XIC stands for Examine If Closed. What is the typical contact type for XIC?

XIC stands for Examine If Closed. What is the typical contact type for XIC?

• A. Normally Open
• B. Normally Closed
• C. Both
• D. Neither

Answer: (A)

XIC stands for Examine If Closed, which means this contact passes current when the associated input is energized (true). In ladder logic, that behavior matches a normally open contact: it is open when the input is false and closes when the input becomes true, allowing the rung to energize the next element. So the typical contact type for an XIC is normally open. For contrast, an Examine If Open (XIO) is used for a normally closed contact, which conducts when the input is not energized.

XIC stands for Examine If Closed, which means this contact passes current when the associated input is energized (true). In ladder logic, that behavior matches a normally open contact: it is open when the input is false and closes when the input becomes true, allowing the rung to energize the next element. So the typical contact type for an XIC is normally open.

For contrast, an Examine If Open (XIO) is used for a normally closed contact, which conducts when the input is not energized.