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http://www.relayandcontrol.com/
A control relay is the electromechanical equivalent of a thyristor. Control relays have only two possible operating states: ON or OFF. A control relay is essentially a switch that ... http://en.wikipedia.org/wiki/Control_relayWorld's Largest Manufacturer of Computer Controlled Switching Devices Since 1995. National Control Devices, LLC PO Box 455 ? Osceola ? MO ? 64776 http://www.relaycontrollers.com/A relay is an electrical switch that opens and closes under the control of another electrical circuit. In the original form, the switch is operated by an electromagnet to open or ... http://en.wikipedia.org/wiki/RelayThe question of how to connect and control a relay from the parallel port came up recently from a user of TurboCNC via email. Here's how you can do it, even if you don't know a ... http://www.dakeng.com/relay.htm |
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