Argus Switched Mode Battery Charger User manual

Argus Switched Mode
Battery Charger
010-523-B2

Argus Technologies Ltd. Visit www.argus.ca
Burnaby, British Columbia. Telephone: [phone] Fax: [phone]
Argus Technologies reserves the right to make changes to the products and information contained in this document without notice.
Copyright 2008 Argus Technologies Ltd. Argus®is a registered trademark of Argus Technologies Ltd. All Rights Reserved.
Printed in Canada.
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Argus Technologies Ltd. 010-523-B2 Rev C WC
Printed in Canada. © 2005 Argus Technologies Ltd. ARGUS is a registered trademark of Argus Technologies Ltd. All Rights Reserved.
Argus Switched Mode
Battery Charger
010-523-B2
The following documents and drawings are included in this manual to provide the necessary information required for routine
operation and fault diagnosis of the unit.
• Specifications: 010-523-B1 Rev A
• CSA/NRTL Equivalence: 048-554-10
• Warranty Policy: 048-507-10
• Installation and Operation Instructions: 010-519-C0 Rev A
• Outline Drawing: 010-519-06
• Factory Service Information: 048-527-10

SPECIFICATIONS FOR ARGUS TECHNOLOGIES BATTERY CHARGER, 24V/10A
Battery Output:
Voltage: Float: 24-30 VDC
Equalize: Float + 2.0 V
Current: 10 ADC
Power: 250 Watts Continuous
Regulation: < 1.0% line and load (static)
< 10% deviation for 10% to 90% load step (dynamic)
<2 ms to +/-1.0% of output for 10% to 90% load step
Temperature Stability: <200 ppm/degree C over the operating range
Noise: Less than 32 dBrnc (Voice Band)
Less than 50mVrms to 10MHz (Wide Band)
Less than 150mVp-p to 100MHz (Wide Band)
Output Protection: Current Limiting Circuitry, Output Fuses, Over-Voltage Shutdown
Withstands ESD to 15kV, Battery Reversal Protection
System Output:
Voltage: 24V Battery Output
High impedance when not on battery
Noise: Less than 32 dBrnc (Voice Band)
Less than 50mVrms to 10MHz (Wide Band)
Less than 150mVp-p to 100MHz (Wide Band)
Protection: Inline 60A (maximum) fuse between battery and charger
Withstands ESD to 15kV
Battery Transfer Time: < 1 ms
Argus Technologies Ltd. 010-523-B1 Rev. A Page 1 of 3

Input:
Voltage: 85-140 VAC (47-63 Hz)
180-264 VAC (47-63 Hz)
Current: 3.7 Amps (120 VAC nominal) @ 250 Watts output
1.9 Amps (240 VAC nominal) @ 250 Watts output
Power Factor: Greater than 0.75 (True PF) @ 100% load, nominal input voltage
Efficiency: 76% minimum @ 100% load, nominal input voltage
Input protection: Input Fuses
Withstands 300VAC for 1 second with no failure
(input configured for 240VAC)
Withstands ESD to 15kV
Recommended Feeder Breaker: 7 Amps or greater (120VAC)
4 Amps or greater (240VAC)
Mechanical:
Size: 3.5" H x 17.0" W x 10.0" D
(8.9cm H x 43.2cm W x 25.4cm D)
Mounting: 19" or 23", center or flush mount, or stand alone
Minimum 1.75" free air space above unit for cooling
Weight: 14 lbs (6.4 kg)
Acoustic Noise: 45 dBA at three feet (one metre)
Connections:
Input: Standard IEC-320 AC Inlet
Output: 1/4" studs
Alarms: Terminal Block #24-#18 AWG
Temp. Comp.: Terminal Block #24-#18 AWG
Argus Technologies Ltd. 010-523-B1 Rev. A Page 2 of 3

