Browse Prior Art Database

Improved Data Reliability and Reduced Cabling Hardware

IP.com Disclosure Number: IPCOM000037350D
Original Publication Date: 1989-Dec-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 3 page(s) / 86K

Publishing Venue

IBM

Related People

Johnstone, W: AUTHOR [+5]

Abstract

In large data processing equipment, the power control and monitoring interface may consist of both analog and digital signals, and the analog signals may pick up or introduce noises from/to the surrounding sources. Changing the power control and monitoring from a mixture of analog and digital signals to a totally digital interface eliminates much of the noise and reduces the number of cables required.

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Improved Data Reliability and Reduced Cabling Hardware

In large data processing equipment, the power control and monitoring interface may consist of both analog and digital signals, and the analog signals may pick up or introduce noises from/to the surrounding sources. Changing the power control and monitoring from a mixture of analog and digital signals to a totally digital interface eliminates much of the noise and reduces the number of cables required.

Fig. 1 illustrates the loop connection of power supplies 30 to the power control and diagnostic station 20 of the system. Fig. 2 shows the control and monitoring interface to a power supply 30 A, B, C, D, E. The functions that have been implemented here are: power-on, power-off, voltage adjustment, current limit setting, over-current status, current limit status and under-voltage status. The communica

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tion to the power supplies 30 is via twelve bit bus 13. Bus 13 is bidirectional in that some of the wires can be receiving data while other wires are gating data out. Communication starts off with every supply 30 A, B, C, D, E performing an address comparison by using switch 4 output to the address received from bus
13. The Address Equal signal 5 will become active if addresses are equal. Once the proper power supply has been selected, that supply will store the command in latch 6. If a write command is received, the power supply will load the data into data buffer 7. The data is used to turn on/off...