Which statement best describes how open wire detection is implemented and what happens when an open wire condition is sensed?

• A. A fuse placed in series; the controller logs a fault.
• B. A leakage resistor (15 kΩ) placed across the input contacts; if open wire is sensed, a point-level fault is sent to the controller.
• C. A bypass capacitor across the input; notification is via LED only.
• D. No hardware approach; detection is software.

Answer: (B)