......................................................................... 8
Table 7 - Wire Size/Area Table ..................................................................................................................... 9
Table 8 - Alarms Relay Logic ....................................................................................................................... 11
Table 9 - Alarm Contact Specifications .........................................................................................................11
Table 10 - Factory efault Values ................................................................................................................16

1
Model Scope/General Description
The La Marche model A36 is a controlled ferroresonant float charger designed to power a load while charging
the battery. The all solid-state electronic control circuit provides excellent line-load voltage regulation, current
limiting, and a power failure relay with light and Form “C” contacts. The A36 is offered with C output voltages
of 12, 24, 48V C with output currents from 6 to 200 Amps. These chargers may be powered with 120, 208, 220,
240, 380, or 480VAC.
Understanding the Model Number
The A36 model number is coded to describe the options that are included. Find the model number on the
nomenclature nameplate of the charger. Then follow the chart to determine the configuration of your battery
charger.
Optional Accessories Included in the Charger
This charger 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 charger is no longer available, contact La Marche and provide the model or serial number of the charger
to receive a list of the included accessories.

2
La Marche A36D Battery Charger: Getting Started
WARNING Please read the Important Safety Instructions before proceeding. Make sure to check
for any shipping damages before getting started.
1 – Connect Proper AC Voltage
Confirm proper AC voltage against charger nameplate. If charger is multi-tap, refer to AC Input Voltage Tap
Configuration table inside the charger or on charger schematic. Close AC breaker.
2 – Adjust Charger DC Output & Alarms
To access the Settings Menu, press the MENU button, select “Settings Menu”, and press the ENTER button.
Once in the Settings Menu, the user can navigate the menus with the up and down arrows. To enter a submenu,
use the ENTER button. The BACK button returns to the previous menu. When making a selection, the ENTER
button will store the value and step back. The BACK button will not save the change and will go a step back. At
any point, the settings menu can be exited, with or without saving the settings.
Float/Equalize Voltage Advanced Settings
• Float Voltage • Equalize Timer Settings
•
Equalize Voltage
o
Equalize Timer Mode
Alarm Settings
o
Equalize Timer Hours
•
Advanced Alarm Settings
• Alarm Thresholds
o
Alarm elays
o
Low Current
o
Alarm Operation
o
Overload
•
Temperature Compensation
o
Low Voltage
o
Temp Comp Enable
o
End of ischarge
o
Temp Comp Rate
o
High Voltage
•
Ground etection Alarm Enable
o
High Voltage Shutdown
o
Enable or isable
• Summary Alarm Selects • Communication Settings
o
Low Current in
Summary
o
Refer to manual for setup
o
AC Fail in Summary • LC Settings
o
Ground etection in Summary
o
Auto Off 2 Minutes or Always On
3 – Connect Batteries & Loads
Observe proper polarity when making
battery and load connections. Close C
breaker, if applicable.
A36D
Quick Start Guide

3
1 Equipment Handling
1.1 Storing the A36D
If the A36 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 C filter capacitors when they are not in service.
1.2 Moving the A36D
After careful inspection and upon verification that the A36 is undamaged, identify the enclosure style and weight
of the A36 charger. Refer to the tables below.
Output
Voltage Frequency
Ampere Rating
10 ADC 12 ADC 15 ADC 20 ADC 25 ADC 30 ADC 50 ADC
12 VDC
60 Hz
39 Case 39 Case 39 Case 33 Case 33 Case
45 lbs 50 lbs 54 lbs 78 lbs 99 lbs
20.4 kg 22.7 kg 24.5 kg 35.4 kg 44.9 kg
50 Hz
33 Case
109 lbs
49.4 kg
24 VDC
60 Hz
39 Case 39 Case 39 Case 39 Case 33 Case 33 Case 33 Case
50 lbs 54 lbs 58 lbs 64 lbs 99 lbs 115 lbs 130 lbs
22.7 kg 24.5 kg 26.3 kg 29 kg 44.9 kg 52.2 kg 59 kg
50 Hz
33 Case 33 Case 33 Case
109 lbs 127 lbs 143 lbs
49.4 kg 57.6 kg 64.9 kg
48 VDC
60 Hz
39 Case 39 Case 33 Case 33 Case 33 Case 33 Case 33 Case
64 lbs 70 lbs 110 lbs 118 lbs 125 lbs 133 lbs 180 lbs
29 kg 31.8 kg 49.9 kg 53.5 kg 56.7 kg 60.3 kg 81.6 kg
50 Hz
33 Case 33 Case 33 Case 33 Case
130 lbs 138 lbs 147 lbs 198 lbs
59 kg 62.6 kg 66.7 kg 89.8 kg
Table 1 - Case Type and Weight (10-50 A C)

