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Four State Supervision

This is the most secure wiring type. With double End-of-Line resistor wiring (series/parallel), the control panel is able to differentiate between four conditions: (1) Zone normal (2) Zone violated (3) Open circuit: ∞Ω (4) Short circuit: 0Ω
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FieldValue
Definition 1

This is the most secure wiring type. With double End-of-Line resistor wiring (series/parallel), the control panel is able to differentiate between four conditions:
(1) Zone normal
(2) Zone violated
(3) Open circuit: ∞Ω (4) Short circuit: 0Ω

CategoriesAdministration, Safety, Security
Term OPIAU - Office of Environment, Health, Safety and Security
Definition typeDefinition
RelatedSources

Source 1:

DOE O 473.1A, Physical Protection Program

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