Today modified the Aux boiler feed water pumps control box by PLC module.
The original box was composed by 6 pcs contactors & 2 pcs timer delay, but the dwg was not reasonable via one of the pumps stops, the timer delay still works.so the feed pump has to stop after 20 seconds later.
here’s the original mess
We used 1 PLC to replace all the contactors.
How did I compose the text? I will post it a while later 🙂
And tested in order after completion and operation qualified and stable.
Does the Control Box look tidy?