Samlex America SEC-1223BBM User Manual
Switch Mode
DC Power
Supply
with Battery
Backup
SEC-1223BBM
Owner's
Manual
Please read this
manual BEFORE
installing unit
OWNER'S MANUAL | Index
SECTION 1
Safety Instructions ................................................................. 3
SECTION 2
Layout, Output Connection & Dimensions .......................... 5
SECTION 3
Description & Principle of Operation .................................... 6
SECTION 4
Protections .......................................................................... 8
SECTION 5
Installation ........................................................................ 10
SECTION 6
Operation ........................................................................ 13
SECTION 7
Limiting Electro-Magnetic Interference (EMI) ...................... 15
SECTION 8
Troubleshooting Guide ....................................................... 18
SECTION 9
Specications ..................................................................... 21
SECTION 10
Warranty ........................................................................ 23
DETAILED PRODUCT INFORMATION
For a complete user manual including specications,
application notes, installation instructions, trouble
shooting and more, please visit the web page for this
product on www.samlexamerica.com. Product page can
be found using the “Search by Model” eld.
2 | SAMLEX AMERICA INC.
SECTION 1 | Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important Safety and Operating Instructions. Please read before
using this unit .
The following safety symbols will be used in this manual to highlight safety
and information:
Please read these instructions before installing or operating the unit to prevent personal
injury or damage to the unit.
1. DO NOT OPEN TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK. THERE ARE NO USER
2. The unit should be grounded to reduce the risk of electric shock. It comes with a
3. It is recommended that you return your power supply to a qualied dealer for any
4. To reduce the risk of electric shock, unplug the power supply from the outlet before
5. To reduce risk of damage to electric plug and cord, pull by plug rather than cord
6. An extension cord should not be used unless absolutely necessary. If an extension
WARNING!
!
Indicates possibility of physical harm to the user in case of non-compliance.
!
CAUTION!
Indicates possibility of damage to the equipment in case of non-compliance.
!
WARNINGS!
SERVICEABLE PARTS INSIDE—REFER TO QUALIFIED SERVICE PERSONNEL.
detachable power cord that has a 3 prong, grounded male plug (NEMA5-15P). The
round prong of the plug gets connected to the chassis of the unit. When the power
cord is plugged into the corresponding 3 slot female receptacle (NEMA5-15R), the
chassis of the unit is automatically connected to the Earth Ground through the
Equipment Grounding Conductor that is connected to the round slot of the female NEMA5-15R receptacle. The power cord must be plugged into a NEMA5-15R
outlet that is properly installed and grounded in accordance with all local codes and
ordinances. Never alter the power cord that has been provided. If the plug of the
cord will not t the outlet, have a proper outlet installed by a qualied electrician.
Improper connection can result in risk of electric shock.
service or repair. Incorrect assembly may result in electric shock or re.
attempting any maintenance or cleaning. Turning off controls will not reduce this risk.
when disconnecting the unit.
cord is used, make sure that it has 3-prong, grounded male plug (NEMA5-15P) and
SECTION 1 | Safety Instructions
3-prong, grounded female receptacle (NEMA5-15R). The size of the current carrying
conductors should be such that they are able to carry at least 10A for the length of
the extension.
7. Place the unit in an area that will allow air to ow freely around the unit. DO NOT
block or obstruct vent openings on the sides and at the bottom or install the unit in
an enclosed compartment.
8. Keep the unit away from moisture and water.
9. NEVER OPERATE TWO OR MORE UNITS IN PARALLEL.
10. Precautions when working with batteries.
- Batteries contain very corrosive diluted Sulphuric Acid as electrolyte. Precautions should be
taken to prevent contact with skin, eyes or clothing.
- Batteries generate Hydrogen and Oxygen during charging resulting in evolution of explosive gas mixture. Care should be taken to ventilate the battery area and follow the battery
manufacturer’s recommendations.
- NEVER smoke or allow a spark or ame near the batteries.
- Use caution to reduce the risk of dropping a metal tool on the battery. It could spark or
short circuit the battery or other electrical parts and could cause an explosion.
- Remove metal items like rings, bracelets and watches when working with batteries. The
batteries can produce a short circuit current high enough to weld a ring or the like to metal
and thus cause a severe burn.
