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SAMLEX AMERICA, INC.
Description & Features
SEC-1235 & SEC-1235M are Switched Mode Power Supplies (SMPS) which convert 120V,
50/60 Hz (or 230V, 50/60 Hz*) AC power to regulated 13.8V DC power based on
Pulse
Width Modulation (PWM)
control.
Note*:
The units are factory preset to operate from an
input voltage of 120 VAC, 50/60 Hz. These may be set to operate from an input voltage
of 230 VAC, 50/60 Hz by changing internal settings as described below under “Operation
from AC Input of 230 VAC”.
Features:
-
Based on switched mode technology and PWM control - output switching frequency = 30.5 KHz.
-
Compact and light weight - High efficiency and less heat dissipation.
-
SEC-1235M comes with voltmeter and ammeter.
-
Protected against short circuit, overload and over temperature.
-
Cooling by temperature controlled fan.
-
UL safety certified and listed under UL Standard UL60950-1 for Information
Technology Equipment Power Supply.
-
Complies with FCC Part 15(B) for limits on EMI for Class B Digital Devices.
Operation from AC Input Voltage of 230 VAC
These units have been preset to operate from an input voltage of 120 VAC, 50/60 Hz. The
units can be set to operate from an input voltage of 230 VAC, 50/60 Hz. by changing the
position of an internal jumper. The procedure for conversion to input voltage of 230 VAC,
50/60 Hz is as follows:
- Switch
OFF the unit and unplug the power cord from the AC outlet
-
Remove the top cover
-
For 120 VAC operation (pre-set condition), points “D” and “E” on the printed circuit board (PCB) have
been connected (shorted) with a flexible wire jumper. To convert to 230 VAC input, disconnect the
quick disconnect connector at point “D” by pulling it upwards. Tape this end with an insulation tape
and use a cable tie to tie it securely to the wire harness running above
-
The fuse on the AC side for the preset input voltage of 120 VAC is rated at 250V, 8A. For 230 VAC op-
eration, the fuse has to be rated at 250V, 4A. Replace the existing 8A fuse with a 4A fuse. See under
“SPECIFICATIONS” for details on the 4A fuse.
-
The detachable power cord that is provided has an “IEC 320-13” female connector on one end that
will mate with the “IEC 320-C14” male AC inlet connector on the power supply. The other end of
this power cord has a 120 VAC NEMA5-15P plug meant for connection to the 120 VAC, NEMA5-15R
outlet. For operation on 230 VAC, 50 Hz, a different detachable power cord will have to be used. Use
an appropriate power cord that has an “IEC 320-13” female connector on one end (for connection
to the “IEC 320-C14” AC inlet connector on the power supply) and a 230 VAC plug on the other end
corresponding to the 230 VAC outlet. Please ensure that the new 230 VAC power cord uses two pole,
3 wire grounding configuration (this will ensure proper earth grounding).
Connection & Operation
WARNING!
The unit has been pre-set to operate from an input voltage of 120 VAC. Hence, before
plugging the unit to the AC outlet, please ensure that the local AC power supply voltage
is 120 VAC. Operation from 230 VAC is possible by changing internal settings. Please see
details under “OPERATION FROM AC INPUT VOLTAGE OF 230 VAC.”
SECTION 3
| Product Overview
