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Subject: Re: how would you interperet this?

Date: 04/04/00 at 10:12 PM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: how would you interperet this? posted by Ermilio on 04/04/00 at 5:10 PM:

Hi, Ermilio.

I just e-mailed a bitmap file to you with my own sketch of what I think you are illustrating. I think the following is happening.

When you first apply the +12 VDC, both relays RY1 and RY2 remain de-energized. Nothing happens.

If somehow you force the normally-open contacts of RY1 to close, the coil of RY1 becomes energized and RY1 remains latched in its energized position. Power is applied to the motor and the LED lights up.

If next, you somehow force the normally open contact of RY2 to close, power is removed from RY1, the motor and the LED and RY1 falls back to its de-energized state. At the same time, the coil of RY2 becomes energized and RY2 gets latched in its own energized state.

If you next remove the +12 VDC, then RY2 drops out and you're back where you started.

How you would make RY1 or RY2 go to closure of their respecitve normally-open contacts isn't clear.

Is this helpful??

Good luck.

John Dunn - President
Ambertec, Inc.
ambertec@ieee.org


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