- If you need to remove a battery, always remove the Negative Ground Terminal from the
battery rst. Make sure that all the accessories are off so that you do not cause a spark.
CAUTIONS!
!
1. Please refer to Fig 2.1 at page 5. Please ensure that the battery is connected with correct polarity - Positive of the battery to the “Battery +” terminal (6) and the Negative
of the battery to the “Battery -” terminal (5). Reversal of polarity will blow external
Fuse F1. Reversal of polarity may result in permanent damage to the unit and to the
load. DAMAGE DUE TO REVERSE POLARITY IS NOT COVERED UNDER WARRANTY.
2. Protect the unit against AC line input transients. Use Transient Suppressor in line with
the AC input.
4 | SAMLEX AMERICA INC.
SECTION 2 | Layout, Output Connection
& Dimensions
SEC-1223BBM
F2
F1
12V BATTERY 12V DC LOAD
BOTTOM VIEW
LEGEND
1. Lighted Power ON /OFF Rocker Switch (Lights Red when ON)
2. AC Power Cord Inlet – Type “IEC 320-C14” (Detachable Power
Cord with “IEC 320-C13” connector on one end and NEMA5-15P
Plug on the other end is provided with the unit)
3. Black Negative (-) DC Load Terminal
4. Red Positive (+) DC Load Terminal
5. Black Negative (-) Battery Terminal
6. Red Positive (+) Battery Terminal
7. Vent opening for cooling fan discharge (Bottom of the unit)
F1. Fast blow Fuse: 32V, 25A
F2. Fast blow Fuse: 32V, 25A
Fig. 2.1 Layout and Output Connections
SECTION 2 | Layout, Output Connection
& Dimensions
2.5
SEC-1223BBM
223
TOP VIEW
240.5
180
2.5
4
61
185
13.5
53.3
7.7
Fig 2.2 Dimensional Drawing
SECTION 3 | Description & Principle of Operation
DESCRIPTION
SEC-1223BBM is a Switch Mode Power Supply (SMPS), which converts 120 VAC, 50/60 Hz
to regulated 13.8VDC at 23A continuous. It has additional provision for battery backup
with charging in conjunction with external 12V Lead Acid Battery.
FEATURES
• AdvancedSwitchModeTechnology
• Reliable,12VDCUninterruptiblePowerSource(DCUPS)inconjunctionwithexternal
12V Lead Acid Battery backup
• Underbatterybackupfunction,shorttimeoverloadofupto50Afor<1seccanbe
supplied to allow starting of devices that require higher starting surge current.
• Highefciency,compactandportable
• Protectedagainstshortcircuit,overload,overvoltageandovertemperature
6 | SAMLEX AMERICA INC.
SECTION 3 | Description & Principle of Operation
• Coolingbytemperaturecontrolledfanimprovesefciencyandprolongslifeofthefan
• ULsafetylistedas“InformationTechnologyEquipmentPowerSupply”forUSA(UL
Standard ANSI/UL-60950-1) and for Canada (CSA Standard CAN/CSA-C22.2 No. 60950-1)
• ComplieswithFCCPart15(B),ClassBforlimitsonconductedandradiatedElectromagnetic Interference (EMI)
PRINCIPLE OF OPERATION
Please refer to the Layout at Fig. 2.1. The unit consists of 2 Sections - Switch Mode Power
Supply (SMPS) Section and Battery Backup and Charging Section. The unit works as a DC
Uninterruptible Power Source (DC UPS) in conjunction with an external 12V, Lead Acid
backup battery. As long as AC input power is available, the unit will put out 13.8 ± 0.1V
at the Load Terminals (3, 4) and provide a maximum continuous load current of 19A to
23A. At the same time, charging current of up to a maximum of 4A (When battery is
completely discharged to Standing Voltage of 11.4V) will be fed through the Battery
Terminals (5, 6) to charge the external battery. The voltage at the Battery Terminals (5,
6) will always be clamped to the actual voltage of the battery corresponding to its State
of Charge. If AC input power fails, the DC load will be instantaneously transferred to
the external 12V backup battery and the battery will start discharging. When AC input
power is restored, the DC load will once again be transferred instantaneously to the
Power Supply Section and the external backup battery will be recharged and kept in
charged condition all the time at Float Voltage of 13.5 ± 0.2V (when fully charged).
