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Old 07-05-2012, 10:57 AM
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Electrical disconnect

I'm looking for a wiring diagram for a RV style solonoid use to disconnect/connect power from battery using a flip switch. I now have a painless disconnect that will kill the battery if left in the on position a real pain in the butt. If I knew this was the way it worked I would have never have bought .Yes, i know they now make one that does what I was looking for orginally but, I'm not going to give them the satisfaction of buying from them again. Any help would be appreciated.
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Old 07-05-2012, 04:27 PM
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Not sure what you are asking.
What style solenoid do you now have?
There are (2) basic types of solenoids. a-Electrically maintained and b- mechanically maintained.
The electrically maintained type require a small amount of power to keep them operating. While the mechanically maintained only require a momentary pulse to energize and a pulse to deenergize. They are held in each position by a latching device.
The wiring requires a momentary switch like a SPDT center off momentary.

vicrod
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Old 07-05-2012, 06:06 PM
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Sure , I have a painless model 30204 electrical disconnect now wired into my car. It has a constant draw when energized even with the key in off position. I need to remember to always turn off or in a day or two you have dead battery. Running a optima red top and if you have ever had one dead it's a real project to get it to take a charge. I want to switch to a different type of solenoid that uses a momentary on, no power draw when on and a momentary off also no power draw. I've found the accompaning solenoid that are used by RV owners to keep there batterys from going dead when in storage. My concern is the wiring detail to install Thanks for your reply.
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Old 07-06-2012, 07:03 PM
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The attached schematic shows a latching type solenoid. Meaning it does not require any power to maintain it's ON or OFF position.
Control is done by a momentary switch which operates the ON and OFF coils.

vicrod
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krruzer (07-09-2012)
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Old 07-06-2012, 07:57 PM
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Hey Krruzer,

Sounds like a Watson's Street Works battery disconnect solenoid (#L27TM) might be exactly what you are looking for.

You can trigger it either with a push button or a SPST momentary toggle (or a wireless remote if you want to get fancy). The solenoid draws nothing whether is on or off, so it won't drain your battery. Similar to a latching relay, this is a bi-stable impulse relay. It has an internal ratchet mechanism that holds it on or off. Push the button once and it tuns on...push the button again and it turns off. I bet I've installed 20 of them in the past few years, and I've never had a problem with one yet. They are kind of pricey though.

I could post a wiring diagram for it if you're interested.

Hope this helps....
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Old 07-07-2012, 07:01 AM
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Thanks guys,I want to replace the painless model with the previous pictured solenoid (it's half the cost of hotronics,watson and painless) my concerns were the toggling of the momentary switch. I'm gatering that it reversed the latch with a momentary ground from a SPST switch?
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Old 07-07-2012, 10:09 AM
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I used a Cole-Hersee 24200 latching solenoid and wired it according to their suggested wiring diagram(no pilot light). I have a thread from several months ago about how I did it, but the schematic included that I drew afterwards was wrong so removed. The Cole-Hersee remote battery disconnect, shown in the attached is, in general, what I used: Special Solenoid Applications | Cole Hersee - Littelfuse

It works just fine and is mounted, except for the actuating SPDT switch along with the battery in the upholstered box you see in the header above or in the scroll of the battery bracket below
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krruzer (07-09-2012)
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Old 07-07-2012, 01:13 PM
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Quote:
Originally Posted by krruzer View Post
I want to replace the painless model with the previous pictured solenoid (it's half the cost of hotronics,watson and painless) my concerns were the toggling of the momentary switch. I'm gatering that it reversed the latch with a momentary ground from a SPST switch?
Sorry, I misunderstood.

The solenoid you have pictured above is an Intellitec model 01-00055-00.
The manufacturer's website doesn't offer any information about how to wire it. The best I could find is this description from Pacific RV Parts:

Quote:
Quote from:Pacific RV Parts

THE RELAY - How it Works
The Battery Disconnect Relay is a mechanically latching switch that operates by the momentary application of battery voltage to the coil terminals in one direction for latching (closed) or the other direction for unlatching (open).
To close the relay, +12 volts is applied to the ""I"" terminal and ground the ""S"" terminal of the relay. When this is done, the plunger is pulled into the coil and the contacts are connected. While this happens, the rod magnet suspended above the plunger is attracted (opposite poles attract) to the top of the plunger by the magnetic field.
When the voltage is removed from the coil, the plunger gets pushed upward by the return spring, but cannot move because the rod magnet is in the way.
To open the relay, +12 volts is applied to the ""S"" terminal and ground on the ""I"" terminal. When this is done, the plunger is again pulled into the coil. However, since the magnetic polarity of the coil is reversed, the rod is repelled (like poles oppose), and swings out of the way.
When the voltage is removed from the coil, the plunger gets pushed upwards by the return spring, breaking the connection between the two large terminals.
So the solenoid wires up basically the same as a GM style power window.
A SPST switch will not work with the Intellitec solenoid. To operate the solenoid with a single switch, you will need either a DPDT center off momentary switch, or a good old fashioned GM power window switch.



Hope this helps.....
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krruzer (07-09-2012)
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Old 07-21-2012, 09:04 AM
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follow up

Many times I follow a thread to find out how a problem is ultimately solved but, it ends with no real solution. My electrical disconnect question gave me some great advice.1st of all I was looking at the wrong solenoid to use for my particular application The orginal intellitec solenoid would have worked with some additional wiring for the switch. The suggestion to look at the Cole Hersee model #24200 was the answer. I did have to find the momentary switch which turned out to be a Carling technologies part #6fA54-73XG. I found it at Granger there part #4X200. It is a spring back momentary toggle SPST. So in wrapping it up, I want to thank all for the great feed back and direction.
George
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