1.3.3. Wiring Talon SRX for PWM Control
Before the Talon SRX can be controlled using a PWM signal, a standard 3-pin (0.1in pitch) PWM plug
must be connected to the Talon SRX’s signal wires. This can be done in one of two ways:
PWM housings and pins or sockets may be assembled directly on the Talon SRX’s
signal cables. If many Talon SRXs are being wired, this option will be cheaper but may
be more difficult for inexperienced users and may have a higher initial investment due
to the need of a specialized crimper.
A pre-assembled PWM cable may be cut and spliced onto the Talon SRX’s signal
wires. This option is more expensive if many Talon SRXs are being wired, but may be
easier for inexperienced users and may require a smaller initial investment.
In either case, the PWM cable should be wired such that the green (PWM ground) and yellow (PWM
signal) wires are on the outside of the PWM connector, as shown below. The center pin requires no
wire.
When purchasing components, be sure to order the correct gender PWM connector – different control
systems require different genders of PWM connectors. (The NI roboRIO requires a female PWM
connector.)
Only (2X) of the (4X) signal wires are needed to control the Talon SRX with PWM. Do Not connect
(2X) PWM connectors to a single Talon SRX. The (2X) wires that are not used for PWM control
should be electrically isolated using tape or heat shrink tubing and neatly bundled out of the way to
prevent damage.
Note: Signal wires of the same color are electrically identical – it does not matter which wire is used
as long as the color is correct.
After a PWM connector is installed, the Talon SRX will readily interface with the NI roboRIO and
many other microcontrollers. The PWM signal used to control the Talon SRX must be between 1-2ms
in duration with a center (neutral) pulse of 1.5ms and a period between 2.9-100ms.
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