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COOLING AND FAN CONTROL / THERMAL SHUT DOWN (SEC-1223CE)
SEC-1212CE is cooled by convection.
PLACE THE UNIT IN A WELL VENTILATED OPEN AND COOL AREA.
DO NOT BLOCK THE VENTILATION OPENINGS ON THE SIDES
SEC-1223CE is cooled by convection and forced air. A temperature con-
trolled fan has been provided to improve cooling at higher loads. The fan is
controlled by a sensor mounted on the power transformer. THE FAN WILL
BE OFF AT LOWER LOADS. It will come on only when the temperature of
the power transformer is above 70ºC due to higher loads. In case the fan
fails or the air flow is blocked, a second temperature sensor mounted on the
power transformer will activate over temperature shut down at 100ºC. The
output voltage will be automatically resumed once the unit cools down.
PLACE THE UNIT IN A WELL VENTILATED OPEN AND COOL AREA.
DO NOT BLOCK THE OPENINGS AT THE FAN SUCTION ON THE BOT-
TOM AND THE DISCHARGE OPENINGS ON THE SIDES .
BATTERY CHARGING AND BATTERY BACK-UP
!
WARNING ! THESE UNITS ARE POWER SUPPLIES AND
NOT BATTERY CHARGERS. DO NOT CONNECT THESE UNITS DI-
RECTLY TO A BATTERY
These units should NOT BE DIRECTLY CONNECTED TO A BATTERY for
charging or for battery back-up. Battery charging and battery back-up may
be undertaken only when the battery is connected through suitable external
isolating diodes and charge limiting resistor. The isolating diode will ensure
that the battery does not back power the power supply. When a battery is
deeply discharged, it will initially draw a very large charging current and
thus, will force the power supply into current limit mode for prolonged peri-
ods. This is harmful for the power supply. The charge limiting resistor will
limit the charging current, thereby, ensuring that the maximum charging cur-
rent is well below the current limit value of the power supply.
WE OFFER OPTIONAL BATTERY BACK-UP AND CHARGING MOD-
ULE . PLEASE CONTACT OUR CUSTOMER SERVICE
3.
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