Environmental:
Cooling: Natural Convection
Temperature: -30ºC to +60ºC (-22ºF to +140ºF) (operating)
Humidity: 0-95% Relative Humidity @ +50ºC (non-condensing)
Elevation: -500 to +2000 metres (-1640 to 6560 feet)
*ELEVATION ABOVE 2000m: The maximum operating
temperaure can be linearly derated to 40°C at 6000m.
Derating is due to reduced cooling efficiency.
Standards met:
CSA: 950 (Certified under the NRTL program)
UL: 1950 (As part of the CSA NRTL program)
CENELEC: EN 60950
FCC: Part 15, Sub J Class B (radiated and conducted emissions)
EMC EN 50081-1 to EN 55022 Class A Only
EN 50082-1
“CE ” Mark Per Directive 89-336-EC “EMC”
In Accordance with FCC requirements, we provide the following statement as specified in the FCC guidelines for
conformance to Part 15 Subpart J, Level B:
WARNING: This equipment generates, uses, and can radiate radio frequency energy and if not
installed and used in accordance with the instruction manual, may cause interference to
radio communications. It has been tested and found to comply with the limits for a Class
B computing device pursuant to Subpart J of Part 15 of the FCC Rules, which are
designed to provide reasonable protection against such interference when operated in a
residential environment. However there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures: a) Relocate the unit with respect to the receiver; b:) Move the unit away from
the receiver; c) Plug the unit into a different outlet so that unit and receiver are on
different branch circuits. If necessary, consult dealer or an experienced radio technician
for additional suggestions. :WARNING
Argus Technologies Ltd. 010-523-B1 Rev. A Page 3 of 3

Warranty Policy
Argus Technologies Ltd. warrants all equipment manufactured by it to be free from defects in parts
and labor, excluding third party OEM materials (example: air conditioners, batteries), for a period of
two years from the date of shipment from the factory. For third party products the OEM’s warranty
shall apply. The liability of Argus applies solely to repairing, replacing or issuing credit (at Argus’ sole
discretion) for any equipment manufactured by it and returned by the customer during the warranty
period. The terms of the warranty are Ex Works (EXW) from Argus’ factory service location.
Argus reserves the right to void the warranty if:
(1) identification marks or serial numbers are removed or altered in any way,
(2) invoice is unpaid, or
(3) defect is the result of misuse, neglect, improper installation, environmental
conditions, non-authorized repair, alteration or accident.
Argus shall not be liable to the customer or other parties for any loss of profits, loss of use, costs for
removal or installation of defective equipment, damages or consequential damages based upon
equipment failure during or after the warranty period. There shall be no other obligations either
expressed or implied. Argus will not honor warranties for batteries and other third party products
without prior written Argus authorization.
Freight Policy
Customer is responsible for all shipping and handling charges (COD and freight collect will not be
accepted without prior approval from Argus Technologies).
Terms of Payment (North America)
Payment terms are net 30 days subject to prior credit approval. All other orders require payment
before shipping.
Terms of Payment (International)
Payment terms are subject to prior approval and are typically through Tele-Transfer.
Return Material Policy
Our RMA policy is designed to ensure prompt, efficient and high quality factory service. A Return
Material Authorization (RMA) number must be obtained before products can be accepted for
servicing by the Argus factory. For returns to an authorized service center (refer to “Authorized
Service Centers” for locations), please consult the individual service center for specific return policies
and instructions.
To obtain a RMA number for a factory return, customers must call the appropriate location with the
product serial and model number, as well as a brief description of the problem, shipment instructions
and billing details.
The original packing container should be used whenever possible. Both the shipping documents
and the outside of the box must have the RMA # clearly marked and the product shipped prepaid to
the Argus factory service center. Argus will endeavor to repair products within five working days of
receipt. Repairs to the returned product are warranted for a period of six months. A service charge
may be applied if no fault is found in the returned product. Argus will not accept products without an
RMA number.
Business Hours
Argus North American office hours are 7:30 am to 5:00 pm (Pacific Standard Time) Monday to Friday.
WARRANTY AND REPAIR INFORMATION
Canada and USA toll free 24 hour emergency technical support: +1 888 GO ARGUS (462 7487) Outside North America: [phone]
Factory Service Centers
Canada and International
Argus Technologies Ltd.
ATTN: RMA Returns
7033 Antrim Avenue
Burnaby, BC, V5J 4M5 Canada
Tel: [phone]
Fax: [phone]
Email: [e-mail]
USA
Argus Technologies Inc.
ATTN: RMA Returns
3116 Mercer Avenue
Bellingham, WA, 98225 USA
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Asia-Pacific
PCM Electronics (Dong Guan) Co., Ltd.
Hongli Industrial Area, Miaobian, Liaobu Town,
Dongguan City, Guangdong Province,
523400 China
Tel: [phone]
Fax: [phone]
Authorized Service Center
Argentina
Argus Technologies de Argentina
Belen 315, Capital Federal, Buenos Aires,
1407l Argentina
Tel: [phone]
Fax: [phone]
Cell: [phone]
Email: [email protected]
Asia
Argus Technologies Asia Pte Ltd
Blk 6 Tagore Lane #160
Singapore 787570
Tel: [phone]
Fax: [phone]
Australia
CPS National
8/376 Newbridge Rd
Moorebank, NSW, 2170 Australia
Tel: [phone]
Fax: [phone]
Australia/New Zealand
Alpha Power Systems Pty Ltd
Unit 3, 30 Heathcote Road
Moorebank, NSW, 2170 Australia
Tel: [phone]
Fax: [phone]
Century Yuasa
37 - 65 Colbalt Street
Carole Park QLD 4300
Australian Sales & Service
Tel: [phone]
Fax: [phone]
New Zealand Sales & Service
Tel: [phone]
Fax: [phone]
Canada
Compower Systems Inc.
118 Tiffield Road
Toronto, ON, M1V 5N2 Canada
Tel: [phone]
Fax: [phone]
Europe
Alpha Technologies Europe Ltd.
Cartel Business Estate
Edinburgh Way
Harlow, Essex, CM20 2DU UK
Tel: [phone]
Fax: [phone]
Mexico & Central America
Technologies Argus First De Mexico SA de CV
Anatole France No. 17
Col. Polanco
Mexico City, 11560 Mexico
Tel: [phone]
Fax: [phone]
South America
Argus Technologies Argentina
Santo Tome 2573, Capital Federal
Buenos Aires, 1416 Argentina
Tel: [phone]
Cell: [phone]
E-pager: [email protected]
Turkey
IPC Enerji Elk San ve TIC AS
Inonu cad. Kanarya sok. No:20
Yenisahra - Kadikoy
Istanbul, Turkey
Tel: [phone]
Fax: [phone]
048-507-10-I1 Rev S (09/2007)

