Spektrum PowerSafe AR12120 User Manual page 3

EN
Specifications
PowerSafe Main Unit
Voltage input: 6.0 to 10.0 volts
Minimum operational voltage: 3.5 volts
Continuous current: 35 amps
Peak current: 50 amps
Resolution: 2048
Main unit dimensions LxWxH: 46.5 x 52 x 15.3mm
Weight: 72 g
Connector type: EC3
Regulator: None
Remote Receiver
Dimensions LxWxH: 25.8 x 20.2 x 6.8mm
Weight: 3 g
Items Included
SPMAR12120 PowerSafe Main Unit
SPM9645 Four Remote Receivers
SPM6820 Soft Switch
SPM9014 One 36" Remote Receiver Extension
SPM9013 One 24" Remote Receiver Extension
SPM9012 One 12" Remote Receiver Extension
SPM9011 One 9" Remote Receiver Extension
SPM6803 Male/Female Bind Plug
EFLAEC302 Two EC3 Battery Connectors, Female
Instruction Manual
Two JR-type Charge Receptacles
Battery Requirements
Using One Battery
The PowerSafe allows the option of using one or two battery packs. When using
one battery simply plug the battery into either one of the two battery connectors
(BATT 1 or BATT2). Be sure to secure the unused battery connector. Note that the
open contacts of the unused battery are not back powered (not electrically hot),
however, the unused connector should be secured to prevent it from entangling
during flight. When the system is powered using one battery, a single blue LED will
constantly emit when the system is powered on.
Using Two Batteries
The PowerSafe offers a true redundant dual battery system. When using two battery
packs, each pack functions independently and is isolated from the other, so that if
one pack should fail (open circuit, short-circuit, or become discharged), the other
battery will provide power to operate the system. When using dual batteries, it' s
important that both batteries be of the same capacity and ideally of the same age
and condition.
4
It' s normal for one battery to discharge slightly more than the other. This is the
nature of a truly redundant isolated battery system. The battery that has the higher
voltage or lower internal resistance will discharge at a faster rate. Generally the
difference is negligible (less than 10%). Because of this it' s normal for only one
blue LED (Batt 1 or Batt 2) to be on when the system is not under a heavy current
load depending on which pack is providing more power.
When using two batteries, the total available capacity equals the sum total of
both batteries e.g., BATT1—2000mAh + BATT2- 2000mAh = a total capacity of
4000mAh. 12- and 24-inch EC3 battery extensions are available for installations
where the battery is located a distance from the main PowerSafe unit.
Using Dual Voltage Regulators
Spektrum offers a 7.5 amp (11-amp peak) 6.0 volt regulator (SPMVR6007) specifi-
cally designed for use with the AR12120 PowerSafe.
IMPORTANT: When using two batteries powered through two regulators, each
regulator operates independently and it' s common for one battery to be dischar-
ged at a slightly higher rate depending on the condition of the battery (internal
resistance, voltage, etc.) and the tolerance of the regulators. This causes one
battery to discharge before the other and it' s important to check each battery
using a loaded battery tester (HAN171) at a recommended 1-amp load before
each flight monitoring the voltage of each pack and recharging when the
weakest pack reaches 40% capacity. (See Battery Capacity pg. 5)
Battery Capacity
It' s important to select a battery(s) that has more than adequate capacity to provide
the necessary flight time. Our staff has been recording in-flight data to determine
typical current consumption of aircraft in flight. Following are two graphs that
illustrate the in-flight current draw of the radio system. Current draws may vary
depending on your servos, installation and flying style.
5
EN