217-8080
Talon SRX - User’s Guide
crosstheroadelectronics.com vexpro.com
Copyright 2017, Cross The Road Electronics, VEX Robotics Inc.
Updated: 2017-02-03
Multiple Talon SRXs may be driven using a single PWM signal if a Y-Cable equivalent is used to
connect multiple PWM inputs to a single PWM output.
Note: The PWM period is how fast the robot controller can send a new PWM pulse. The amount of
time between the rising edges of two subsequent PWM pulses should not be less than 2.9ms nor
greater than 100ms.
Note: The PWM input has a logic-high minimum threshold voltage of 1.0 V. The logic-low maximum
threshold is 0.4 V. The PWM input current requirements are negligible (<1mA). This is sufficient for
most 3.3V and 5V based microcontrollers that generate PWM.
Connecting a Talon SRX to an NI roboRIO using PWM:
To connect a Talon SRX to the NI roboRIO controller, simply plug the Talon SRX’s PWM cable into
the desired PWM header in the roboRIO’s PWM output with the yellow (signal) wire on the “S” or
“inside” of the controller. The green wire will connect to the “GND” or “outside” of the controller. If an
extension cable is needed for the Talon SRX to reach the roboRIO, a standard 3-wire extension cable
should be used – these extension cables are available from VEX Robotics as well as many other
online retailers.
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