Hey guys,
I humbly ask for your help. Its been a long time since i've designed circuits as my profession changed to PLC based controls. So i'm kind of stumped as to how to accomplish my small project.
Currently i'm using a 24v micrologix PLC to activate a solenoid. Using a PLC is what i know, so it was relatively simple and effective. I'm looking to perfect it to keep the system simple. An expensive PLC adds bulk and is expensive to replace if it gets damaged.
The ultimate goal is to use a 12v DC power source to activate a 12v relay which the N.O. contacts will be used to drive a 12v solenoid.
Functional Description:
A rocker switch (S1) is used to "set" the system. If this switch is not closed, the system will not operate. S1 has both a N.O. and a N.C. terminal. I've referred to it below using the N.O. Terminal.
On power up once S1 has closed, the system is ready to energize the relay. A momentary switch(S2) will close the relay.
Once S2 has been closed, the relay will stay energized for an adjustable 0-X seconds and then re open.
Once the relay has been energized, opening and closing S2 again has no effect on the circuit.
Once the relay has been energized and reopened it cannot be energized again until S1 has been opened and closed and after an adjustable time of 0 - 30 minutes. After the 30 minutes, closing S2 will energize the relay.
Disconnecting the power will reset the circuit.
I've looked at a few 555 timer circuits and i just dont have the know how anymore to modify it to meet my functional requirements.
Any help would be greatly appreciated. If more input from me is needed, i will most definately try my best to answer your questions.
Thank you for your time,
Marshall
I humbly ask for your help. Its been a long time since i've designed circuits as my profession changed to PLC based controls. So i'm kind of stumped as to how to accomplish my small project.
Currently i'm using a 24v micrologix PLC to activate a solenoid. Using a PLC is what i know, so it was relatively simple and effective. I'm looking to perfect it to keep the system simple. An expensive PLC adds bulk and is expensive to replace if it gets damaged.
The ultimate goal is to use a 12v DC power source to activate a 12v relay which the N.O. contacts will be used to drive a 12v solenoid.
Functional Description:
A rocker switch (S1) is used to "set" the system. If this switch is not closed, the system will not operate. S1 has both a N.O. and a N.C. terminal. I've referred to it below using the N.O. Terminal.
On power up once S1 has closed, the system is ready to energize the relay. A momentary switch(S2) will close the relay.
Once S2 has been closed, the relay will stay energized for an adjustable 0-X seconds and then re open.
Once the relay has been energized, opening and closing S2 again has no effect on the circuit.
Once the relay has been energized and reopened it cannot be energized again until S1 has been opened and closed and after an adjustable time of 0 - 30 minutes. After the 30 minutes, closing S2 will energize the relay.
Disconnecting the power will reset the circuit.
I've looked at a few 555 timer circuits and i just dont have the know how anymore to modify it to meet my functional requirements.
Any help would be greatly appreciated. If more input from me is needed, i will most definately try my best to answer your questions.
Thank you for your time,
Marshall
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