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SAMLEX AMERICA, INC.
WARNING! At output voltages higher than 13.8V, the maximum output current
should be reduced linearly from 30A at 13.8V to 25A at 16V.
Protections
Overload/Short Circuit
The units are protected against overload by constant current limiting at 35A. 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 0V in case of a dead short. The unit will recover auto-
matically 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.
WARNING! THESE UNITS ARE POWER SUPPLIES AND NOT BATTERY CHARGERS.
DO NOT CONNECT THESE UNITS DIRECTLY TO A BATTERY.
The voltage of a 12V battery in a deep discharged condition will be around 10 to 11.4V.
When a deeply discharged 12V battery is charged at say 13.8V, it will initially draw a very
large current. As the battery capacity is restored, the battery voltage increases to around
13.8V 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 un-
der 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.
SECTION 3
| Product Overview
