Code following relay positions are?

Code following relay positions are?

• A. Energized on back, de-energized on front, no coding
• B. De-energized on front, energized on back, random coding
• C. Energized on back, de-energized on back, no coding
• D. De-energized on its back, energized on its back, energized on its front, capable of coding

Answer: (D)

Relays that use coding rely on assigning a distinct energization pattern to each physical position so you can identify which position the relay is in. In this case, the relay has three positions (two references to the back and one to the front), and each position is represented by a unique energization state: de-energized on the back for the first position, energized on the back for the second, and energized on the front for the third. The phrase “capable of coding” means the relay is designed to support this kind of distinct coding across its positions, which helps technicians verify and read the relay’s position reliably. Other options fail because they either show only two states with no way to distinguish all positions, suggest random or inconsistent coding, or claim there’s no coding capability when the device is designed to be coded.

Relays that use coding rely on assigning a distinct energization pattern to each physical position so you can identify which position the relay is in. In this case, the relay has three positions (two references to the back and one to the front), and each position is represented by a unique energization state: de-energized on the back for the first position, energized on the back for the second, and energized on the front for the third. The phrase “capable of coding” means the relay is designed to support this kind of distinct coding across its positions, which helps technicians verify and read the relay’s position reliably.

Other options fail because they either show only two states with no way to distinguish all positions, suggest random or inconsistent coding, or claim there’s no coding capability when the device is designed to be coded.