Battery Charging And Battery Backup - Samlexpower SEC-1235 Installation & Operating Manual

ADJUSTING OUTPUT VOLTAGE
!
The output voltage can be adjusted with the help of the internal potentiometer
marked "VR2". Adjustment range is (11V to 16 V).
WARNING! At output voltages higher than 13.8 V, the maximum output current
should be reduced linearly from 30 A at 13.8 V to 25 A at 16 V.
OVERLOAD / SHORT CIRCUIT
The units are protected against overload by constant current limiting at 35 A. If
the load tries to draw more than 35A, the output voltage will drop and will no
longer be regulated. The output voltage will drop to near 0 V in case of a dead
short. The unit will recover automatically once the overload condition is re-
moved.
OVER TEMPERATURE
Protection is provided to shut down the power supply in case the fan fails or if
the air flow is blocked or if the ambient temperature is very high. A temperature
sensor is mounted on the power transformer and will activate at 105° C +/- 5° C
and shut down the output of the power supply. After the power supply cools
down to 95° C +/- 5° C, the temperature sensor will de-activate and the power
supply will resume operation automatically

BATTERY CHARGING AND BATTERY BACKUP

WARNING! These units are power supplies and not battery chargers.
Do not connect these units directly to a battery
The voltage of a 12 V battery in a deep discharged condition will be around 10 to 11.4 V.
When a deeply discharged 12 V battery is charged at say 13.8 V, it will initially draw a
very large current. As the battery capacity is restored, the battery voltage increases to
around 13.8 V when fully charged and the current drawn by the battery reduces a few
hundred mA.
If a deeply discharged battery is directly charged by SEC-1235 / SEC-1235M, the battery
will initially draw a very large current and thus, will force the power supply into current
limit mode for prolonged period of time. This is harmful for the power supply as operating
under prolonged periods under current limit conditions is an abnormal operating condition.
SEC-1235 / SEC-1235M may be used for battery charging and battery backup application
only when the battery is charged through a suitable external isolating diode and charge
limiting resistor in series with the power supply. The isolating diode will ensure that the
battery does not feed power back into the power supply and the series connected
charge limiting resistor will limit the maximum charging current to a value less than the
current limit.
It is recommended that the optional Battery Backup Module BBM-12100 may be used in
conjunction with the power supply for battery charging / backup application.
Call Technical Support at 1-800-561-5885 for further assistance
PROTECTIONS
5.