Samlexpower SEC-1260A Owner's Manual page 19

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 ("Uo" Phase) for charging the completely discharged bank.
If 2 banks of batteries are required to be charged and they are at different discharged condi-
tions, select "Loaded Battery" (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".
SELECTING THE TYPE OF BATTERY AND CHARGING STAGES
The Float or Maintenance Charge Mode ("U" Phase) voltage and Absorption / Boost Charge
Mode ("Uo" Phase) voltage of different types of Lead Acid Batteries are different.
3 Stage charging (Stages 1, 2 and 3) is recommended when charging stand alone, unloaded
battery (The battery has no load connected to it when it is being charged).
When the charger is used to charge a battery and simultaneously supply an external load, the
voltage level of Stage 2 is required to be set to the same level as the voltage of Stage 3 to
prevent over-charging. Effectively, the battery will be charged in 2 stages only – Stage 1 and
Stage 3. This also applies when two banks of batteries are being charged simultaneously and
the batteries in the two banks are in a dissimilar state of discharge.
A pair of switches S1 & S2 out of a set of 4 DIP Switches (5) has been provided for selecting
the battery type and for modifying the Boost Stage when charging loaded batteries / two
banks of batteries with different discharged states. The following selections can be made
with the help of the DIP Switches S1 and S2:
CAUTION! Do not change the DIP Switch setting when the charger is operating. Always
change the DIP Switch setting when the charger is off, i.e. after disconnecting the charger
from the AC input power).
NOTE: The voltages are for battery temperature of 80º F.
DIP Switch Setting for SEC-1260A & SEC-1280A
S 1 S 2 Float
Stand-alone charging
OFF * ON * 13.5 V * 14.4 V * Flooded / AGM *
ON OFF 13.5 V
Charging loaded battery
or
Charging two banks and the batteries in the two banks are in dissimilar discharged condition
OFF OFF 13.5 V
* Factory preset in this position
Boost Battery Type
/ Application
14.0 V Gel Cell
13.5 V Loaded Battery
(can be Flooded
/ AGM / Gel Cell)
Page 18
Charging Stages
3 Stages (Stages 1, 2, 3)
3 Stages (Stages 1, 2, 3)
2 Stages (Stages 1, 3)