What is This?

[captain ron]

What is this? Do I need it? Or do any of you need it? What's it worth? Bla bla bla!

Class1 Electrical System Manager with display p/n 105228  It's brand new and don't want to put it on ebay till I find out what it is and if I can use it

[Nick Badame Refrig/ACC]

Hi Ron,

Need more info..

How about a pic. and a brand name.

Nick-

[captain ron]

Here's the link to it

http://www.class1.com/products4.asp?productid=76

[captain ron]

I can't believe with all of this electrical knowledge on here somebody hasn't been able to tell me anything about this 

[Nusa]

You provided the link to the info, including the manual: http://www.class1.com/products/manuals/ESM_Manual.pdf

Seems pretty comprehensive.

[DrivingMissLazy]

Sure seems like a pretty neat device. I am surprised that nobody seems to have heard of it before.
Richard

[oldmansax]

Ron:

It is an electrical load manager. Class 1 makes a lot of those, mainly for the emergency vehicles industry. We have that setup on one fire engine and one ambulance at our fire station. Besides a giving a digital readout, all or some of the electrical loads are controlled thru the device. Depending on how the operator sets it up, the monitor can either engage the fast idle option or "shed" some of the load in a low voltage situation.

Example: Fireman (engineer) arrives on scene and leaves engine at idle with all emergency lights and head and running lights on. Battery is quickly discharged due to large load & alternator not turning enough to keep up.  If pump is not engaged (we don't want nozzle pressure to go from 50# to 175# with no warning!), manager will engage fast idle to charge battery. If pump is engaged, manager will "shed" (turn off) some of the load starting with least needed (from pre-programmed list, usually 1 set of strobes) to critical (usually headlights). It will also engage audible and/or visual warning.

They are pretty common on later model emergency equipment.

As far as your use is concerned, the device is 12 volt. If you have a 12 volt coach system it will work, although I am not sure you would want the features it provides. Personally, I like manual controls.

TOM

[buswarrior]

Yup, similiar system installed on the accessible transit ELF Ford van chassis cut-aways here in Toronto.

Drivers don't seem to understand about fast idle and AC use in summer....

Great device to let the machine protect itself from less than knowledgable or disciplined workers.

For a busnut, an interesting project, if you are so inclined.
But if you are smart enough to make it work, you're smart enough to do what it does by yourself!

happy coaching!
buswarrior