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| 4/14/2018 2:24 PM | |
Joined: 11/11/2017 Last visit: 1/7/2025 Posts: 190 Rating:
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can someone take a look at this circuit for me please and show me how i can achieve what i need. the 2 inputs 1 & 2 are pressure switches that are attached to 2 fans and i need to prove they are open before the fans start at the moment my circuit does prove they are open but start the fan after the pressure switches are made, i need the fan to start because the pressure switches are going to be operating something else in the program. hope that makes sense thanks AttachmentCircuit Diagram1.zip (120 Downloads) |
| 4/14/2018 3:25 PM | |
Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating:
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Look if you like this example. When the fans are switched on, the respective pressure switch must be open. The fans start up and a bridging time of 3 seconds is started. If the 3 seconds have elapsed and the fans have not built up pressure, the fans would be switched off again. AttachmentFan_controlling_FS4.zip (119 Downloads) |
| 4/14/2018 4:14 PM | |
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Joined: 11/11/2017 Last visit: 1/7/2025 Posts: 190 Rating:
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this kind of works but when one of the pressure switches closes it only operates one fan and turns the other one off |
| 4/14/2018 5:48 PM | |
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Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating:
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Like this?
AttachmentFan_controlling_FS4_V2.zip (108 Downloads) |
| 4/14/2018 6:07 PM | |
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Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating:
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So delete Q2 and all is good... |
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