4
Output
Voltage Frequency
Ampere Rating
75 ADC 100 ADC 150 ADC 200 ADC 200 ADC 300 ADC 400 ADC
12 VDC
60 Hz
33E Case 33E Case 9 Case 9 Case
110 lbs 130 lbs 145 lbs 180 lbs
49.9 kg 59 kg 65.8 kg 81.6 kg
50 Hz
33 Case 4 Case 9 Case 9 Case
121 lbs 143 lbs 160 lbs 198 lbs
54.9 kg 64.9 kg 72.6 kg 89.8 kg
24 VDC
60 Hz
33E Case 33E Case 9 Case 9 Case 43 Case 43 Case 43 Case
145 lbs 180 lbs 280 lbs 310 lbs 600 lbs 700 lbs 800 lbs
65.8 kg 81.6 kg 127 kg 140.6 kg 272.2 kg 317.5 kg 362.9 kg
50 Hz
33E Case 33E Case 9 Case 9E Case 43 Case 43 Case 44 Case
160 lbs 198 lbs 309 lbs 342 lbs 661 lbs 771 lbs 881 lbs
72.6 kg 89.8 kg 140.2 kg 155.1 kg 299.8 kg 349.7 kg 399.6 kg
48 VDC
60 Hz
9 Case 9 Case 72 Case 72 Case 43 Case 44 Case 44 Case
260 lbs 286 lbs 528 lbs 572 lbs 755 lbs 900 lbs 1193 lbs
117.9 kg 129.7 kg 239.5 kg 259.5 kg 342.5 kg 408.2 kg 541.1 kg
50 Hz
9 Case 9E Case 72 Case 72 Case 43 Case 44 Case 44 Case
287 lbs 315 lbs 582 lbs 630 lbs 832 lbs 992 lbs 1315 lbs
130.2 kg 142.9 kg 264 kg 285.8 kg 377.4 kg 450 kg 596.5 kg
Table 2 - Case Type and Weight (75-400 A C)
Output
Voltage Frequency
Ampere Rating
15 ADC 20 ADC 25 ADC 30 ADC 50 ADC 75 ADC
12 VDC 60 Hz
4 Case 4 Case 4 Case
78 lbs 99 lbs 110 lbs
35.4 kg 44.9 kg 49.9 kg
24 VDC 60 Hz
4 Case 4 Case 4 Case 4 Case
99 lbs 115 lbs 130 lbs 145 lbs
44.9 kg 52.2 kg 59 kg 65.8 kg
48 VDC 60 Hz
4 Case 4 Case 4 Case 4 Case 4 Case
110 lbs 118 lbs 125 lbs 133 lbs 180 lbs
49.9 kg 53.5 kg 56.7 kg 60.3 kg 81.6 kg
Table 3 - Case Type and Weight (19” Rack Mount Case)

