Distinguish between analog sensor signals and digital (discrete) sensor signals and how logic handles them.

• A. Analog signals are binary; digital signals vary continuously.
• B. Analog signals vary continuously and may require conditioning or ADCs; digital signals are on/off and map directly to logic inputs after conditioning.
• C. Both analog and digital signals require no conditioning for PLC inputs.
• D. Digital signals cannot be read by logic.

Answer: (B)