What are the CSA and NRTL?
CSA (Canadian Standards Association also known as CSA International) was established in 1919 as
an independent testing laboratory in Canada. CSA received its recognition as an NRTL (Nationally
Recognized Testing Laboratory) in 1992 from OSHA (Occupational Safety and Health Administration) in
the United States of America (Docket No. NRTL-2-92). This was expanded and renewed in 1997, 1999,
and 2001. The specic notications were posted on OSHA’s ofcial website as follows:
Federal Register #: 59:40602 - 40609 [08/09/1994]
Federal Register #: 64:60240 - 60241 [11/04/1999]
Federal Register #: 66:35271 - 35278 [07/03/2001]
When these marks appear with the indicator “C and US” or “NRTL/C” it means that the product is
certied for both the US and Canadian markets, to the applicable US and Canadian standards. (1)
Argus rectier and power system products, bearing the aforementioned CSA marks, are
certied to CSA C22.2 No. 950 and UL 1950, or CSA/UL 60950.
As part of the reciprocal, US/Canada agreement regarding testing laboratories, the Standards Council
of Canada (Canada’s national accreditation body) granted Underwriters Laboratories (UL) authority to
certify products for sale in Canada. (2)
Only Underwriters Laboratories may grant a licence for the use of this mark, which indicates compliance
with both Canadian and US requirements. (3)
What are NRTLs and what do they do?
NRTLs are third party organizations recognized by OSHA, US Department of Labor, under the NRTL
program.
The testing and certications are based on product safety standards developed by US based standards
developing organizations and are often issued by the American National Standards Institute (ANSI). (4)
The NRTL determines that a product meets the requirements of an appropriate consensus-based
product safety standard either by successfully testing the product itself, or by verifying that a contract
laboratory has done so, and the NRTL certies that the product meets the requirements of the product
safety standard. (4)
When was the NRTL started and who governs it?
In 1983, in a suit brought on by an independent testing laboratory, OSHA was court ordered to remove
specic references to UL (Underwriters Laboratories) and FMRC (Factory Mutual Research Corporation)
from its regulations.
In 1988, OSHA revised its regulations to remove those references and the NRTL program was
established.
The NRTL Program is both national and international in scope with foreign labs permitted.
References:
Information in this document has been developed from the ofcial websites of the respective
organizations.
(1) www.csa-international.org
(2) www.scc.ca
(3) www.ulc.ca
(4) www.osha.gov
CSA/NRTL — MARKS — BACKGROUND
argusdcpower.com
048-554-10-I1 Rev C (2004/02)
The product on which either of these marks appear
has been certied by CSA as meeting applicable
Canada/US standards.
The product on which this mark
appears has been certied by UL
as meeting applicable Canada/US
standards.

