Compare pneumatic and electronic control signals and list typical advantages of each.

Compare pneumatic and electronic control signals and list typical advantages of each.

• A. Pneumatic signals (typically 3-15 psi or 0-20 psi) are robust in hazardous environments and can drive actuators directly; electronic signals (4-20 mA, 0-10 V) are easier to interface with digital controllers, offer higher precision, and simplify diagnostics.
• B. Pneumatic signals are always cheaper and always more precise than electronic signals.
• C. Electronic signals cannot be used in hazardous environments.
• D. Pneumatic signals require digital converters.

Answer: (A)

Pneumatic signals are valuable where rugged, direct actuation is needed and electrical sparks must be avoided. Compressed air can power cylinders and valves reliably in harsh environments, and the signals are simple pressure ranges (like 3-15 psi or 0-20 psi) that are hard to interrupt by EMI, making them inherently robust in hazardous or dirty settings.Electronic signals, on the other hand, exist in the electrical domain, which makes it easy to interface with digital controllers, run precise positioning and measurement, and implement software-based control and diagnostics. Current loops such as 4-20 mA or voltage signals like 0-10 V provide higher resolution and repeatability, along with straightforward monitoring, status checks, and data logging. In short, pneumatics lean toward robustness and direct actuation in tough environments, while electronics lean toward precision, rich interfacing, and easier diagnostics. The other statements don’t fit these realities: pneumatics aren’t inherently cheaper or more precise in all cases, electronic signals can be used in hazardous environments with proper design, and pneumatics don’t require digital converters to function.

Pneumatic signals are valuable where rugged, direct actuation is needed and electrical sparks must be avoided. Compressed air can power cylinders and valves reliably in harsh environments, and the signals are simple pressure ranges (like 3-15 psi or 0-20 psi) that are hard to interrupt by EMI, making them inherently robust in hazardous or dirty settings.Electronic signals, on the other hand, exist in the electrical domain, which makes it easy to interface with digital controllers, run precise positioning and measurement, and implement software-based control and diagnostics. Current loops such as 4-20 mA or voltage signals like 0-10 V provide higher resolution and repeatability, along with straightforward monitoring, status checks, and data logging. In short, pneumatics lean toward robustness and direct actuation in tough environments, while electronics lean toward precision, rich interfacing, and easier diagnostics. The other statements don’t fit these realities: pneumatics aren’t inherently cheaper or more precise in all cases, electronic signals can be used in hazardous environments with proper design, and pneumatics don’t require digital converters to function.