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Victor SPX User Guide
vexpro.com ctr-electronics.com
Copyright 2018, VEX Robotics Inc., Cross the Road Electronics
Updated: 2021-11-29
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robot’s design does not allow for a direct connection to the PDP, extension cables may be used.
Always keep good electrical practices in mind when designing a robot's electrical system. The Victor SPX's
source voltage should never exceed 28V. In addition, a 40A or smaller breaker should be used in series with
the Victor SPX's positive input.
WARNING: TO MAXIMIZE PERFORMANCE, THE VICTOR SPX DOES NOT INCLUDE REVERSE
POLARITY PROTECTION. IF POWER IS APPLIED BACKWARDS, THE VICTOR SPX MAY BE
PERMANENTLY DAMAGED.
Controlling the Victor SPX
The Victor SPX was intended to be a drop-in replacement for the Victor SP, allowing teams to use either
basic control over PWM – or make the jump to more advanced control over CAN bus. To make this easier
for teams, we’ve included a standard 3 pin (0.1” pitch) connector on each of the Green/Yellow twisted pairs.
One set of wires has a female connector and the other has a male connector.
CAN bus
Using the CAN bus to control the Victor SPX allows users to take full advantage of all its features. To wire the
CAN bus, connect a yellow signal wire to the CAN terminal marked “H” on the NI roboRIO and connect a
green signal wire to the CAN terminal marked “L” on the NI roboRIO.
To connect additional Victor SPXs, use tightly crimped connectors to connect the signal wires green-to-green
& yellow-to-yellow as shown below. For the best connection, it is highly recommended that each connector is
crimped and soldered. The yellow and green wires should also be wrapped in a twisted pair fashion (not
illustrated) to maximize tolerance to electrical noise.
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.
120 Ω
Resistor
or PDP
To CAN “H”
Terminal
To CAN “L”
Terminal
