What happens when the "deadman" switch is released on the PCU?

Releasing the "deadman" switch on the Power Control Unit (PCU) results in the shutdown of the operational mode. The deadman switch is a safety feature designed to ensure that critical systems are actively controlled by a human operator. When this switch is released, it indicates that the operator is no longer able to maintain control, leading to an automatic shutdown of operations to prevent potential hazards or accidents. In the context of the PCU, this shutdown prevents unintentional activation and maintains safety protocols for munitions systems.

The other options do not accurately reflect the function of the deadman switch. When the switch is released, the trailer does not enter standby mode or power up; rather, it halts operations to prioritize safety. Additionally, while resetting may occur under certain conditions, it is distinct from the immediate effect of shutting off the operational mode.