Preparing The Charger For Operation - Samlexpower SEC-1245A Owner's Manual

PREPARING THE CHARGER FOR OPERATION

AC INPUT CONNECTION
The charger is pre-set to operate from input AC voltage of 120 VAC, 60 Hz and is
provided with a 6 ft attached cord with molded NEMA5-15P plug. Please ensure that the
AC outlet is 2 pole, 3 wire grounding type – "NEMA5-15R"
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 45 A of SEC-1245A and 25 A
the batteries depending
of SEC-2425A will be shared among the connected banks of
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)
CHARGING MORE THAN ONE BANK OF BATTERIES
CAUTION! When charging more than one bank of batteries at the same time using 3
Stage Charging, ensure that the batteries in the banks are in a similar discharged
condition. If one bank is completely discharged and another is almost fully charged, the
bank that is fully charged will be subjected to over charge condition during the time
when the charger remains in Stage 2 for charging the completely discharged bank.
If 2 banks of batteries are required to be charged and they are at different discharged
conditions, select "2 Stage Charging" with the help of switches S1 and S2 of the set of 4
Dip Switches (5) (both S1 & S2 in off condition) – See under "Selecting the Type of
Battery and Charging Stages"
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