MANUAL ADDENDUM
Authorized by: FORM 954-010-10 010519c1.doc
MANUAL ADDENDUM
Unit Description: Argus Switch Mode Battery Charger
Manual P/N: 010-519-C0 Applies to Manual Revision: A
#Date Page# Line# Correction to be implemented
100-06-13 11 25 Insert:
Connect the shield of temperature probe one to E14 and connect the shield
of temperature probe two to E15.
2 15 all Disregard this page. Refer to document 048-527-10, included with this
manual, for factory service information.
3
4
5
6
7
8
9

MANUAL ADDENDUM
Unit Description: Argus Switched Mode Battery Reverting Charger
Manual P/N: 010-519-C0 Applies to Manual Revision: A
#Date Page# Line# Correction to be implemented
1 03-06-11 All Any Change “Battery Charger” to “Battery Reverting Charger”
2 2 9 Insert the following (under General/Introduction):
The Argus Battery Reverting Charger must be used with a load that has its own internal power supply. The charger is
not intended to power the load directly.
A complete system consists of the Argus Battery Reverting Charger, batteries, load with power supply, and an AC
source. The system provides a separate charging source and automatic-revert to a battery bank in the event of
an AC power interruption. The Argus Battery Reverting Charger system interfaces with the load’s normal supply
source (or the standard power supply).
The internal supply will supply the load under normal conditions. In the event that the AC source has failed, the
charger initiates a transfer process whereby the battery is connected to supply the load (see Features and
Operation sections).
3 2 9 Insert Figures (below):
Figure 1–Front view of Battery Reverting Charger (010-519-20 typical)
Figure 2–Front panel of 12V 20A Battery Reverting Charger (010-519-20)
MANUAL ADDENDUM
Authorized by: FORM 954-010-10 010519c0a__2ndAddendum Page 1 of 2

# Date Page# Line# Correction to be implemented
4 5 11 Insert Figure (below):
Figure 3–Front panel of 24V 10A Battery Reverting Charger (010-523-20)
5 7 34 Insert (under Installation/AC Connections):
Connect appropriate end of charger power cable to AC supply. The AC
feeding the charger should be the same source feeding the load power
supply. Proceed to the next section, AC Voltage Selection, before
connecting other end of charger power cable to charger.
6 13 All Replace page (Operation section) with the following:
5.0 OPERATION
5.1 Startup
Ensure all power and alarm connections are secure and the AC input voltage selection jumpers are set correctly
(see AC Voltage Selection under Installation Instructions for details). Re-install the back cover and plug the AC
cable into the rear of the unit (drawing 010-519-06, page 2).
The battery fuse(s) should be installed after AC power has been applied to the charger and the POWER ON LED
is illuminated. Although this procedure is not critical it will ensure a more controlled charging of the output filter
capacitors, and power up of the control circuitry in the charger.
To properly start up and test the battery reverting charger the DC connections to the load, AC connections for
both the charger and for the connected load must be connected.
Turn on the AC power to both the charger and the connected load. The load will be powered by its own internal
supply and the charger will be charging the system battery.
5.1.1 Test Transfer Function
Remove AC power from both the battery revert charger and the connected equipment. With the AC removed the
charger will connect the battery to the load instantly.
Reconnect AC power to both the charger and the connected load and the charger will disconnect the battery from
the communications equipment and will start recharging the battery. The communications equipment will now be
powered from its own internal power supply.
Note: Due to the nature of the transfer sensing circuitry section 5.1.1 is the only effective method of testing the
transfer circuitry. Bench testing the charger without the connected load will not effectively test the transfer function.
5.2 Shutdown
Ensure the battery is not connected to the load (the ON BATTERY LED(s) are off). Remove the battery fuse(s).
Unplug the AC cable from the rear of the charger.
5.3 Default Operating Mode
The charger’s default operation is in Float mode. The POWER ON and FLOAT MODE LEDs are illuminated.
To change from FLOAT mode to EQUALIZE mode press and hold the FLOAT/EQUALIZE Mode button for 3
seconds. When the charger changes to EQUALIZE mode the output voltage will increase (see Battery Output
Voltage specifications). Pressing this button again will revert to FLOAT mode (no 3 second delay).
NOTE: Refer to Sections 3.3 and 3.4 regarding Equalize mode, controls and other features of charger operation.
5.3.1 Typical System (Transfer Process)
During AC power, the purpose of the charger is to charge and maintain the battery bank in a Float mode with
automatic equalization every 30 days. The battery bank becomes the source of power to the load when AC power
fails, and the charger is turned off.
Under AC power fail condition, the automatic revert circuit detects this condition and connects the load to the
battery for backup battery operation. After normal AC power is restored, the battery and charger are automatically
disconnected from the load and, at that time, the charger will begin to recharge the battery.
MANUAL ADDENDUM
Authorized by: FORM 954-010-10 010519c0a__2ndAddendum Page 2 of 2

IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS - This manual contains important safety and operating
instructions for the Argus battery charger:
1. Before using battery charger, read all instructions and cautionary markings on:
(1) battery charger, (2) battery, and (3) product using battery.
2. CAUTION - To reduce risk of injury, charge only lead-acid or NiCad type rechargeable
batteries. Other types of batteries may burst causing personal injury and damage.
3. Do not expose charger to rain or snow.
4. Use of an attachment not recommended or sold by the battery charger
manufacturer may result in a risk of fire, electric shock, or injury to persons.
5. Do not operate charger if it has received a sharp blow, been dropped,
or otherwise damaged in any way; take it to a qualified service center.
6. Do not disassemble charger; take it to a qualified service center when service or repair
is required. Incorrect reassembling may result in a risk of electrical shock or fire.

INSTALLATION AND OPERATOR'S MANUAL FOR ARGUS BATTERY CHARGER
Table of Contents
1.0 WARRANTY
2.0 DOCUMENTATION - PART NUMBER INFORMATION.........................................................................1
2.1 Introduction..................................................................................................................................1
2.2 ARGUS Numbering system........................................................................................................1
3.0 GENERAL................................................................................................................................................2
3.1 Scope..........................................................................................................................................2
3.2 Introduction..................................................................................................................................2
3.3 Features......................................................................................................................................2
3.3.1 Battery Transfer Circuit:..............................................................................................2
3.3.1.1 Current Flowing into Battery:......................................................................2
3.3.1.2 Connecting the Battery to the Load: ..........................................................2
3.3.1.3 Manually disconnecting the battery from the load. ....................................2
3.3.1.4 Automatically disconnecting the battery from the load: .............................3
3.3.1.3.1.....AC Failed at time of transfer ..................................................3
3.3.1.3.2.....AC Valid at time of transfer ...................................................3
3.3.2 Low Voltage Disconnect (LVD):..................................................................................3
3.3.3 Auto Equalize:.............................................................................................................4
3.3.4 Over Voltage Protection (OVP) Reset:.......................................................................4
3.3.5 Temperature Compensation:......................................................................................4
3.3.6 Reverse Battery Protection.........................................................................................5
3.4 Controls and Indicators:..............................................................................................................5
3.4.1 Power On Indicator:....................................................................................................5
3.4.2 Battery Disconnect (Reset) Switch:............................................................................5
3.4.3 Float Mode Indicator:..................................................................................................5
3.4.4 Float/Equalize Mode Switch: ......................................................................................5
3.4.5 Equalize Mode Indicator:............................................................................................5
3.4.6 Temperature Compensation Mode Indicator:.............................................................5
3.4.7 Voltage Down and Voltage Up Pushbuttons (12V and 24V sections):......................6
3.4.8 Over Voltage Protection Indicator (12V and 24V sections): ......................................6
3.4.9 Low Voltage Disconnect Indicator (12V and 24V sections):......................................6
3.4.10 Charger Fail Indicator (12V and 24V sections):.........................................................6
3.4.11 On Battery Indicator (12V and 24V sections):............................................................6
3.4.12 Test Points (12V and 24V sections):..........................................................................6
3.4.13 Output Current Indicators (12V and 24V sections):...................................................6
4.0 INSTALLATION INSTRUCTIONS............................................................................................................7
4.1 Tools Required............................................................................................................................7
4.2 Inspection....................................................................................................................................7
4.3 Preparation/Mounting..................................................................................................................7
4.4 Connections ................................................................................................................................7
4.4.1 AC Connections..........................................................................................................7
4.4.2 AC Voltage Selection..................................................................................................8
4.4.3 Battery Connection .....................................................................................................9
4.4.4 Load Connection.........................................................................................................9
4.4.5 Alarm Contacts Connections......................................................................................11
4.4.5.1 On Battery Alarm........................................................................................11
4.4.5.2 Over Voltage Protection Alarm...................................................................11
4.4.5.3 Charger Fail Alarm .....................................................................................11
4.4.6 Temperature Compensation Probe Installation..........................................................11

