What happens to a Universal Output once it has been turned ON?

When a Universal Output is turned ON, it is designed to remain in the ON state until it is explicitly turned OFF either by a job instruction or manually by the operator. This functionality is essential for many control systems where the output needs to sustain its active state to perform tasks continuously, such as powering a motor or keeping a light illuminated.

The concept is straightforward: once you issue a command to activate the output, it doesn't automatically deactivate after a predetermined time or require further instructions to maintain its state. This ensures that devices reliant on the output continue to operate without interruptions until the user decides to turn them off or until the programmed job necessitates a shutdown.

The mechanisms described in the other choices involve behaviors that either introduce complexity not typically associated with a Universal Output or imply state changes that do not align with its operational intent. For instance, options suggesting automatic turn-off after a set duration or requiring additional commands could be applicable in different contexts but do not reflect the primary capability of sustaining an ON condition until intentionally changed.