Question

WILD rade on your test. must 1. The relay contact shown below is designed to operate so that a. when the relay coil is energized, there is a time delay in closing b. when the relay coil is energized, there is a time delay in opening c. when the relay coil is de energized, there is a time delay in closing d. when the relay coll is de energized, there is a time delay in opening 2. In the relay diagram shown below, explain what happens to the output light "ul' when: a) switch S1 is open, b) switch $1 is closed, c) Switch S1 reopens. 3. The output of a PLC counter is switch from off to "on" any time the counter input rung is "true" True False 4. PLC up-counter normally counts true-to-false transitions. a) True b) False 5. When the accumulated count of a counter is equal to or greater than the preset count, which bit will be true? 6. A. . scan time .....contact is designed to generate an output pulse when it triggers and goes off after one

Answer 1

WILD rade on your test. must 1. The relay contact shown below is designed to operate so that when the relay coil is energized, there is a time delay in closing b. when the relay coil is energized, there is a time delay in opening c. when the relay coil is de energized, there is a time delay in closing d. when the relay coll is de energized, there is a time delay in opening 2. In the relay diagram shown below, explain what happens to the output light "ul' when: a) switch S1 is open, b) switch $1 is closed, c) Switch S1 reopens. 3. The output of a PLC counter is switch from off to "on" any time the counter input rung is "true" True False 4. PLC up-counter normally counts true-to-false transitions. a) True b) False 5. When the accumulated count of a counter is equal to or greater than the preset count, which bit will be true? Done Bit will be true 6. A.... ....contact is designed to generate an output pulse when it triggers and goes off after one scan time Trigger input

(2) From Relay Diagram, • Switch S1 is open, O TD de-energized, o TD1 closed, o Light Li is on. Switch S1 is close, o TD energizes, o Timing period starts, o TD1 is still closed, o Light L1 is still on. Switch S1 is reopen, o TD de-energizes, o TD1 closes instantly, o Light L1 is switched on.