reverse voltage for boat

Home / the12volt's Install Bay / Marine Electronics / reverse voltage for boat (

Topic Closed)

Welcome Guest :)

Members

Next Page > < Prev Topic Next Topic >

nathan909

Member - Posts: 12

Joined: September 29, 2004

Posted: June 29, 2007 at 4:18 PM / IP Logged

Ok, I have a boat... On it there is a hatch that is motor driven. This motor works off of 2 wires (reverse polarity for down). The system works fine but slow... The voltages runs up to a switch and then back to the motor, about 18'.

The battery is right next to the motor. I would like to add a relay or two, grabbing fused power from the battery 6" away and use that to power the motor. The relays would need to be switch using 2 wires (with reverse polarity for down).

In a nut shell i just want to reproduce the same voltage at the back of the boat, 2 wire, normal polarity or reversed polarity.

Thanks for your help.

-Nathan

KarTuneMan

Platinum - Posts: 7,056

This member has made a donation to the12volt.com. Click here for more info.

This member consistently provides reliable information

Joined: December 14, 2004

Location: Isle Of Man

Posted: June 29, 2007 at 5:45 PM / IP Logged

I'm confused.... but look here.

https://www.the12volt.com/relays/relays.asp

nathan909

Member - Posts: 12

Joined: September 29, 2004

Posted: June 29, 2007 at 6:45 PM / IP Logged

I have 2 wires with both reg and rev polarity...

I would like to run a higher amp by using relays.

How can i get a relay(s) to supply a motor with both reg and rev polarity.

The Trigger for the relay is 2 wires... sending both reg and rev polarity.

dualsport

Silver - Posts: 983

Joined: September 27, 2005

Location: United States

Posted: June 29, 2007 at 8:55 PM / IP Logged

Start with this

Start with Hotwaterwizard's diagram, supplying the key switch input with one side of your two wires (pick whichever one gives you the right polarity on the output.)

Then add another relay to break the 12V input, with the coil connected to your two wires, so that it only closes when you have either a reg or rev polarity signal going in (make sure your relay doesn't have any built in suppression diodes, since it needs to work with both directions.

hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: June 30, 2007 at 12:23 AM / IP Logged

reverse voltage for boat -- posted image.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: June 30, 2007 at 12:32 AM / IP Logged

The circuit Above will only work if there are Limit switches built into the Actuators.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: June 30, 2007 at 12:42 AM / IP Logged

Here is a circuit that you can use push button switches and 3 wires.

This one will work with motors that do not have limit switches.

reverse voltage for boat -- posted image.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

dualsport

Silver - Posts: 983

Joined: September 27, 2005

Location: United States

Posted: June 30, 2007 at 9:11 AM / IP Logged

reverse voltage for boat -- posted image.

This is what I had in mind, using the two existing wires for controlling the relays.

hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: June 30, 2007 at 11:48 AM / IP Logged

Oh just cut the power to the circuit to stop the motor but how do you make the switch from open to close with this setup?

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

dualsport

Silver - Posts: 983

Joined: September 27, 2005

Location: United States

Posted: June 30, 2007 at 12:31 PM / IP Logged

The two wires he already has running to the motor are reversing polarity wires. During the off condition, there's no voltage on any of the wires, all the relays are deenergized, and nothing is powered up. He just needs a boost in power using relays, because there's currently a big drop from the long length of wires he's running.

The Input (+) and Input (-) become inverted when he closes the hatch, and result in the two relays going into the reverse polarity configuration.

Standby: Input(+) = 0V, Input(-) = 0V Relays off, no power to motor
Open Hatch: Input(+) = 12V, Input(-) = GND Polarity configuration relays ON, 12V power relay ON, Positive polarity power to motor
Close Hatch: Input(+) = GND, Input(-) = 12V Polarity configuration relays OFF, 12V power relay ON, Negative polarity power to motor

Next Page >

Printable version

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

Search the12volt.com

Follow the12volt.com

Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.