Redundant status indicators for fault tolerance

Details Redundant status indicators for fault tolerance Redundant status indicators for fault tolerance

1999-07-21

2000-10-31

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340636, 340653, 34082517, G08B 2100

Patent

active

06140926&

ABSTRACT:
A system includes multiple modules, each powered by a different power source, and a status indicator for a first of the modules. Any of the multiple modules can drive the status indicator. Each of the modules monitors the operation of the first module, driving the status indicator when the first module fails. Thus, even if a failure within the first module prevents the first module from driving the status indicator (e.g., a power failure), the status indicator is still driven by a second module.

REFERENCES:
patent: 4228535 (1980-10-01), Workman et al.
patent: 4528458 (1985-07-01), Nelson et al.
patent: 4675539 (1987-06-01), Nichol
patent: 4680753 (1987-07-01), Fulton et al.
patent: 4799039 (1989-01-01), Balcom et al.

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