Module A Flashcards
(17 cards)
If you needed to explain the overall function of a system without worrying about specific wiring details, what type of drawing would you use?
A Block Diagram – it shows the big picture of how components relate conceptually, not physically.
Which drawing shows the actual locations of components and how they’re wired together in real life?
A Wiring Diagram – it focuses on the physical placement and direct wire connections between devices.
You’re troubleshooting a motor control circuit and want to understand the sequence of operations—what drawing helps most?
A Schematic Diagram – it reveals the logic and function of a circuit, not the physical layout.
You’re installing cables between multiple control panels and need to know which wire goes to which terminal—what drawing should you use?
An Interconnection Diagram – it shows specific terminal connections and cable details across different components.
What’s the key difference between a schematic and a wiring diagram?
Schematic = Shows how the circuit works (logic/function)
• Wiring = Shows where things are and how they’re connected physically
Which type of drawing is best for communicating a general system overview to a new technician?
A Block Diagram – it gives a simplified visual of how parts relate without overwhelming detail.
Which type of drawing helps you wire equipment exactly as it will be installed on-site?
Wiring Diagram – it includes the physical layout and conductor routing needed for accurate installation.
Which drawing type helps you trace control logic for troubleshooting or programming PLCs?
Schematic Diagram – it lays out the control path and functional logic used in automation systems.
What are schematic diagrams sometimes called?
Elementary diagrams – because they focus on basic function and sequence of operation.
Which type of drawing is sometimes called a “connection diagram” or “termination diagram”?
Interconnection diagram – also known as connection, termination, or pin-out diagrams depending on context.
If you hear someone mention a “functional diagram,” which type are they likely referring to?
A Schematic diagram – it focuses on function and logical operation of components.
When a technician mentions a “layout diagram,” which type of drawing are they most likely describing?
A Wiring diagram – since it shows the physical placement of components and wire routing.
How do contacts in the stop circuit affect the control circuit?
Contacts in the stop circuit affect both starting and stopping the motor. Breaking this path (e.g., hitting the stop button) kills power to the coil and shuts down the motor, regardless of the start signal.
What happens when an NC contact in the stop circuit opens?
It interrupts the control path and de-energizes the contactor coil, stopping the motor.
What is the purpose of the holding contact in a start/stop circuit?
It keeps the control circuit latched after the start button is released. Without it, the motor would stop as soon as you let go of the start button.
What happens to the motor if an overload contact (NC) opens in the control circuit?
The motor de-energizes—just like hitting the stop button—protecting the system from damage.