5
2 Installation
2.1 Mounting the A36D
When mounting the A36 in any configuration, consider the size and weight of the charger. The wall, rack, and/or
floor must be able to support the weight of the charger as well as an additional safety factor. Verify the weight
of the A36 charger using Tables 1, 2 and 3, and the method of mounting using Table 4 below. The location
chosen for the charger 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 A36 should be mounted in an area free of explosive
materials and away from drips and splatter. The A36 utilizes convection cooling, so a clearance of at least 6in
(152mm) of free air must be maintained on vented sides. Maintain 36in (914mm) or more of clearance at the
front of the charger in order to allow for operation and maintenance. The bolts or screws used to secure the
charger 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.
Enclosure
Number
Cable Entry Standard
Mounting
Optional
Mounting Kits
AC Input DC Output
4D Left Top / Back Right Top / Back 19/23” Rack Wall* / Floor**
39 Left Top / Back Right Top / Back 19/23” Rack Wall* / Floor**
9E Left Top / Back Right Top / Back 23” Rack Wall* / Floor**
33 Left Top / Back Right Top / Back 23” Rack Wall* / Floor**
33E Left Top / Back Right Top / Back 23” Rack Wall* / Floor**
43 Top Left Top Back Floor
44 Top Left Top Back Floor
72 Right/Bottom/Side Bottom Floor
* Wall mounting brackets required and overall height would change. Case size may differ depending on optional accessories.
** Floor mounting brackets required and overall height would change. Case size may differ depending on optional accessories.
Table 4 - Available Mounting Methods

6
2.1.1 Rack-Mounting the A36D
The A36 can be installed in most relay racks with standard EIA hole spacing. If a relay rack is needed, they are
available for purchase from La Marche. The 4D, 9E, 33, 33E, and 39 enclosures are shipped from the factory
with the necessary brackets installed for rear mounting on a relay rack . The rack mounting bracket for the 4D
and 39 enclosures allow for mounting on a 19” or 23” rack, and the 9E, 33, and 33E enclosures allow for
mounting on a 23” rack.
Rack Mounting Procedure
Before installing the charger on the rack, locate the conduit entrances and assure the knockouts on the top, sides,
or bottom of the charger are accessible after the charger is rack-mounted. To rack mount the A36 , first mount
the charger onto the rack-mounting brackets using the hardware supplied. Second, install the brackets onto the
rack. Provide at minimum 6in (152mm) of air space above and below to allow for cooling.
Figure 2 – 9E Enclosure Bolt Pattern
Figure 1 - 39 Enclosure Bolt Pattern
Figure 4 – 33E Enclosure Bolt Pattern
Figure 3 – 4D Enclosure Bolt Pattern
NOTE All dimensions are in inches. For further A36 enclosure information, see the outline drawings online at
http://www.lamarchemfg.com/info/enclosure-drawings.html
Figure 5 - 33 Enclosure Bolt Pattern

7
2.1.2 Floor-Mounting the A36D
Floor-mounting the 43, 44, and 72 enclosures is standard. To floor-mount the A36 , install four to six anchor
bolts into the floor. Place the charger on the bolts, add appropriate mounting hardware, and tighten securely.
The figure below shows the footprint and the bolt size of each A36 enclosure style. All dimensions are in inches.
Case Size A B Bolt Size
43 11.5” 12” 3/8"
44 22” 17.06 3/8"
72 25.75” 17.5” 1/4"
Figure 6 - A36 Enclosure Footprint

8
2.2 AC Input Connections
Before beginning any work inside the charger, ensure that all incoming AC supply power is off at the main breaker
box and the charger’s breakers are off. Check that the source voltage and frequency match the voltage and
frequency listed on the charger nameplate. For chargers with transformer taps, verify that the tap has been set
to the correct AC input and refer to charger schematic for input tap settings. Select wire size using the table
below. This is based on an overload current of 110-115% of the input current listed on the charger nameplate.
NOTE Feeder breaker should be sized to match the size of the AC protection used in charger.
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 5 – AC/ C & 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.
AC Connection Procedure
First, connect an adequate earth ground lead (use table above for sizing) to the terminal marked ground. Install
the input AC cables to the AC input terminals of the charger.

