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SeCtION 9 |
Operation of Battery Back-up
note: The value of charge limiting resistors is based on a typical 100Ah deep cycle ma-
rine battery. If a different type of battery is used, the value of the resistor should
Be adjusted to meet associated charging requirements.
SeCtION 10 |
Output Voltage adjustment
note: The voltages indicated are at no load and are measured at any of the module
output pads under S5 and S6 or at the DC bus before the Schottky Diode D1.
parallel operation Under Forced current Share control
The output voltage of each module measured at the module output pads under
S-5 AND S-6 (see fig.1) Is factory pre-set at 14.2V. A precision multi turn potentiometer
VR1 is provided for fine adjustment of the output voltage of the module (The adjust-
ment range is 13.8V to 14.6V ).
for the forced current share control to work properly, it is important that the output
voltage of each module connected in parallel is exactly the same. when 2 or more
modules are operating in parallel under forced current share control and if the output
voltage of any module is below 14.2V, it's current share control circuitry will not function
properly and it's LED will start flashing. The LEDs of the other modules which are put-
ting out 14.2V will remain continuously lighted and the output voltage of the common
DC bus (before the Schottky Diode D1) will be 14.2V.
If the output voltage of any module is higher than 14.2V, it's LED will remain continu-
ously lighted but the LEDs of all the other modules will flash randomly. The output
voltage of the common DC bus (before the Schottky Diodes D1) will read the higher
voltage of this module.
Adjusting the output Voltage of the modules At no load
note: The output voltage is adjusted by multi turn potentiometer VR1 ( fig.1). As the
adjustment is very fine, multiple turns will be required even for small voltage change.
Turn clockwise for decreasing and anti-clockwise for increasing. The adjustment range is
13.8V to 14.6V.
As explained under "operation of Battery Back up" on page 11, although the output
voltage at the module terminals S5 and S6 (fig.1), or at the common DC bus (before the
Schottky Diode D1) is tightly regulated at the preset value of 14.2V +/-1%, The voltage
at the output terminals load + and load - will vary between 14V at no load to 13.35V at
full load of 100A due to the forward voltage drop of the isolating Schottky Diodes D1
and the drop along the DC bus and wiring.
The output voltage of the paralleled modules or the common DC bus (before the Schott-
ky Diodes D1) can be adjusted between 13.8V and 14.6V by adjusting the voltage of
each module individually as per the following procedure (this procedure is explained for
SEC-100BRM, which has 5 modules).
SAMLEX AMERICA INC. | 13
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