5volt not working on power distribution board

[kinganu123]

So we were trying to rig up our never before used axis camera from last year so we could take an attempt at tracking. We connected the wires to the 5v slot on the power distribution board from 2011. The problem we're having is the camera receives no power and the 5volt light on the power distribution board doesn't even light up. Our battery is fully charged and we double checked this via volt meter. Its a 12volt battery. the 12v and 24v slots on the PD board light up and everything that is supposed to be powered works fine and is effectively powered. We haven't made any recent changes to the electrical system.



Any insight on this is welcome and I believe I put in all the info I could think of

[BitTwiddler]

This happened to us last year. The lack of the light on the 5V tells the story.
I'm thinking the 5v regulator on your Power Distribution board is gone. Use your multimeter to measure the voltage on the camera terminals to verify this.

[kinganu123]

Originally Posted by BitTwiddler

This happened to us last year. The lack of the light on the 5V tells the story.
I'm thinking the 5v regulator on your Power Distribution board is gone. Use your multimeter to measure the voltage on the camera terminals to verify this.

Ok, what numbers would indicate that this is true? and our camera doesn't turn on either as an added detail.

[plnyyanks]

Originally Posted by kinganu123

Ok, what numbers would indicate that this is true? and our camera doesn't turn on either as an added detail.

Set your multimeter to read volts (20 max would work) and put the two probes into the two terminals on the 5V connector (red is negative, black is positive). If the multimeter shows 5V, then your PDB is okay. If not, you have a problem.

[kinganu123]

Originally Posted by plnyyanks

Set your multimeter to read volts (20 max would work) and put the two probes into the two terminals on the 5V connector (red is negative, black is positive). If the multimeter shows 5V, then your PDB is okay. If not, you have a problem.

Alright so since I'm not at our school right now I'll have to test this tommorrow but other than using a different PDB is there another fix if this is indeed the situation?

[plnyyanks]

Originally Posted by kinganu123

Alright so since I'm not at our school right now I'll have to test this tommorrow but other than using a different PDB is there another fix if this is indeed the situation?

This?

Originally Posted by apalrd

I had this issue on our mule vehicle, and just got 5v from the DSC's sensor power bus. I don't know the current source limit of the DSC's 5v bus, but it's enough to power one camera (with nothing else on 5v power). There is no rule prohibiting this arrangement, although it's sub optimal if you have a lot of sensors and stuff and overload the 5v bus.

This?

Or not use the 5V connector, providing everything else works and you're not breaking any rules in the process

[kinganu123]

Originally Posted by plnyyanks

This?


This?

Or not use the 5V connector, providing everything else works and you're not breaking any rules in the process

Looks right, and one of the seniors said that you need to plugin the axis camera to the 5volt so yeah

[plnyyanks]

Originally Posted by kinganu123

Looks right, and one of the seniors said that you need to plugin the axis camera to the 5volt so yeah

I don't think the camera is required to be in the regulated 5V terminal. Can you point to the rule that says so. The closest I can find is:

Originally Posted by R42

All electric power utilized by the Robot shall be distributed from the load terminals of the PD Board (not the M6 shanks).
The cRIO power input must be connected to the 24 Vdc supply terminals on the PD Board. With the exception of one Solenoid Breakout Board, no other electrical load can be connected to these terminals.
The wireless bridge power feed must be supplied by the 5V converter (model # TBJ12DK025Z) connected to the marked 12 Vdc supply terminals located at the end of the PD Board (i.e. the terminals located between the indicator LEDs, and not the main WAGO connectors along the sides of the PD Board). No other electrical load can be connected to these terminals (please reference any 2012 Robot Power Distribution Diagram posted on the Kit of Parts site for wireless bridge wiring information.
All other branch circuits must connect to, and have power sourced solely by, a protected 12 Vdc WAGO connector pair or the 5V supply on the PD Board.
Only one wire shall be connected to each WAGO connector on the PD Board. If multi-point distribution of circuit power is required (e.g. to provide power to the three KOP breakout boards via one 20-amp circuit), then all incoming wires must be appropriately spliced into the main lead, and only one lead inserted into the WAGO connector to connect the circuit.

and I don't see anything regarding the camera's power source. Now, it's highly recommended that you use the regulated power supply for the camera, since this will keep outputting 5 volts even as the battery fluctuates (which can't be said for the unregulated terminals). You can run the camera off of something else (as long as all applicable rules are satisfied and the camera gets the 5 V-DC that it needs), but you'll get better/more consistent results with the dedicated 5V supply.

Honestly, if your PDB is broken, the best thing to do is just buy a new one - it'll save you a lot of trouble in the long run.

[BitTwiddler]

Originally Posted by kinganu123

Alright so since I'm not at our school right now I'll have to test this tommorrow but other than using a different PDB is there another fix if this is indeed the situation?

If replacing the Power Distribution board doesn't resolve the problem then I would look at the possibility of a short either in the wiring to the camera or inside the camera itself. You can check this possibility by:
1. disconnecting power to the power distribution board
2. disconnecting the camera connector from the power distribution board
3. reconnecting power to the power distribution board
If after doing these steps, the 5V LED lights up then that would indicate the presence of a short somewhere.

[apalrd]

If you probe the voltage of the 5v supply on the PD board with a multimeter and it shows 0v, then the 5v supply is dead.

I had this issue on our mule vehicle, and just got 5v from the DSC's sensor power bus. I don't know the current source limit of the DSC's 5v bus, but it's enough to power one camera (with nothing else on 5v power). There is no rule prohibiting this arrangement, although it's sub optimal if you have a lot of sensors and stuff and overload the 5v bus.