9
2.3 DC Output Connections
Before making any of C output connections, make sure you have read and fully understand the C Connection
Procedure below. Select proper size for the C wiring from the wire size table on the previous page. If the distance
between the charger’s C output and the C load exceeds 10 feet, use the Power Cable Guide below to minimize
the voltage drop across the wire distance.
NOTE It is recommended to use a battery disconnect breaker between charger and battery bank; helpful during
battery or charger maintenance.
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
AV = 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
K
LF
AVDCMA
MaxAmp ×
×
=
DC Connection Procedure
To prevent the C circuit breaker from tripping when connecting the battery, connections should be done in the
following order.
1. Make sure that the incoming voltage to the charger is turned off.
2. Turn off/open the charger’s AC and C circuit breakers.
3. Connect the battery cables to the charger’s C output terminals. OBSERVE PROPER POLARITY.
4. Energize the charger by supplying AC voltage and turning on/closing the charger’s AC breaker. This will charge
the capacitors inside the charger and eliminate heavy arcing when the battery is connected.
5. After 30 seconds, turn on/close the C breaker.
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 6 – Wire Size/Area Table

10
2.4 Alarm Connections
Seven alarm relays (and 9 alarm LE s) are included as a standard feature of the A36 . The included alarms are
Low C Current, Low C Voltage, High C Voltage, High Voltage Shutdown, AC Failure, Open C Protection, and
Summary alarm. Each alarm includes two sets of form ‘C’ contacts, enabling the user to connect multiple remote
annunciators. Refer to the figure below for alarm contact connections.
Alarm LE s are provided for the following alarms: AC Fail, Low C Voltage, End of ischarge, High C Voltage,
High Voltage Shutdown, Low C Current, Overload/Current Limit, Open C Protection, and Summary. Refer to
the figure 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 HVS 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.
All alarm contacts for the S2A-198 relay board are designed to be fail-safe. In other words, if both the AC and C
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 C Current), and certain alarm relays are energized on failure (such as High
C Voltage). Refer to Table 7 for the logic of each alarm and refer to Table 8 for alarm contact specifications.
Figure 8 – S2A-341S isplay/Control Board
Figure 7 – User Connections to Alarm Contacts on S2A-198 Board

11
2.4.1 Alarm Connection Procedure
Before making any connections to the A36 , ensure that the AC power is off at the main breaker box and the
charger’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output terminals.
For relays mentioned as ENERGIZE on alarm condition:
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the
NC and C contacts of the desired alarm (located on the relay alarm contacts on S2A-198 board). If it is
desired that the annunciator be deactivated until the alarm triggers, connect the annunciator leads to the NO
and C contacts of the desired alarm.
For relays mentioned as E-ENERGIZE on alarm condition:
If it is desired that the annunciator be active until the alarm triggers, connect the annunciator leads to the
NO and C contacts of the desired alarm (located on the relay alarm contacts on S2A-198 board). If it is
desired that the annunciator be deactivated until the alarm triggers, connect the annunciator leads to the NC
and C 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)
S2A-198 Relay Information
Relay Function Logic
AC Power Fail e-Energize on Fail
Summary e-Energize on Fail
High C Voltage
Shutdown Energize on Fail
Low C Current e-Energize on Fail
High C Voltage Energize on Fail
Low C Voltage e-Energize on Fail
Open C Protection e-Energize on Fail
Table 7 – 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 V C
2.0 A at 30 V C
Max. Switching Capacity
62.5 VA
60 W
Min. Permissible Load 10 µA / 10 mV C
Table 8 – Alarm Contact Specifications

