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Article: Method provides automatic machine shutdown.(design ideas)
- Article from:
- EDN
- Article date:
- May 27, 2004
- Author:
CopyrightCOPYRIGHT 2004 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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SOME MACHINES need to run for long periods and therefore may finish their work in the middle of the night or during the weekend. For the time remaining, until the operator returns, the machines stay idle, uselessly consuming power. This Design Idea allows a machine to completely shut itself down after finishing its work. In addition, the method allows for informing the machine operator by phone. You insert the circuit into the area that Figure 1 indicates as a dashed line into the main supply line of the machine. The relay, [K.sub.STOP], connects to a free output of the programmable controller of the machine. You must program the controller in such a way that relay ...