---
title: PTO REPLACEMENT JUNCTION



# PTO Replacement Junction

## Requirements

*  Must receive PTO MCIL5F 
*  Convert 300VDC to 48VDC
*  Pass CAN bus
*  Mount on top of buoy &
*  Be watertight

## Design

This is a polycarbonate box with the necessary DC/DC converter for
supplying power to the top of the EM cable and passing 3-wire CAN as well.The unit will have the same bulkhead as the PTO and a dorn gland for a whip that will plug into a MC style bulkhead on the top of the EMCABLE.

The bulkhead on the top of the EM cable will match pinout with the
bulkhead already wired at the bottom. 

The DC/DC in the box will be the same DC/DC and carrier board as used in the Spring Controller electronics. MBARI has spares, but a board build must be ordered, lead time 1-2 weeks. 

All other parts are in stock if a potted splice acceptable 2' above the connection to the top of the EM Cable. If not, a cable at the appropriate distance can be made for the same cost, but has a 4-6 week lead time. 

## Design Files

| File Name | Information | 
|:---       |:---         |
| [PowerBuoy\_10\_PTO Replacement.pdf](./PowerBuoy_10_PTO Replacement.pdf) | Schematic | 
| [PTO\_ReplacementJunction\_BOM.pdf](./PTO_ReplacementJunction_BOM.pdf) | Bill of Materials | 
| [Subpanel\_Layout.pdf](./Subpanel_Layout.pdf) | 1:1 Scaled subpanel layout sketch | 
| [6x6x3-Impact.pdf](./6x6x3-Impact.pdf) | Datasheet for the enclosure | 
| [6x6x3-Hinged.pdf](./6x6x3-Hinged.pdf) | Mechanical drawing of the enclosure | 



## Changelog 

| Date          | Notes |
|:---           |:---   | 
| 2017-06-01    | Initial Design | 
| 2017-06-02    | Budget updated after receiving quotes|