Jet Central Sequencer Plus Manual

Jet Central Sequencer Plus
Features
The Jet Central Sequencer Plus is a multipurpose electronic device, the capabilities of the unit include:
• Three part sequencer, operating landing gear and two independent sets of doors.
• Choice of three different sequence modes.
• User selected operating times for all sequencing operations
• ATV settings for endpoints on all three outputs.
• The unit is compatible with both servo and electronically operated valves.
• Gear fail"-"safe with user selectable cutoff point.
• Gear fail"-"safe with user selectable low voltage cutoff point.
• Digital air pressure gauge and voltmeter.
• Gear down"-"lock safety feature prevents the gear from retracting if the radio is turned on with the switch in the retracted
position.
• Electronic output to operate landing lights when the landing gear have been extended.
• Electronic output to trigger strobe light operation when the unit is powered up.
• Display indicates visually whether the gear is in the retracted or extended position.
Installing the Unit
Installation is straightforward, begin by plugging the unit in to the retract channel on the receiver. Then plug the main gear into the
uppermost set of pins and one or two sets of door servos or valves into their marked positions. Observe the polarity marked on the
case.
CAUTION: When connecting servos to the unit make sure that any linkages are not connected in order to reduce the chance of
damage during programming due to possible over travel and stall situations.
If the installation requires the closing of some doors with the gear extended but leaving some doors open as well (as with the F-15,
Rafale or T-45 for example), plug the doors that will close into door 1 position and the doors that will remain open into position 2.
Connect the airline to your main air system. Do not pull off the supplied tubing, as it will potentially damage the unit. The use of an
airline connector is recommended to connect the unit to the air system.
If landing lights or navigation lights are to be used, plug them into their respective slots, specifications for these outputs are listed in
Light Outputs section.
Attach the unit (e.g. with Velcro) in a location where it may be easily accessed and removed for programming, make sure to leave
enough servo wire and airline to allow easy access to the two programming push buttons in the lower right corner of the unit.
Power up the receiver and check to see that the display is operating, if you pressurize the system, you should see the numbers
increment as pressure builds.
Synchronizing the Retract Switch Position on the Transmitter
The switch position on the transmitter must be set to coincide with the sequencer indication of gear extended and gear retracted. The
transmitter ATV setting for the retract channel should be set to a typical value such as 100, please follow manufacturer's instructions for
the brand of transmitter being used. The sequencer will display
transmitter servo reverse setting as required to set the retract switch to the desired position, this is important in order for the
sequencer's low air / voltage failsafe
1, and door 2 is set with the sequencer ATV settings.
Example using Futaba 12FG Transmitter:
Retract Channel – Set to Reverse
Travel – Set to 100% & 100%
Measured Pulse Width:
Gear Retracted – 1100 uS
Gear Extended – 1940 uS
Note 1: On early production units an input voltage greater than 5.8V will not allow sequencer to operate.
Caution: The use of a voltage regulator for the system power will not indicate the true battery charge condition and therefore the low voltage fail safe
should not be depended upon for indication of low battery condition.
1
to operate properly. The finial servo travel and direction for each function i.e. gear position, door
for extended mode or display for retract mode, use the
Page 1