9 Components of a PLC sequence control system Quiz

What is the purpose of bringing parts of a sequence control system together in workcells in industry?

• To increase the number of tasks

• To reduce costs and increase effectiveness

• To complicate the process

• To separate tasks into different areas

How does a PLC unit interact with actuators?

• It sends signals based on data received

• It directly powers the actuators

• It stores actuator settings

• It physically connects to the actuators

What is the primary role of a sensor in a PLC system?

• To provide the PLC with information

• To control the PLC directly

• To power the PLC

• To store data in the PLC

What is one function of an actuator?

• Starting an electric motor to power a conveyor belt

• Cooling down a motor

• Measuring temperature

• Storing electrical energy

Which of the following actions is NOT performed by an actuator according to the document?

• Switching electrical power to illuminate a lamp

• Opening a valve to supply compressed air

• Calculating data for a PLC

• Starting an electric motor

What is one characteristic of the PLC in relation to the workcell?

• The PLC operates at higher voltages than the inputs and outputs.

• The PLC is electrically connected to the workcell.

• The PLC operates at lower voltages than many of the inputs and outputs.

• The PLC is not isolated from the workcell.

What is the role of the opto-coupler in the PLC input sequence?

• It directly powers the PLC with a +24 V signal.

• It isolates delicate PLC circuits from the higher voltage of the workcell.

• It amplifies the +24 V signal to a +48 V signal.

• It converts the +5 V signal to a +24 V signal.

What voltage signal does the opto-coupler produce for the PLC input?

• +24 V

• +12 V

• +5 V

• +48 V

What voltage signal does the PLC send to the relay to energize it?

• +5 V

• +12 V

• +24 V

• +3 V

What happens when the relay is energized in the PLC system?

• The circuit is broken.

• The contacts close.

• The motor stops.

• The voltage decreases.