Which of the following is not typically found in a function block diagram?

In a function block diagram, the primary goal is to represent the functions and operations of different components in a logical manner. Timers, counters, and logic blocks are integral parts of such diagrams.

Timers are essential for controlling operations over a specified duration, frequently used in automation for time-related functions. Counters are used for counting occurrences of events, enabling the tracking of inputs or operations in a process. Logic blocks form the foundation for decision-making in control systems, processing inputs and determining outputs based on logical conditions.

Switches, while important in many electrical circuits and control systems, are typically not represented in function block diagrams. This is because switches often serve more as physical interfaces or control points rather than functional components that manipulate data flow or perform calculations within the system's logic. Function block diagrams focus on the functionality of the system rather than detailing every hardware component or control element, which is why switches are generally excluded from these diagrams.