What is assigned to each wire in a control circuit when using a terminal strip?

In a control circuit utilizing a terminal strip, each wire is assigned a reference point. This reference point is crucial as it helps identify where each wire is connected and what role it plays in the circuit configuration. By establishing a reference point for each wire, technicians and engineers can easily troubleshoot, maintain, and ensure the proper functioning of control systems.

Having a reference point associated with each wire facilitates quick identification of connections during installation and repair work, leading to improved efficiency and reduced errors. This is especially important in complex circuits where multiple wires converge, as it allows for better mapping and continuity checks.

In contrast, the other options relate to different aspects of circuit design and operation. While a reference voltage may define signal levels, it does not specify connection points. A control module refers to a more comprehensive component that often encompasses various functions within the control system, rather than individual wire assignments. A function label may describe the purpose of a wire but does not serve as a point of reference like the terminal strip does.