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PE-11(2) PE · Physical and Environmental Protection

Alternate Power Supply — Self-contained

LOW MODERATE HIGH
1 Overlay 0 Related Controls
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Requirements NIST SOURCE

Provide an alternate power supply for the system that is activated [one of: manually; automatically] and that is:

Discussion (NIST Supplemental Guidance)

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.

Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for PE-11(2) yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. one of the following PARAMETER VALUES is selected: {manually; automatically};
  2. one of the following PARAMETER VALUES is selected: {minimally required operational capability; full operational capability};
  3. an alternate power supply provided for the system is activated <PE-11(02)_ODP[01] SELECTED PARAMETER VALUE>;
  4. the alternate power supply provided for the system is self-contained;
  5. the alternate power supply provided for the system is not reliant on external power generation;
  6. the alternate power supply provided for the system is capable of maintaining <PE-11(02)_ODP[02] SELECTED PARAMETER VALUE> in the event of an extended loss of the primary power source.

Examine

[SELECT FROM: Physical and environmental protection policy; procedures addressing emergency power; alternate power supply; alternate power supply documentation; alternate power supply test records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with the responsibility for emergency power and/or planning; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Mechanisms supporting and/or implementing an alternate power supply; the alternate power supply].

Overlays

Showing the OT/ICS overlay for the parent control PE-11 — see the PE-11(2) entries within each baseline below.

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

Not applicable at this tier.

MODERATE

  • Base control: Included (matches standard baseline)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (1)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for PE-11(2). This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • Physical and environmental protection policy
  • system security plan

Testing

  • Mechanisms supporting and/or implementing an alternate power supply
  • the alternate power supply

Other Records

  • procedures addressing emergency power
  • alternate power supply
  • alternate power supply documentation
  • alternate power supply test records
  • other relevant documents or records