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-   -   Power Distribution Board (http://www.chiefdelphi.com/forums/showthread.php?t=134041)

RoboBucs 06-02-2015 00:48
Re: Power Distribution Board
 
Quote:
Originally Posted by ozrien (Post 1438979)
You're not getting 12V at both P1 and P2? Is the meter's ground probe connected directly to battery's ground (step3)? Please be as specific as possible.
Yes, I did all the steps just as it says and I didn't get any voltage reading anywhere on the bad ports, but when i tried the exact same thing on the good ports, I got voltage readings at all points. It isn't the breaker because I've tried switching the breaker to other ports that work at it works.

GeeTwo 06-02-2015 01:00
Re: Power Distribution Board
 
Quote:
Originally Posted by RoboBucs (Post 1438965)
Concerning the black and red switched wires, some of our guys had to solder the wires and they soldered the red to the ground port and the black to the positive port because it wasn't labeled on the camera they were soldering it to, so the red is actually the ground and the black is the positive.
Be sure to remedy this before competition:
Quote:
Originally Posted by 2015 Game Manual
R40
All non-SIGNAL LEVEL wiring with a constant polarity (i.e., except for outputs of relay modules, motor controllers, or sensors) shall be color-coded along their entire length (from the manufacturer) as follows:
A. Red, yellow, white, brown, or black-with-stripe on the positive (e.g. +24VDC, +12VDC, +5VDC, etc.) connections
B. Black or blue for the common or negative side (-) of the connections.
Wires that are originally attached to legal devices are considered part of the device and by default legal. Such wires are exempt from R40.

philso 06-02-2015 01:26
Re: Power Distribution Board
 
Quote:
Originally Posted by RoboBucs (Post 1438919)
We had breakers in all of the slots so I know there was one there. This problem just recently occurred, it has had a motor controller hooked up to it all season and we recently took them all out. The wires may have been shorted when we took them out, would that have to do with it?
In the future, please open the main breaker and disconnect your battery before doing any work on your wiring.

You may also want to find out if there are some established teams in your area who can help your team climb the learning curve. You will enjoy the experience much more.

RoboBucs 06-02-2015 15:32
Re: Power Distribution Board
 
Are the motor controllers able to run off of the 30 Amp ports? If so then I won't need the ones that aren't working

Jon Stratis 06-02-2015 16:51
Re: Power Distribution Board
 
Quote:
Originally Posted by RoboBucs (Post 1438965)
Concerning the black and red switched wires, some of our guys had to solder the wires and they soldered the red to the ground port and the black to the positive port because it wasn't labeled on the camera they were soldering it to, so the red is actually the ground and the black is the positive.
Quick note on this... You need to get those wires removed and attached correctly. R40 specifies the correct color coding for all non-signal constant polarity wires, which includes those. If you don't fix it before you nah, your inspector will make you fix it at your event.

Al Skierkiewicz 07-02-2015 08:29
Re: Power Distribution Board
 
Buc,
It is possible, but highly unlikely, that you could have damaged the PDP for one or two outputs. We have found on multiple PDPs, that the terminals for the breakers do not line up with the slots in the PDP cover. If this breaker is easier to insert and remove than the other slots, you are likely missing the terminals inside the PDP. At least one of our PDPs is going back because we can't even see the terminals through the slots.
Yes motor controllers can be run from 30 amp breakers and even 20 amp breakers if you are so inclined. However, the breaker is not a current limiter. I have seen some teams use them as such. A CIM motor will still draw 131 amps in stall even if connected through a 20 amp breaker. (For a short period of time.)
One phrase we have used every year...
If you had time enough to do it again, you had time enough to do it right the first time.
Living with color mis-match on power wiring is an accident waiting for a place to happen.


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