Larson Electronics LLC www.LarsonElectronics.com [email protected]
9419 E US HWY 175, Kemp, TX 75143 - P: (800) 369-6671 - F: (903) 498-3364
CONNECTION AND OPERATION
WARNING:
Before plugging the unit to the AC outlet, please check that your local supply voltage is 120
VAC.
NOTE:
The DC output connector (RED + & BLACK-) has a tubular hole of dia. 0.2"(5mm) with a set screw.
For a firm connection, crimp a pin type copper terminal on the cable ends of your 12VDC device.
1.
Ensure that the power supply’s ON/OFF switch is off and it is unplugged from the AC outlet.
2.
Switch off your 12 VDC device and connect its positive and negative to the RED and BLACK
terminals respectively. Ensure that the connections are secure and tight.
3.
Plug the power supply into the AC outlet.
4.
Press the ON/OFF switch of the power supply to ON and observe that the neon indicator in the
switch illuminates. If the indicator fails to light, recheck the connection, AC outlet and the fuse
inside the power supply.
5.
Your 12VDC device may now be switched on.
COOLING AND FAN CONTROL/THERMAL SHUT DOWN
S-23-13.8V is cooled by convection and forced air.
A temperature controlled 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 70°C due to
higher loads. In case the fan fails or the air flow is blocked, a second temperature shut down at
100°C.
The output voltage will be automatically resumed once the unit cools down.
OPERATE THE UNIT IN A WELL VENTILATED, OPEN AND COOL AREA. DO NOT BLOCK THE OPENINGS AT
THE FAN DISCHARGE ON THE BOTTOM AND THE SUCTION 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 DIRECTLY 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.
