PS-15DR Installation Guide Rev.B.doc
2013-04-23
Strona
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3. B
ATTERY
M
ANAGEMENT
PS-15DR was designed to operate with a sealed lead-acid (SLA or AGM) 12V reserve battery. The
reserve battery is connected to output terminals trough an ultra low-resistance MOS transistor.
PS-15DR charge battery with
constant current-constant voltage method with initial charging current
set to ~0.3A. Device charges battery with initial current until the output voltage reaches 13.8V
threshold, subsequently the output voltage will remain constant, whereas charge current will
decrease spontaneously. This method of charging guaranties relatively quick and safe charging
process.
Depending on battery charging phase the output voltage of PS-15DR may vary from ~ 11.5V up to
13.8V level. When battery voltage drops below ~10.0V internal circuit disconnects it from output
load, battery is automatically reconnected when AC supply returns. Battery cut off circuit protects
battery from deep discharge while the equipment connected to it from operation below 10.0V level
which, in many cases can lead to undefined system behavior. Battery is protected with 2.5A
resettable fuse which reduce maximum output current sourced from battery in case of battery
reverse connection or output overload.
Note: When battery is charged the max output current available on AUX terminals is reduced by
value equal to actual battery charging current.
4. P
ROTECTIONS
PS-15DR has been equipped with following protections for user and device safety:
Main protection (MP):
230VAC input is protected with glass slow blow fuse that disconnects
electronic module in case when excessive current is drawn from AC line. This element isn’t available
for replacement and usually indicates very serious technical problem of the device.
Overcurrent (OCP) and short-circuit (SCP) protection:
when output current rises above its
nominal max value, device switches off and remains in this state as long as overload exists. PS-
15DR resumes its operation as soon as overload disappears.
Overvoltage protection (UVP):
the AUX outputs are protected with electronic components
which are intended to protect device from overvoltage spikes.
Overheating protection (OHP):
if temperature of the electronic module increases beyond safe
limits devices switches off and remains in this state until devices is cooled.
Battery protection (BP):
battery input is protected with resettable fuse which limits maximum
output current sourced from battery in case of reverse polarity connection or output overload. Once
the resettable fuse is triggered it is necessary to remove entire load from the battery before fuse
restores.
