Question

When connected to a programmable controller, the actual wiring of a switch’s contacts (limits, floats, push buttons, etc.) requires that one switch be connected to a dedicated controller input terminal. The other switch terminal is to be connected to ___ terminal on the controller.

a. The V-in or VAC output
b. the VDC or C input
c. another dedicated input

Answer 1

In connecting a switch to a programmable controller, one switch terminal connects to a dedicated input, while the other should be connected to the common (C) or ground terminal.

Step-by-step explanation:

When connecting a switch's contacts to a programmable controller, typically one terminal of the switch is connected to a dedicated input on the controller, to ensure that the signal from that switch does not interfere with other signals.

The other terminal of the switch should be connected to a common reference point, which is usually the ground or common (C) terminal. This provides a return path for the electrical current.

Thus, the correct answer is: the other switch terminal is to be connected to the common (C) or ground terminal on the controller.