Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Reexamination Certificate
2007-10-09
2007-10-09
Ip, Paul (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
C318S560000, C318S568240, C307S064000, C701S301000, C701S301000, C361S030000
Reexamination Certificate
active
11395460
ABSTRACT:
A hot-pluggable I/O annex module of a storage processor assembly includes interface circuitry providing connections to an optional I/O interface module. The I/O annex module includes redundant cooling fans providing cooling airflow to an I/O annex mounting area, main power conversion circuitry for generating main operating power for the interface circuitry, auxiliary power conversion circuitry for generating auxiliary power, a controller for monitoring and controlling the operation of cooling fans; and monitoring circuitry powered by the auxiliary power for monitoring correct operation of the controller and, upon detecting incorrect operation, disabling the main power conversion circuitry. The monitoring circuitry includes a watchdog timer and a latch collectively operative to (i) determine if a controller status signal indicating correct operation of the controller does not toggle for a watch interval, and if so then (ii) enter an operating state in which the main power conversion circuitry is disabled and cannot be re-enabled except by cycling the primary power or removing and reinserting the I/O annex module to/from the storage processor assembly.
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Kozel Michael J.
Strickland Stephen
Sullivan Douglas
BainwoodHuang
EMC Corporation
Ip Paul
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