SamplexPower SEC-1235 User Manual

SAMLEX AMERICA, INC. | 7
NOTE: The DC output connectors (RED + and Black -) have a tubular hole of diameter 0.2” (5mm) with
a set screw. If bare wire with stranded conductors is used to connect the load to the above output
connectors of the power supply, the strands will spread out as the set screw is tightened and hence, the
set screw will not pinch all the strands. As a result, the effective cross section of the current conducting
area of the wire will be reduced resulting in voltage drop at the load end, reduced efciency and also
overheat ing. For a rm connection, crimp / solder a suitable pin type of copper terminal on the wire
end to be connected to the power supply. For convenience, a pair of terminals has been provided for
crimping / soldering to the wire end.
Operation
- Ensure that the ON/OFF switch on the power supply is switched OFF and it is
un-plugged from the AC outlet.
- Switch OFF the 12V load to be connected to the power supply. Connect the Positive input wire of the
load to the RED (Positive) terminal of the power supply and the Negative input wire of the load to
the BLACK (Negative) terminal of the power supply. Ensure that the connections are secure and tight.
- Plug the power supply into the AC outlet. Press the ON/OFF switch of the power supply to the ON
position and check that the switch is illuminated indicating availability of the AC input power. If the
ON/OFF switch is not illuminated, recheck the AC input connection, AC outlet and the fuse inside
the power supply.
- The voltmeter on SEC-1235M will read 13.8V.
- Now switch ON the DC load.
- The ammeter on SEC-1235M will indicate the current drawn by the load.
- Ensure that the continuous load is limited to 30A.
Cooling Fan Control / Thermal Protection
WARNING!
Operate the unit in a well ventilated, open and cool area. DO NOT block the openings at
the fan discharge on the bottom of the unit and the suction openings on the sides.
The units are cooled by convection and by forced air cooling. A temperature controlled
fan has been provided to improve cooling at higher loads and at higher ambient tem-
peratures. The switching on of the fan is controlled by a sensor mounted on the power
transformer. The fan will be switched on when the temperature of the sensor reaches
60°C +/- 5°C. The fan will be automati cally switched off when the sensor cools down to
50°C +/- 5°C. Thus, at lower loads or during lower ambient temperatures, the fan may
remain switched OFF.
An additional protection is provided to shut down the power supply in case the fan fails or
if the air ow is blocked or if the ambient temperature is very high. A second temperature
sensor is also 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.
Adjusting Output Voltage
The output voltage can be adjusted with the help of the internal potentiometer marked
“VR2”. Adjustment range is (11V to 16V).
SECTION 3 | Product Overview

SamplexPower SEC-1235 Specifications

General

Brand	SamplexPower
Model	SEC-1235
Category	Power Supply
Language	English