5.0 OPERATION ....................................................................................................................................13
5.1 Startup.........................................................................................................................................13
5.2 Shutdown ....................................................................................................................................13
6.0 SETTINGS / ADJUSTMENTS .................................................................................................................14
6.1 Factory Settings..........................................................................................................................14
6.2 Adjustments.................................................................................................................................14
6.2.1 Adjustment Ranges.....................................................................................................14
6.2.2 Voltage Adjustment.....................................................................................................14
6.2.3 Voltage Adjustments With Temperature Compensation ............................................14
7.0 FACTORY SERVICE INFORMATION.....................................................................................................15
7.1 Moving And Storage ...................................................................................................................15

010-519-C0 Rev. A Page 1 of 15 ARGUS TECHNOLOGIES
2.0 DOCUMENTATION - PART NUMBER INFORMATION
2.1 Introduction
Please read this manual thoroughly prior to use in order to become familiar with the unit's numerous
features and operating procedures. To obtain a maximum degree of safety, follow the prescribed
sequences as outlined.
This manual incorporates warnings and notes to the user. Points that are vital to the proper opera-
tion or safety of the operator are indicated by the heading: WARNING. Points that are important to
the performance or ease of use of the equipment are covered by a notation that is double under-
lined.
Items that refer to physical components or features such as indicator lights will be in Bold Italic
typeface. Items that refer to states or modes or generated messages will be in BOLD UPPER-
CASE typeface.
2.2 ARGUS Numbering system
ARGUS Technologies uses a eight digit drawing number system which is broken into three blocks.
The first three digits describe the category of the product ie. rectifier or fuse panel. The next three
digits indicate the sequence in which the product number was allocated in a particular category.
The last two digits indicate the type of drawing ie:
05 .................Schematic
06..................Outline Drawing
20 .................Main Assembly
ARGUS Technologies uses a eight digit part numbering system for all components and sub assem-
blies. Each part is covered by its own unique number. Due to the quantity categories will not be
listed within this manual.

3.0 GENERAL
3.1 Scope
This instruction manual covers the installation, and operation of Argus Technologies' Battery
Charger.
3.2 Introduction
The Argus Battery Charger employs a high frequency switched mode conversion technique to pro-
vide a fully regulated and isolated DC output from the A.C. mains. The unit provides external con-
nections for input, output and alarm interfaces. The units are available in 12V single output, 24V
single output and 12V/24V dual output models.
3.3 Features
The following sections (3.3.1 through 3.3.6) will cover the various features available on the Argus
Battery Charger.
3.3.1 Battery Transfer Circuit:
The transfer process (connecting the battery to the load) is hardware controlled and so transfer can
occur even in the event the micro-controller is not functioning. The charger firmware can discon-
nect the battery from the load in one of two ways.
1) Standard Disconnect: The micro-controller disconnects the load but does not disable the
transfer circuitry. If the load power supply is not functioning the load voltage will drop to the
transfer voltage (about 11.5V) and the transfer circuit will reconnect the battery.
2) Hard Disconnect: The relay connecting the battery to the load will be forced off and the
transfer circuitry will be disabled for 10 seconds. The transfer circuitry will re-enable afer the
load voltage has; a) risen about 0.2V (0.4V) above the battery voltage, or b) fallen to the low
voltage disconnect level. The transfer circuitry will then be reenabled in preparation for the next
transfer. The load will be disconnected from the battery regardless of the condition of the load
power supply.
3.3.1.1 Connecting the Battery to the Load:
The transfer circuit will connect the batteries to the load in less than 1 ms from the time the voltage
at the output of the charger (connected to the load) drops to 11.5V from greater than 12.0V.
The load voltage must exceed 12.0 V in order to reset the transfer circuitry. If the load voltage
does not rise above 12.0 V before failing transfer may not occur.
The charger will turn off as soon as a transfer takes place.
3.3.1.2 Manually disconnecting the battery from the load.
To manually disconnect the battery from the load press the battery disconnect switch located on the
front panel of the charger. The charger will do a hard disconnect.
ARGUS TECHNOLOGIES 010-519-C0 Rev. A Page 2 of 15