12
2.4.2 Understanding the Alarms
HIGH VOLTAGE SHUTDOWN ALARM will trigger and the red “HIGH VOLTAGE SHUT OWN” LE will turn on
if the output C voltage of the charger rises above the alarm threshold for longer than 20 seconds and there is
load on the charger. This is usually due to the failure of an internal charger component, but could also be the
result of maladjustments of the output voltage settings. If the High C Voltage Shut own alarm activates, the
C output of the charger is shut off by tripping the AC breaker to prevent irreversible damage to the battery. To
reset, press the ALARM RESET button on the front panel, then close the AC breaker.
NOTE The HVS alarm will not trigger if there is a Low Current alarm present.
HIGH DC VOLTAGE ALARM will trigger and the red “HIGH C VOLTAGE” LE will turn on if the output C
voltage rises above the specified voltage threshold of the alarm for longer than 5 seconds. This is usually caused
by maladjustments of the output voltage settings, or in rare cases, by a failure of an internal charger component.
LOW DC VOLTAGE ALARM will trigger and the red “LOW C VOLTAGE” LE will turn on if the C voltage falls
below the specified voltage threshold of the alarm for longer than 5 seconds. This is usually due to an AC Failure,
or the charger is overloaded into deep-current limit. It could also be caused by maladjustments of the output
voltage settings, or in rare cases, by a failure of an internal charger component.
OPEN DC PROTECTION ALARM will trigger and the red “OPEN C PROTECTION” LE will turn on if the output
C breaker/fuse has been opened. In the case the C protection is opened, the bottom line of the display will
read “OPEN C PROT”.
AC POWER FAIL ALARM will trigger, the green “AC ON” LE will turn off, and the red “AC FAIL” LE will turn
on when the AC power to the charger is lost. The alarm will automatically reset when AC power is restored to the
charger. When AC power is lost the front panel display and indicators will remain powered by the connected
batteries.
SUMMARY ALARM is triggered and the “SUMMARY” LE will turn on when any of the following alarms are
activated:
 Low C Voltage  Low C Current*
 High C Voltage  AC Power Fail*
* Optional to include in Summary Alarm
LOW DC CURRENT ALARM will trigger and the amber “LOW C CURRENT” LE will turn on if the output C
current of the charger falls below the alarm threshold for longer than 5 seconds. This is usually caused by the
load (if applicable) being disconnected or going into a sleep state as well as the battery (if applicable) reaching a
full charge. This could also be the result of maladjustments of the output voltage settings. In rare cases, this
could be the result of certain load sharing setups in which the other charger is set up to supply more power to
the load. This alarm can be disabled if considered a nuisance alarm.
Most alarms have adjustable time delays to energize; ranging from 0 through 255 seconds. Refer to Table 10 for
the factory setting of each alarm.
NOTE All alarms automatically reset when the alarm condition is corrected, except the High Voltage Shutdown
alarm. Refer to the corresponding alarm description above for reset instructions.

