neat. Could you label everything and explain some components? Like, what is the big green tube connect to?
That appears to be an “umbilical cord” of sorts, for all of their pneumatics components, solenoids, pressure switch input, and compressor output.
what are the boards sitting on top of the talon srx
Those appear to be the Talon SRX universal breakout boards.
I was told at our competition week 5, by an inspector, that the CAN chain should start at the RoboRIO and end at the PDP. I notice this set up has it terminating at one of the PCMs.
Was I misinformed, or is that a pretty good rule of thumb?
The CAN chain needs to start at the Rio (because the terminating resistor is in there and, to my knowledge, can’t be removed) and must end with a terminating 120 ohm resistor. The simplest method is to have it go into the PDB because by default there’s a jumper there that puts the resistor in place. But you can undo that jumper and add a resistor yourself.
Also, can you please fix that green wire on the right side coming out of the talons? Then take another picture and repost.
So close to perfection!
Just kidding, this looks great. But if you haven’t noticed that, you might attach a motor backwards and be mildly inconvenienced later.
So does the PCM also have this resistor built in, or would that need to be added to the other CAN terminals?
You would have to add it to my knowledge. [1]
[1] Though I don’t suggest it, you could PROBABLY run without it and be fine. But lemme emphasize, I REALLY don’t suggest it. As in, don’t do this. I’ve run it in testing with a VERY short bus (2 Talons and a CTRE Hero board) without major issues but in an FRC situation you probably want it.
So, if they’re terminating it somewhere else then, shouldn’t the jumper be switched to off on the PDP? Also, I don’t see how the second PCM on the left has only have one pair of wires going to it. Wouldn’t this need to go terminate? As in, a pair of wires goes in then they go out the the CAN central board and terminate?
Sure, and in this case it isn’t. I was answering a question on general wiring not this wiring. Sorry, I’m not going to trace CAN wires, I have far better things to do with my time.
https://www.chiefdelphi.com/media/photos/44252
beat you to it. Although I recommend the radio to be outside of the box 
Every couple years somebody posts a picture of a robot in box. It’s amazing how the control system has progressed over the years, especially it’s size.
I built a similar box as a summer project in 2013, it was very useful for debugging and prototyping. There was also a pneumatic system in an identical case.
https://www.chiefdelphi.com/media/photos/39173
2075’s Robot-In-A-Box from 2010(8 slot crio)
https://www.chiefdelphi.com/media/photos/35144
I remember seeing similar concepts with the old IFI control system but cant find any links now
https://www.chiefdelphi.com/media/photos/22846 Ask and you shall receive. And the previous iteration: https://www.chiefdelphi.com/forums/showthread.php?threadid=33253