automatic charging relay

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coolen

Copper - Posts: 121

Joined: October 27, 2008

Location: Nova Scotia, Canada

Posted: March 31, 2010 at 4:20 PM / IP Logged

I just got one of these: http://bluesea.com/category/2/productline/overview/387

it has a feature that when it sees 12v on the starter inturrupt input it isolates the batteries. My question is, if I took a switch and ran the wire to that Starter Inturrupt terminal, with the switch on would it keep my batteries isolated? Or is this just a bad idea??

Thanks

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: March 31, 2010 at 6:29 PM / IP Logged

Which terminal are you talking about?

On the heavy side, one is connected to battery +12V, the other is only +12V when the voltage exceeds whatever voltage. (It is normally open - ie, only closed when above whatever voltage.)

I assume the light terminals are GND, and its sense & supply from batt+12V.

If you break either, the relay will open.

Alternative set ups include a relay controlled by the ACC position (off whilst cranking); the alternator-regulator's charge lamp circuit (ie, parallel the batteries or connect the load only whilst charging), or having a low-voltage cutout (MW728) control a relay.

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coolen

Copper - Posts: 121

Joined: October 27, 2008

Location: Nova Scotia, Canada

Posted: April 01, 2010 at 5:27 AM / IP Logged

so my idea would work then

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: April 07, 2010 at 6:35 AM / IP Logged

If it's in accordance with what I said, then yes.

Otherwise....

oldspark wrote:

Which terminal are you talking about?

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automatic charging relay

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