Both Uses

redundant
in
Sole Survivor
(Auto-generated)

Likewise, he is pierced by redundant intravenous-drip lines, one in each arm and one in his left thigh, through which he receives life-sustaining nourishment, a balance of fluids, and a variety of drugs as his handlers see fit to administer them.†
Chpt 4.16
If any of these IV drips or other lifelines works loose or otherwise fails, an insistent alarm immediately alerts the handlers, and in spite of the existence of redundant systems, repairs are undertaken without delay.†
Chpt 4.16 *

Definitions:

(1) (redundant)
more than is needed -- often something that is unnecessarily repeated

or in technical usage: describing a secondary component designed to work if the primary component fails
(2) (meaning too rare to warrant focus)