[RyanCahoon]

Originally Posted by team1165wins

Having tons of sensors and motors, you may get stranded with not enough I/O

Originally Posted by cgmv123

If you have too many sensors/motors, you don't need another cRIO. You're allowed a second Digital Module/Digital Sidecar in your first cRIO.

Instead of additional sidecars, the new RoboRIO has a custom electronics port that can be whatever you need it to!

Definitely the additional sidecar for motors and digital I/O. If you're using more than 20 motors and 28 GPIO pins, you may want to rethink your robot design. It will be very unmaintainable, at the least.

If you need more pneumatics control channels, you're allowed a second pneumatics module as well, or you can use the relay channels on the DSC to control spikes.

For analog I/O, an I2C I/O expansion board would be much more efficient option.