In a ladder diagram, a coil is a representation of what type of device?

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Multiple Choice

In a ladder diagram, a coil is a representation of what type of device?

In ladder logic, the coil at the end of a rung represents an output device. When the rung’s conditions are true, the coil is energized, indicating that the associated actuator should operate—think of a lamp, motor, valve, or solenoid, or even an internal relay used to drive other outputs. Inputs are shown as contacts that sense sensors or switches, not as coils. The power supply provides the voltage, but the coil itself is the device being activated, which is why it’s categorized as an output.

In ladder logic, the coil at the end of a rung represents an output device. When the rung’s conditions are true, the coil is energized, indicating that the associated actuator should operate—think of a lamp, motor, valve, or solenoid, or even an internal relay used to drive other outputs. Inputs are shown as contacts that sense sensors or switches, not as coils. The power supply provides the voltage, but the coil itself is the device being activated, which is why it’s categorized as an output.

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