Two answers are correct. t diagram and the pneumatic circuit diagram of a contro
ID: 3197863 • Letter: T
Question
Two answers are correct. t diagram and the pneumatic circuit diagram of a control system are shown below. Which statements about the mode of operation are correct? The push button S1 acts directly on the coil 1Y1 of the double solenoid valve The prerequisite for the return movement is that first pushbutton S1 must have been released. When the advancing piston rod reaches the forward end position, the solenoid coil 1Y2 is actuated via limit switch 1S2 and the piston rod retracts. If the pushbutton is released during the advancing movement, the piston rod is retracted without having reached the forward end position The relay K1 with latching function is to be used for signal storage. 1A 1S2 2 +24V 12K1 K2 1V 4 2 1Y2Explanation / Answer
The correct options are B and E.
B is correct since if S1 is not released prior to retraction then both the solenoid will be active and the valve will not shift to left and no return movement.
E is correct since with latching we have to just press S1 and it will store the signal.
A is not correct since S1 acts on 1Y1 through relay and not directly.
C is not correct since S1 needs to be released first.
D is not correct since If the pushbutton is released in between , the piston will not retract back will be on its position as it is.
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