Modular I/O systems consist of divided compartments into which separate models can be plugged. This design feature

• A. Greatly reduces flexibility
• B. Has no effect on flexibility
• C. Greatly increases flexibility
• D. Prevents compatibility with other models

Answer: (C)

Modularity in I/O systems is what makes them flexible. With divided compartments that accept separate plug-in models, you can tailor the I/O setup to the exact needs of a application, swap modules as requirements change, and expand or reconfigure without rebuilding the entire system. You gain the ability to add more digital inputs or outputs, swap in specialized analog or sensor modules, or handle different voltage or signal types just by inserting the appropriate module. The modules share a common backplane and standardized interfaces, so upgrades and maintenance can be done quickly with minimal downtime and reusable parts. In short, this design greatly increases flexibility because it lets the system evolve with your needs without replacing the whole unit.