Hi all
I'm designing a circuit for a system that takes I/P frm the user through a button...button s scanned by ucontroller...Then it has to switch ON/OFF an outer system that is operating on 28VDC. The properties of the ON/OF signal are
1. ground for switching ON & Open for switching OFF the system(Confusing)
Controller energizes the relay to generate this signal.
2. The relays should b working in such a way that if the power fails,the state of the signal that is going to the outer sytem should not change....
The problem is what kind of relays I should be using....and how to meet the two conditions
I'm designing a circuit for a system that takes I/P frm the user through a button...button s scanned by ucontroller...Then it has to switch ON/OFF an outer system that is operating on 28VDC. The properties of the ON/OF signal are
1. ground for switching ON & Open for switching OFF the system(Confusing)
Controller energizes the relay to generate this signal.
2. The relays should b working in such a way that if the power fails,the state of the signal that is going to the outer sytem should not change....
The problem is what kind of relays I should be using....and how to meet the two conditions