NIST-PE-11(2) Alternate Power Supply — Self-contained

Provide an alternate power supply for the system that is activated [Selection (one of): manually; automatically] and that is: (a) Self-contained; (b) Not reliant on external power generation; and (c) Capable of maintaining [Selection (one of): minimally required operational capability; full operational capability] in the event of an extended loss of the primary power source.

The provision of a long-term, self-contained power supply can be satisfied by using one or more generators with sufficient capacity to meet the needs of the organization.