Spektrum PowerSafe AR12120 User Manual page 7

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Plugging in the Servos
Plug the servo leads into the appropriate ports in the PowerSafe. You are now
ready to bind the system.
IMPORTANT: When using Y-harnesses or servo extensions, it' s important
to use standard non-amplified Y-harnesses and servo extensions as this can/
will cause the servos to operate erratically or not function at all. Amplified
Y-harnesses were developed several years ago to boost the signal for some
older PCM systems and should not be used with Spektrum equipment. Note
that when converting other models to Spektrum be certain that all amplified
Y-harnesses and/or servo extensions are replaced with conventional,
non-amplified versions.
The JR PCM Y-Harness with Amplifier (JRPA133) is not compatible with the
AR12120 and should not be used.
Binding
NOTICE: In order for the system to operate, one remote receiver must be
plugged into receiver port A and two more receivers must be plugged into
any other ports. When binding the PowerSafe with three remote receivers, if a
fourth remote receiver is added, the system must be re-bound to recognize the
additional remote.
It' s necessary to bind the AR12120 to the transmitter so that the AR12120 will only
recognize that specific transmitter, ignoring signals from any other sources. If the
PowerSafe is not bound to the transmitter, the system will not operate. During
binding, the servo' s failsafe positions are stored.
How To Bind the PowerSafe
1. With the system hooked up and all remote receivers attached as described
previously, insert the bind plug in the BIND/DATA port in the PowerSafe.
2. Turn on the soft switch. Note that the LEDs on all receivers should be flashing
indicating that the receivers are ready to bind.
3. Establish the desired failsafe stick positions, normally low throttle and flight
controls neutral.
4. Follow the procedures of your transmitter to enter it into bind mode. The system
will connect within a few seconds. The LEDs on all receivers should go solid,
indicating the system has connected.
5. Remove the bind plug and store it in a convenient place.
6. After you've programmed your model, it' s important to rebind the system so the
true low throttle and neutral control surface positions are programmed.
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Failsafe Functions
The AR12120 PowerSafe features two types of failsafe: SmartSafe
Failsafe.
SmartSafe Failsafe
This type of failsafe is recommended for most types of giant-scale aircraft. Here' s
how SmartSafe works:
Receiver Power Only
When the receiver only is turned on (no transmitter signal is present), all servos
except for the throttle are driven to their preset failsafe positions, normally all
control surfaces at neutral and the landing gear down. These failsafe positions
are stored in the receiver during binding. At this time the throttle channel has no
output, to avoid operating or arming an electronic speed control (if used). In glow-
-powered models, the throttle servo receives no input so it remains in its current
position. Some analog servos will coast (move when powered up) slightly even
though there is no signal present. This is normal.
The receivers remain in standby mode with the blue battery LEDs lit. When the
transmitter is turned on, the receiver locates the signal (GUID), connects and
normal control resumes. When connected, the amber LEDs on all attached remote
receivers will be on.
After Connection
When the transmitter and receiver are turned on and after the receiver connects to
the transmitter and normal control of all channels occurs, if loss of signal occurs,
SmartSafe drives the throttle servo to its preset failsafe position (low throttle) that
was set during binding. All other channels hold their last position. When the signal
is regained, the system immediately regains control.
SmartSafe:
• Prevents unintentional electric motor response on start-up.
• Establishes low-throttle failsafe and maintains last-commanded control surface
position if the RF signal is lost. Note: Failsafe positions are stored via the stick
and switch positions on the transmitter during binding.
Preset Failsafe
Preset Failsafe is ideal for sailplanes and is preferred by some modelers for their
glow and gas powered aircraft. Here' s how Preset Failsafe works.
Receiver Power Only
When the receiver only is turned on (no transmitter signal is present), all servos
except for the throttle are driven to their preset failsafe positions, normally all
control surfaces at neutral and the landing gear down. These failsafe positions
are stored in the receiver during binding. At this time the throttle channel has
no output, to avoid operating or arming an electronic speed control (if used). In
glow-powered models, the throttle servo has no input so it remains in its current
position. The receiver remains in standby mode with the blue battery LEDs lit.
When the transmitter is turned on, the receiver locates the signal (GUID), connects
and normal control resumes. When connected, the amber LEDs on all attached
remote receivers will be on.
and Preset
™
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