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2.5 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 battery charger 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 charger. This higher current can result in overcharging the battery,
which in turn can result in damage to the batteries.
The TPS 2 temperature compensation rate can easily be adjusted in the menu from the default setting OFF to
1mV/°C/cell, up to 4mV/°C/cell. The temperature compensation considers 25°C as the nominal ambient
temperature and adjusts the voltage level based on the difference between the actual temperature and 25°C.
The battery manufacturer should be consulted for the proper temperature compensation slope, as well as the
Float and Equalize voltage set points.
An internal temperature probe is standard and will compensate for overall ambient temperature changes if the
batteries and charger are in the same room. The accuracy of temperature compensated charging can be greatly
enhanced by using an optional remote temperature probe directly on the battery (Option 11W/11Y). Option 11W
includes a 24-foot long temperature probe and Option 11Y includes a 100-foot long temperature probe. With
either option, approximately two feet of the probe is taken inside the charger enclosure.
External Temperature Probe Connection Procedure
Before making any connections to the A36 , ensure that the AC power is off at the main breaker box and the
charger’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output terminals.
NOTE Procedure only applies on A36 chargers with Option 11W/11Y.
1. Locate the TS-6 terminal strip inside the charger.
2. Connect wire marked F to terminal 1 and wire marked G to terminal 2. Refer to the figure below.
3. Connect the black lead of the external probe to the other end of terminal 1, and the red lead to the other
end of terminal 2.
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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2.6 Load Sharing
All A36 chargers include the Load Sharing feature. Load sharing allows the user to parallel with any identical
A36 to share a C load and therefore reduce the strain on each charger. When connected, identical A36
chargers are forced to share the load within ±5% for individual unit outputs greater than 10% of the rated output.
Chargers to be paralleled MUST be the same output (voltage and current).
Load Sharing Procedure
Before making any connections to the A36 , ensure that the AC power is off at the main breaker box and that all
of the chargers’ breakers are off. Verify that no voltage is present by using a voltmeter at all input and output
terminals.
1. Connect the C output of all chargers in parallel to the same C load/battery.
2. Locate terminal strip TS-5 inside the chargers.
3. Connect the LS terminal of one charger to the LS terminal of the next charger. Refer to the figure above.
4. Once batteries are fully charged and/or loads are stabilized, turn OFF all chargers except for one.
5. Take a voltage reading on the output of the charger.
6. Turn on the next charger, turn off the first charger.
7. Set the output voltage of the next charger to match the first by adjusting the Float voltage using the settings
menu (refer to Section 3.4.1.1) .
8. After all chargers have been adjusted, turn ON all chargers.
9. Follow the same procedure for setting the Equalize voltage.
2.7 Remote Equalize
A terminal is provided on charger (RE) for a Remote Equalize function. The charger may be remotely forced into
Equalize by connecting the “RE” terminal (on TS-5 terminal, as shown on the figure above) to negative C bus.
Caution amage to the unit will result if the Remote Equalize Terminals are shorted to any other AC or C
voltage source or ground on positive grounded chargers. In a system, all charger “RE” terminals are
connected together and when any one master charger is put into Equalize, all chargers will go into
Equalize and display will read “RE”. To return to Float Mode, this master charger must be returned to
the Float Mode.
NOTE Remote equalize can only be used with other A36 battery chargers.
2.8 Remote Voltage Sensing
Provisions for remote C voltage sensing are provided. The sensing circuit is activated when wires from the
battery or load are brought back to Terminals RS + (RSP) and RS- (RSN) of the charger remote sensing circuit.
Positive must be connected to Terminal RS+, negative to Terminal RS- (refer to Figure 12). 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 unit 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.
Figure 12 – Load Sharing Connection
(Schematic Wiring)

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2.9 DNP 3.0 / Modbus SCADA Interface (Option 21P/21Q)
The optional NP 3.0 / Modbus SCA A Interface Communication Board, allows the user to remotely connect to
the A36 battery charger. The board is equipped with four methods of communication; NP 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).
Communication Interface Connection Procedure
Before making any connections to the A36 , ensure that the AC power is off at the main breaker box and the
charger’s breakers are off. Choose which port to use for connection (Ethernet, RS232, and/or RS485 – refer to
Figure 18). 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 NP 3.0 & Modbus SCA A
Interface instruction manual included with the A36 . The NP 3.0 & Modbus instruction manual is also available
online at http://www.lamarchemfg.com/.
2.10 Battery Side Alarm Sensing (Option 565)
The optional battery voltage sensing board (S2A-407S) will allow the user to see the battery voltage, even when
the charger C breaker is open.
The Low Voltage and End of ischarge alarms are based on the voltage measured on the battery side of the C
breaker when the option 565 is used. In case of sensing board failure, a special alarm “S2A-407S Failure” and the
Summary alarm will be triggered. Also, the controller will start using the charger side voltage sensing for Low
Voltage and End of ischarge alarms.
Figure 12 – NP 3.0 / Modbus Communication Board