Question

Circle or fill in the correct response. Unless otherwise noted, all answers will be worth 6 points: 1. A mushroom head push button on an emergency stop circuit typically uses N.O/N.C contacts 2. Multiple start buttons are connected in series/parallel in a motor control circuit 3. Multiple stop buttons are connected in series/parallel in a motor control circuit. 4. If a hardwired circuit required a second load to energize a set amount of time after turning the primary load on, it would use a(n) timer. 5. If a hardwired circuit required a second load to remain energized a set amount of time after turning timer. use a(n) off the primary load, it would several wires and use multiple Pushbutton contacts in a PLC controlled system? 6. Is it necessary to run 7. What is the difference between the timer timing (TT) and Done (DN) bit. 8. Two normally-closed pushbuttons connected in series create not/ nor / nand logic. 9. A single N.C. pushbutton creates on / or / not logic. 10. Two normally open push buttons create "or" logic when connected in series /parallel. 11. What is the primary safety feature of a three-wire control circuit that makes it a requirement in many installations?

Answer 1

Answer :- 1) Normally Connected (N.C)

Answer :- 2) Parallel, so that any one can start the motor.

Answer :- 3) Series, so that any one can stop the motor.

Answer :- 4) On delay timer

Answer :- 5) Off delay timer, it keeps line energized after the rung signal has gone false.

Answer :- 6)

Answer :- 7) TT bit comes ON and stays ON as long as timer is counting and goes OFF when counting is done.
DONE bit is ON only when counting is done.

Answer :- 8) NOR logic

Answer :- 9) NOT logic

Answer :- 10) Parallel