Adjective: auxiliary - providing supplementary or additional help and support. Okay, we all get that. But what does it have to do with my speed controller?

When the Castle Phoenix Edge line was introduced for heli and plane applications, we announced the addition of the user programmable auxiliary wire. Our car enthusiasts will now have a taste of the simplicity and convenience if this feature with the Mamba X Series Electronic Speed Controllers (ESC).

In short, the auxiliary wire is an extra white wire, that when connected to an open channel on your radio, allows users to take advantage of on-the-fly adjustments (using your transmitter) that would otherwise be modified or set using the Castle Link Programming Suite. The feature is enabled through the Castle Link Programming system and one mode may be selected at a time.

Mamba X Series ESCs (Mamba Micro X, Micro X2, Mamba X, Monster X, Monster X 8S, Mamba XLX and Mamba XLX 2)

Let’s take a look at the available options, we are certain you’ll find a favorite or two.

Max Throttle Adjustment The ESC’s maximum power is scaled from 10% to 100% depending on the signal received on the AUX wire. Perfect for passing the controls to children, neighbors or your boss.

Max Reverse Adjustment The ESC’s maximum reverse power is scaled from 10% to 100% depending on the signal received on the AUX wire.

Max Brake Adjustment The ESC’s maximum braking power is scaled from 10% to 100% depending on the signal received on the AUX wire.

Drag Brake Adjustment The ESC’s drag brake setting is scaled from 0% to full brake depending on the signal received on the AUX wire.

Reverse Enable/Disable (Only works in modes with reverse) Reversing is disabled when the controller receives an AUX wire signal above 50% (>1.5ms). When the controller receives an AUX wire signal below 50% (<1.5ms) or if the AUX wire is disconnected, reverse capability is enabled.

Torque Control Adjustment The ESC’s torque control setting is scaled from 0.1 to 5.0 depending on the signal received on the AUX wire. Torque control is disabled when the input exceeds 1.9ms. Great for finding the perfect torque control setting for your track and tires. (Motor test must be performed before using this setting.)

Datalog Erase Enable When the vehicle is stopped, toggling the AUX signal for a few seconds will erase the datalog. The motor will emit a long beep to indicate the log was erased. This feature can be added to any of the other AUX wire modes by checking the Idle Datalog Erase box in Castle Link.

Castle Phoenix Edge Series

Gain Input (ESC must be in a governor mode) Connect the AUX line to an open channel on your receiver and use this mode to adjust the governor gain in real time. 0% TX signal equals a gain of 1 (min) – 100% TX signal equals a gain of 50 (max).

Tech Tip: Once the gain has been tuned via the Tx its value can be displayed on the data logger. Permanently save that value in the Edge via Castle Link programming and use the Aux. wire for another feature!

Audible Beacon Connect the AUX line to an open channel on your receiver and this mode will use the motor to emit an audible locator signal when the AUX line is above 50%. The beacon is only emitted if the motor is not running.

RPM Out Connect the AUX wire to 3 axis gyros that support RPM sensors and the ESC will toggle the AUX line at every electrical commutation. Divide this number by your number of magnetic pole pairs for mechanical RPM.

Arm Lock Key – requires ARM LOCK HARNESS When the ARM LOCK key is in the socket, the controller will be incapable of arming. Once removed, the ESC will arm when it receives the low throttle command on the traditional throttle line. RX Arm Lock The controller won’t arm or run when the auxiliary channel is below 50% throttle.

Tech Tip: Loss of Aux wire signal during use reverts selected mode to default status.

So there you have it, the quick and dirty on Castle AUX wire functionality. Its sheer purpose is to provide at-your-fingertips options and adjustments to give you great flexibility, versatility and most importantly, the competitive edge!

TECH TIP: AUX WHAT???