Peripheral power sequencer based on peripheral susceptibility to

Details Peripheral power sequencer based on peripheral susceptibility to Peripheral power sequencer based on peripheral susceptibility to

1985-10-25

1987-06-16

Smith, Jerry

Boots, shoes, and leggings

364141, 364143, 364492, 364200, 364900, 307 38, 307 40, 307 41, 361111, G05B 902, H02J 100

Patent

active

046740317

ABSTRACT:
A controller for use with a computer terminal sequentially actuates a plurality of relays each coupled in a respective AC line wherein each of the AC lines is coupled to and energizes one of a plurality of computer terminal peripherals. The sequence in which the various peripherals are powered up is determined by the relative sensitivity of each peripheral to line voltage and switching transients, with the most sensitive peripherals energized last and the least sensitive peripherals energized first. A sufficient interval is provided between each sequential peripheral power up to allow for the settling out of switching transients. Upon computer terminal power down, the controller sequentially removes power from each of the peripherals in a reverse order with power first removed from those peripheral devices most sensitive to the aforementioned line voltage and switching transients. A time delay is also incorporated in the power down sequence to allow for the settling out of switching transients. The controller is programmable to allow for the incorporation of additional peripheral devices in the system or their deletion therefrom so as to accommodate the resulting change in peripheral device sequential power up and power down.

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