Principle Of Operation; Layout - Samlexpower PST-30S-12A Owner's Manual

The inverter converts the DC voltage of the battery to 120 V, 60 Hz. AC voltage.
The voltage conversion takes place in two stages. In the first stage, the DC voltage
of the battery is converted to a high voltage DC using high frequency switching and
Pulse Width Modulation (PWM) technique. In the second stage, the high voltage DC
is converted to 120 V, 60 Hz. sine-wave AC again using PWM technique. This is done
by using a special wave shaping technique where the high voltage DC is switched at
a high frequency and the pulse width of this switching is modulated with respect to a
reference sine-wave.
1. 120V AC output receptacle
2. L.E.D. indicator
3. On/Off Switch
4. Input terminals
RED - Positive (+)
BLACK - Negative (-)
5. Cooling fan
(back of the unit - not shown)
6. Grounding lug
Accessories Included
3' battery cable with battery clips, 3' battery cable with cigar plug
CAUTION!
Reverse polarity of input connection will blow the fuse inside the inverter and
may cause permanent damage. Ensure that the cigar lighter socket used for pow-
ering the inverter has the correct polarity with respect to the cigar lighter plug's,
positive (+) & negative (-) contact points. The contact at the tip of the cigar lighter
plug is positive (+) and the two spring loaded bow type contacts on the sides are
negative (-). Damage due to reverse polarity is not covered by warranty.

PRINCIPLE OF OPERATION

(back of unit -not shown)
(back of the unit - not shown)

LAYOUT

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