Samlexpower SEC-1280UL User manual

OWNER'S
MANUAL
Please read this
manual BEFORE
operating your
battery charger
Switch Mode,
Automatic, Lead
Acid Battery
Charger
MODELS:
SEC-1280UL
SEC-2440UL

2 | SAMLEX AMERICA INC.
OWNER'S MANUAL: Battery Chargers | Index
SECTION 1: Important Safety Precautions ......................................3
SECTION 2: Description & Features ................................................5
SECTION 3: Layout .........................................................................6
SECTION 4: Principle of Operation .................................................7
SECTION 5: Protections ................................................................14
SECTION 6: Installation ................................................................16
SECTION 7: Preparing the Charger for Operation ........................18
SECTION 8: Operation ................................................................ 25
SECTION 9: Troubleshooting ........................................................26
SECTION 10: Internal Fuse Ratings .................................................28
SECTION 12: Specications ............................................................28
SECTION 13: Warranty ...................................................................30
DETAILED PRODUCT INFORMATION
For a complete user manual including specications, application notes,
installation instructions, trouble shooting and more, please visit the web
page for this product on samlexamerica.com. Product page can be found
using the “search by model” eld.

2 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 3
SECTION 1 | Important Safety Precautions
The following safety symbols will be used in this manual to highlight safety
and information:
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.
i
INFO
Indicates useful supplemental information.
Hazardous conditions may result if the charger is not installed or operated correctly.
Please read the following instructions to prevent personal injury or damage to the
charger.
BATTERY RELATED
 
the battery.
 
engine.
 


injury.
 
 -

precautions when installing the charger near a battery or in a battery compartment

 

away from the battery as DC cables permit. Do not install in the same compartment as
batteries.
 


4 | SAMLEX AMERICA INC.
SECTION 1 | Important Safety Precautions
 
The batteries can produce a short circuit current high enough to weld a ring or the

 

CHARGER RELATED
 
  
  
 

 

 
be at least 6 inches clearance all around the unit.
 
It is recommended that installation may be carried out by a certied electrician.
 
that installation on the boat must be carried out by a boat electrician.
 

 
 

connected to earth ground.
 
this charger until proper outlet is installed by a qualied electrician.
 

4 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 5
SECTION 2 | Description & Features

O

O
O

OO
FEATURES
 
operation.
 
 
 

for stand-alone and loaded batteries.
 -

 
if required.
 
-
ing upon the depth of discharge of the connected batteries.
 
  based on output current.
 

 
when used in conjunction with a battery.
 

 
 
MAXIMUM AH CAPACITY OF BATTERY TO BE CHARGED




as follows:
 
 

6 | SAMLEX AMERICA INC.
SECTION 3 | Layout
NOTE:
Fig. 3.1 Layout of SEC-1280UL and SEC-2440UL
4 5 6 7 8
3 2 1
9
10
11
OUTPUT SIDE
INPUT SIDE
12
13
LEGEND
1. Output connector: +, Bank 1
2. Output connector: +, Bank 2
3. Output connector: –, Common
4. Jack for Temperature Sensor
5. Green LED: Indicates“Half Power
Mode” is ON
6. Jack for optional Remote LED
Panel Model No. 900-RC
7. DIP switches for mode selection
8. Push Switch for Half Power Mode:
Pressed ON; Released OFF
9. Power ON/OFF switch
10. AC power cord inlet
11. Grille protected opening for
cooling fan
12. Voltmeter
13. Ammeter
TOP VIEW
3
2
1
11
10
SEC-1280UL & SEC-2440UL

6 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 7
SECTION 4 | Principle of Operation
i
INFO





www.samlexamerica.com/support/application_notes.aspx
BATTERY CHARGER IS A CURRENT LIMITED DC POWER SUPPLY


Model No. Current Limit
Constant
Voltage at Bulk
Stage “I”
Constant
Voltage at
Absorption
Stage “U0”
Constant
Voltage at
Float Stage
“U”
SEC-1280UL   
 
SEC-2440UL   
 



-




BATTERY IMPEDANCE AND CHARGING CURRENT

impedance is higher in discharged condition due to Lead Sulfate formation and reduces



charging current drawn by the battery can be roughly calculated as follows:
Charging current = (Charger Voltage - Intrinsic battery voltage) ÷ Internal resistance (0.02 Ohm)

8 | SAMLEX AMERICA INC.
SECTION 4 | Principle of Operation




CHARGING STAGES

 
 O
 
-
ure 4.1 and for SEC-2440UL at Fig. 4.2
Figure 4.1 Charging Curve - SEC-1280UL
* Stage 2 time for 4 or 8 hours.
Voltage
curve
Current
curve
10% of
current
capacity
of charger
(8A ± 0.5A)
80% of
current
capacity
of charger
(64 Amps)
Time, Hours
14.4V
13.5V
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
55
50
45
40
35
30
25
20
15
10
5
0
AMPS V O LT S
Fig xxx - SEC-1250UL Charging Curves (Absorption 14.4V, Float 13.5V)
80A
Stage 1
“IPhase” Stage 2* “Uo Phase” Stage 3 “U Phase”
B1 C1
D1
E1
B2 C2 D2
E2
A1
A2

8 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 9
SECTION 4 | Principle of Operation
Voltage
curve
28.8V
27V
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
27.5
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
Fig xxx - SEC-2425UL Charging Curves (Absorption 28.8V, Float 27V)
B1 C1
D1
E1
B2 C2 D2
E2
40A
A1
A2
Stage 1
“IPhase” Stage 2* “Uo Phase” Stage 3 “U Phase”
* Stage 2 time for 4 or 8 hours.
Voltage
curve
Current
curve
80% of
current
capacity
of charger
(32 amps) 10% of
current
capacity
of charger
(4A ± 0,5A)
Time, Hours
AMPS V O LT S
Fig. 4.2 Charging Curve for SEC-2440UL
i
INFO
Please note the following important information related to the Charging Curves
shown in Figs 4.1 and 4.2 above:
1.1 Terminal Voltage reading on no load and on load: The output terminals of the





resistance of the diode and this drop will also increase with increase in charging
current. Please note that the forward voltage drops Vf and Vb occur only when cur-
rent ows through the diode.
1.2




10 | SAMLEX AMERICA INC.
SECTION 4 | Principle of Operation



-


UO 
UO 
 
 
1.3 
-

2.1 Standard Temperature Conditions:-

3.1 Charger / Battery Voltage / Current Values:


-






although the actual intrinsic terminal voltage of the
battery corresponding to its State of Charge at that point of time will be lower.
3.2 
-

3.3.