Contents
viii Series 90™-70 Enhanced Hot Standby CPU Redundancy User's Guide–May 2000 GFK-1527A
Fault Actions in a CPU Redundancy System.................................................................5-7
Configurable Faults...............................................................................................5-8
Non-Configurable Fault Group..............................................................................5-9
Fatal Faults on Both Units in the Same Sweep.......................................................5-9
On-Line Repair...........................................................................................................5-10
Maintaining Parallel Bus Termination...................................................................5-11
On-Line Repair Recommendations.......................................................................5-11
Power Supply....................................................................................................... 5-11
Racks................................................................................................................... 5-11
Central Processor Unit..........................................................................................5-12
Redundancy Communications Module and Cables................................................5-12
Redundancy Communications Link Failures.........................................................5-12
Bus Transmitter Module.......................................................................................5-13
Genius Bus Controller.......................................................................................... 5-13
Genius Bus...........................................................................................................5-13
Single Bus Networks Bus faults.......................................................................... 5-13
Dual Bus Networks.............................................................................................5-14
Genius Blocks......................................................................................................5-14
Appendix A Cabling Information .......................................................................................A-1IC690CBL714A Multi-drop Cable...............................................................................A-1
Purpose................................................................................................................. A-1
Specifications........................................................................................................A-1