Preparing The Charger For Operation - Samlexpower SEC-1260A Owner's Manual

PREPARING THE CHARGER FOR OPERATION

SELECTING AC INPUT VOLTAGE
The charger is pre-set to operate from AC input voltage of 120 VAC, 50 / 60 Hz.
To operate the charger from AC input voltage of 230 VAC, 50 / 60 Hz, change the internal
setting as follows:
1. Remove the bottom cover plate by removing the 4 screws. Please note that the bottom
cover plate has 4 rows of ventilation slots towards one end of the plate and this end with the
slots is placed towards the end of the housing with the output terminals.
WHEN THE BOTTOM COVER PLATE IS FITTED BACK, ENSURE THAT THIS END OF THE PLATE THAT HAS THE
SLOTS IS TOWARDS THE TERMINAL SIDE OF THE HOUSING AND NOT TOWARDS THE OTHER SIDE OF THE
HOUSING THAT HAS THE FAN (THIS IS NECESSARY TO CREATE PROPER AIRFLOW PATH BY THE SUCTION
CREATED BY THE FAN) .
2. Locate the yellow colored loop of wire with black colored, female quick disconnect terminal
lugs (here-in after called the "Shorting Link"). This is located towards the fan side and near
the two input filter capacitors and the bridge rectifier with the heat sink. In the pre-set
condition for 120 VAC operation, this Shorting Link shorts the two vertical pins located at
points marked "C" and "D" on the circuit board. For 230 VAC operation, remove the Shorting
Link by pulling the black quick disconnect lugs upward. Store this Shorting Link for conversion
back to 120 VAC operation, when required. Alternatively, disconnect any one end of the
Shorting Link by pulling the black terminal lug upwards. Tape the disconnected end with
insulation tape.
3. Replace the AC plug of the power cord with a suitable 3 pin grounded plug to
mate with the 230 VAC outlet.
CAUTION!
The new plug should have 3 poles i.e. Line ( L ) , Neutral ( N ) and Earth ground.
Color code for the power cord conductors is : Line ( L ) - Black , Neutral ( N ) - White and
Earth Ground - Green).
CONNECTING THE BATTERIES OR OTHER DC LOADS
The output of the charger has a common Negative (-) connector (3) and 2 Positive connectors
(1, 2) for connection of 2 banks of batteries. Each Positive connector has its own internal
isolating diode which works as a battery isolator. If more than one bank of batteries is connected,
these will be charged at the same time as long as the AC power is available to the charger (the
maximum charging current of 60 A of SEC-1260A, 80 A of SEC-1280A and 40 A of SEC-2440A
will be shared among the connected banks of the batteries depending upon their discharged
states). In case the AC power fails or if there is no output from the charger, the isolating diodes
will prevent charging / discharging among the batteries connected to the banks.
CAUTION!
When a single bank consisting of more than one battery in parallel is to be charged,
make sure that their negatives are connected to the common negative connector (3) of the
charger and their positives are connected to the same positive connector ( either 1 or 2) of the
charger. For example, when charging a bank consisting of 3 batteries connected in parallel, their
3 negative terminals should be connected to the common negative terminal (3) of the charger
and all their 3 positive terminals should be connected to the same positive terminal of the
charger ( either 1 or 2). Alternatively, the negative terminals of the 3 batteries should first be
shorted and then connected to the common negative terminal (3) of the charger and similarly,
the 3 positive terminals of the battery should first be shorted and then connected to one of the
2 positive terminals of the charger (either 1 or 2).
When connecting a single battery or other DC load, it can be connected to the common negative
(3) and any one of the 2 positive terminals (either 1 or 2)
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