3.3.1.3 Automatically disconnecting the battery from the load:
When a transfer occurs the batteries will be connected to the load for a minimum of 2 seconds.
After this period has expired the following will dictate when and how the battery is disconnected
from the load:
3.3.1.3.1 Current flowing into the battery:
When the control circuitry detects current flowing (about 3A) into the battery a standard discon-
nect will be performed regardless of the battery or load voltage.
If 6 standard disconnects have been attempted and the battery has not been disconnected a
hard disconnect will be asserted.
3.3.1.3.2 AC Failed at time of transfer
When a transfer takes place the charger checks to see if the AC source has failed. The
charger assumes the AC feeding the charger is the same source that feeds the load power sup-
ply.
When AC power returns the charger will do a standard disconnect about once per second for
about 6 seconds. If the charger has been unsuccessful in disconnecting the battery from the
load it will do a hard disconnect.
3.3.1.3.3 AC Valid at time of transfer:
This condition would occur if the load power supply were to fail or turn off for some reason
other than loss of AC power.
When the load power supply has returned it will start sourcing current into the battery. The
charger will perform a standard disconnect when the battery voltage exceeds 12.0V (24.0V) and
one of the following conditions becomes true:
1) The battery voltage is increasing at a rate that would indicate normal power has been re-
stored to the load.
2) The voltage at the system output of the charger connector exceeds the last float voltage
less 0.25V (0.5V for the 24V battery).
In the event the load is disconnected and the normal power supply for the load has not returned
the transfer circuit will immediately reconnect the batteries to the load. The battery will be con-
nected to the load for a minimum of 2 seconds.
3.3.2 Low Voltage Disconnect (LVD):
After the battery voltage drops to a critical voltage of 10.8 V (21.6 V) the transfer circuit(s) will de-
energize the load relay(s) and disconnect the batteries from the load.
For the dual voltage charger the 24 V output will disconnect independently from the 12 V output. If
the 12 V output drops to the critical level both outputs will be disconnected from the load.
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AC power must be restored and the battery voltage must rise to 12.0 V (24.0 V) before the LVD
condition is cleared.
The low voltage disconnect will not function if the micro-controller is not functioning.
There will still be a maximum current draw of 60 mA on the battery (12 V or 24 V) for single output
systems and 80 mA from the 12 V battery and 20 mA from the 24 V battery in dual output systems
after battery cutoff to power some indicator LEDs and other circuitry needed to moniter the condi-
tion of the batteries and charger.
During low battery voltage cutoff all alarm relays will be deenergized (indicating: Charger Fail, NOT
On Battery and NOT Overvoltage Shutdown) regardless of the condition of the alarm.
3.3.3 Auto Equalize:
The unit will automatically change to EQUALIZE mode after being in float mode for 30 days. It will
remain in EQUALIZE mode for 24 hours and then automatically revert back to FLOAT mode.
When the charger changes to EQUALIZE mode the output voltage will increase (see Battery Output
Voltage Specification)
Individual cell voltages in a battery tend to drift over time unless the battery is cycled. The overall
battery voltage remains constant but some cell voltages will increase while others decrease.
Increasing the battery voltage periodically tends to equalize the individual cell voltages which opti-
mizes the battery reserve time and overall life expectancy.
3.3.4 Over Voltage Protection (OVP) Reset:
The unit will automatically reset an OVP trip up to 3 times in 1 minute. If more than 3 OVP trips oc-
cur in 1 minute, the unit will latch off. The unit can be restarted by pressing the RESET switch.
3.3.5 Temperature Compensation:
Compensation will be linear 21 mV / °C (12 mV / °F) for the 12 V output and 42 mV / °C (24 mV /
°F) over the temperature range 0 °C to +50 °C (+32 °F to +122 °F).
The temperature compensation has provision for 1 or 2 temperature probes. The second probe is
for redundancy and is not intended to compensate a second battery string.
If two probes are used they must be located in the same area. If the probes are placed in different
locations and a temperature difference of greater than 5 °C (9 °F) exist between the probes the
compensation will be turned off and the TEMP COMP LED will flash. The charger will reset the volt-