When operating in DC UPS Battery Backup Mode (external 12V battery is connected),
theunitiscapableofprovidingshort-termsurgecurrentoverloadofupto50Afor<1
sec (external 25A fuse on the load side will not blow as 50A overload occurs for a very
shortperiodof<1sec).Duringthisoverloadof50A,thePowerSupplySectionwill
provide 25A and the balance 25A will be supplied by the battery and the battery will
discharge at 25A for the period of the surge. During the period of this surge current
overload, the voltage seen by the load will be = (battery voltage – 0.3V± 0.1V).
If battery backup function is not used (external backup battery is not connected), the
unit will work as a normal power supply with ability to supply 23A continuous at 13.8
± 0.1VDC at the Load Terminals (3, 4). The maximum overload current will be limited to
25A. Under overload conditions, the output voltage will not be regulated and will drop.
COOLING AND OVER TEMPERATURE PROTECTION
The unit is cooled by convection and in addition, has a temperature-controlled fan
located at the bottom for forced air-cooling. Two Normally Closed Thermal Switches are
mounted on the windings of the Switching Power Transformer – one for fan control and
the other for over temperature shut down. When the temperature of the transformer
windings rises to ≥ 60°C ± 5°C / 140°F ± 9°F, Thermal Switch for fan control will open and
will activate fan switching circuit to switch ON the fan. When the transformer windings
cool down to ≤ 40°C ± 5°C / 104°F ± 9°F, the switch will close and de-activate fan switching circuit to switch OFF the fan.
SECTION 3 | Description & Principle of Operation
NOTE: The fan may not switch ON at all in case of low loads or in colder ambient
temperatures because the temperature of the transformer windings may not rise to
threshold of ≥ 60°C ± 5°C / 140°F ± 9°F under these conditions.
In case the fan fails or if the cooling is not adequate due to higher ambient temperature, inadequate air circulation or blockage of ventilation openings, the temperature of
the transformer windings will rise. At temperature ≥ 105°C ± 5°C / 221°F ± 9°F, Thermal
Switch for over temperature shut down will open and will activate over-temperature
protection circuit to shut down the Power Supply Section. When the windings cool
down to temperature ≤ 75°C ± 5°C / 167°F ± 9°F, the switch will close, shut down circuit
will be de-activated and the output power from the Power Supply Section will be
restored automatically. During the time the Power Supply Section is shut down due to
over temperature, the backup battery will supply the load and will start discharging.
When the Power Supply Section cools down and resets, it will once again start supplying
the load and re-charge the battery.
The fan sucks cool air from the vent openings on the sides of the unit and discharges
hot air through vent openings at the bottom of the unit. PLEASE ENSURE THAT THESE
VENT OPENINGS ARE NOT OBSTRUCTED.
!
CAUTION!
SECTION 4 | Protections
NOTE: Please refer to Fig 2.1, page 5 and explanation under heading “Principle of
Operation”, page 7.
OVER LOAD / SHORT CIRCUIT CURRENT PROTECTION
Battery Backup Function is not Used - External Battery is not Connected and
the Unit is Used as a Power Supply
In this case, the entire load current will be supplied by the Power Supply Section and will
be limited to a maximum of 25A by its Current Limit Circuitry. If the load tries to draw a
higher current than the current limit value of 25A, the output voltage at the Load Terminals (3, 4) and the Battery Terminals (5, 6) will not be regulated and will drop below
13.8V± 0.1V. If the load impedance is further reduced, the current will remain limited
at 25A but the voltage will drop further. In case of short circuit, maximum limited current of 25A will continue to be supplied into the short circuit but the voltage will drop
to<2Vincaseofaneardeadshort(Loadimpedancewillbeverylow–say<100milli
Ohm). If over-load / short-circuit current of 25A continues over prolonged period (> 100
sec), the external 25A load side Fuse (F2) will blow and will disconnect the load. If the
overload / short circuit is removed before the external 25A load side Fuse (F2) blows, the
output voltage at the Load / Battery Terminals will automatically recover when the load
current drops to less than 25A.
8 | SAMLEX AMERICA INC.
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