The PST-Backup UPS devices are designed
to keep your equipment from losing power or rebooting during engine
start-up, ensuring these spikes and sags in power don't shorten the life of
your mission critical electronics. We do this by providing uninterrupted,
clean, consistent power to your equipment, extending the life of your
electronics.
The PST-Backup DC-UPS powers your equipment in the vehicle
using the car or bus electrical system, but switches to external battery
power when the car's battery is removed, stolen, or drops below a predetermined
voltage, acting as a battery backup (BBU) and power conditioner. It is not
necessary to run an extra sense wire to the ignition, voltage sensing takes
care of the decision making.
The backup prevents your equipment from
running the vehicle's battery down avoiding jump-starts. It switches over
to the auxiliary battery when the engine is shut off and the alternator stops
or the car's battery drops below 11.8 volts. This means you never have to worry
about that after-market equipment leaving you with a dead battery in the
morning.
The PST-Backup isolates its battery from the vehicle,
so it can't be discharged by the vehicle's other electronics, and it won't try
to participate in the engine start-up process.
Allows for safely
charging our internal battery from the car's electrical bus by isolating
and current regulating the connection to the auxiliary battery. This
uninterruptible power supply is designed to withstand the harsh electrical and
temperature requirements of automotive equipment including spike, dropouts,
load dumps, jump-starting, high and low temperatures. |
| This DC-UPS contains a 2.4 amp-hour sealed lead
acid battery. It is charged from the vehicle's electrical system and switches
your load to its internal battery when the engine is turned off, or at any
other time that the electrical bus drops below 11.8 volts. Keeping computers
and video systems alive during engine starting or other interruptions in
power. |
| Detailed Specifications |
PST-Backup-2.4-12A |
PST-Backup-2.4-5A |
| Maximum pass-through current |
12 Amps continuous |
5 Amps continuous |
| Max Charge Current |
400 milliamps. |
400 milliamps |
| Maximum input voltage (steady state) |
15V |
15V |
| Maximum input voltage (transient) |
40V |
40V |
| Maximum pass-through wattage |
144 Watts |
60 Watts |
| Transient pass-through current |
15 amps for 40 seconds
20 amps for 5
seconds
Over 20 amps immediate shutdown
|
6 Amps for 40 seconds |
| Transition time |
Less than 50 microseconds from
main battery to auxiliary battery
less than 50 microseconds from auxiliary
battery to main battery. We have a capacitor to keep the voltage up during the
transition and have not had any problem with customer's equipment dropping out
during the switchover. |
| The available custom set points are Main
On, Main Off, Charger On, Charger Off, Aux On, Aux Off |
This
document describes how to engineer and specify the 6 custom set points if
desired |
| Backup time |
12 amps for 200 seconds
8 amps for 400
seconds
4 amps for 17 minutes
2 amps for 44 minutes
120 mA for 20
hours |
5 amps for 730 seconds
4 amps for 17
minutes
2 amps for 44 minutes
120 mA for 20 hours |
| Charge voltage |
Factory selectable, default is 11.8V |
Factory selectable, default is 11.8V |
| Internal battery |
2.4 AH Sealed lead acid battery
|
| Charge algorithm |
Constant current until the
battery voltage reaches 13.4 volts, taper charge above 13.4 volts to zero
current at 14.1 volts |
| Nominal Battery Voltage |
12 Volts |
| Size |
3 x 4.9 x 5.7 inches (6.8"
including flanges)
76 x 124 x 145 mm (173 mm including flanges) |
| Vehicle's electrical bus reconnects to
the load when its voltage raises to: |
13.5 volts |
| Load is switched to the auxiliary battery
when the main voltage drops below |
13.1 volts |
| Auxiliary battery is disconnected from
the load when the auxiliary battery's voltage drops below |
10 volts |
| Temperature Range |
Minimum ambient temperature
-10°C (-40°C available upon request)
Maximum ambient temperature of
70°C
When the case temperature gets above 45°C the charge current is
automatically reduced to maintain system operation at higher temperatures. |
| Storage Temperature |
-20°C to 70°C |
| Connection |
Screw terminals, included are
spade terminal adapters as shown below |
| Included spade (faston) connector
adapters |
 |
| LEDs |
LEDs light up showing whether
the load is being powered by the car or the auxiliary battery |
| Weight |
3.3 lbs or 1.5 kg |
| Orientation |
Can be mounted safely in any
orientation |
| Warranty |
1 year |
| |
User guide for 5A
version
User's guide for 12A
version |