age to the nominal float voltage at +25°C (+77 °F).
If the probes indicate a temperature above +100 °C (+212 °F) or below -75 °C (-103 °F) tempera-
ture compensation will be turned off and the TEMP COMP LED will flash. The charger will reset
the voltage to the nominal float voltage at +25°C (+77 °F).
See 'Temperature Compensation Probe Installation' for details on probe location and installation.
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3.3.6 Reverse Battery Protection:
In the event the battery is installed backwards fuse(s) F4 (F200) in the charger will blow. Ensure
fuses are replaced with the proper rated fuse(s).
Fuse Rating Manufacturer
F4 30A/65VDCVery Fast Blow Buss: GBB - 30 or equiv.
F200 10A/65VDCVery Fast Blow Buss: GBB - 10 or equiv.
The SCRs and relays to the load will not close unless a valid battery voltage is present. Installation
instructions must be followed during installation of the charger and batteries.
3.4 Controls and Indicators:
The following sections (3.4.1 through 3.4.13) will cover the various controls and indicators available
on the Argus Battery Charger.
3.4.1 Power On Indicator:
Green LED marked Power On. This LED is on when AC is applied to the charger.
3.4.2 Battery Disconnect (Reset) Switch:
Momentary push button marked BATT DISC (Reset). Pressing this switch will disconnect the bat-
tery from the load and reset the micro-controller. The unit will turn off as long as the reset switch is
depressed.
3.4.3 Float Mode Indicator:
Green LED marked Float Mode. This LED is on whenever the unit is on and in FLOAT mode.
3.4.4 Float/Equalize Mode Switch:
Momentary push button located between the float mode and equalize mode LED indicators. To
change from FLOAT mode to EQUALIZE mode press and hold this button for 3 seconds. When the
charger changes to EQUALIZE mode the output voltage will increase (see Battery Output Voltage
specifications). Pressing this button again will revert to FLOAT mode (no 3 second delay). The
unit will remain in EQUALIZE mode up to a maximum of 24 hours before automatically reverting to
FLOAT mode.
3.4.5 Equalize Mode Indicator:
Amber LED marked Equalize. This LED is on whenever the unit is on and in EQUALIZE mode.
3.4.6 Temperature Compensation Mode Indicator:
Amber LED marked Temp Comp. This LED is on whenever the unit is actively compensating the
battery voltage. This LED will flash if a problem exists which prevents proper reliable operation of
the temperature compensation system. The LED will be off when ever the temperature compensa-
tion system is disabled.
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3.4.7 Voltage Down and Voltage Up Pushbuttons (12V and 24V sections):
These momentary push button switches will increment and decrement the output voltage of the
charger. Steps are approximately 50mV for the 12 volt output and 100mV for the 24 volt output. If
the unit is in EQUALIZE mode and either of these buttons are pressed then the unit will immediate-
ly revert to FLOAT mode. The voltage setting can not be increased while the unit is in CURRENT
LIMIT mode.
3.4.8 Over Voltage Protection Indicator (12V and 24V sections):
Red LED marked OVP. This LED is on whenever the unit has turned off due to an OVER VOLT-
AGE condition of the output. This LED will always indicate the true condition of the OVP system re-
gardless of a low voltage disconnect unlike the OVP relay.
3.4.9 Low Voltage Disconnect Indicator (12V and 24V sections):
Red LED marked LVD. This LED is on whenever the charger has disconnected the battery from the
load due to a low battery voltage.
3.4.10 Charger Fail Indicator (12V and 24V sections):
Red LED marked FAIL. This LED is on whenever the charger is unable to source power. Possible
fail conditions are AC fail, on battery mode, VOUT < 9 V, fuse fail, unable to source current into the
battery.
3.4.11 On Battery Indicator (12V and 24V sections):
Amber LED marked On Battery. This LED is on whenever the battery is connected to the load.
3.4.12 Test Points (12V and 24V sections):
Test points for 0.080” test probes. The test points indicate the charger output voltage inside the
charger output fuse(s). A 4.99 kohm resistor is in series with both the + and - test points to provide
short circuit protection.
3.4.13 Output Current Indicators (12V and 24V sections):
4 Green LEDs. These LEDs indicate the current flowing from the charger to the battery. Each LED
represents approximately 25% of full load. They do not indicate the amount of current following from
the battery to the load during a transfer. A flashing LED indicates current limit mode.
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