Sierra Video Yosemite - Manual (Page 72)

SIERRA VIDEO
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Redundant 505150 Processors
Introduction
The Yosemite Family supports the use of redundant processors. A system with this option has two
different control processors. At any given time, one of the processors is the master and the other is the
standby processor. The master processor is the one that controls the system. The standby processor
simply monitors the activity of the master processor, keeping track of the same routing switcher status
information as the master, and takes over the job of master if it detects that the master processor has
failed.
To enable redundant processors, DIP switch S1-2 must be ON on booth processors. If it is off, the
processor will ignore the presence of another processor and will start up as master processor and control
the entire system. It will not flash the LED that indicates that the other processor has a problem.
The two processors always monitor each other and present status information on the processor LEDs to
indicate the processor health.
Important: all DIP Switches except S1-2 must be set identically on both processors, or
the slave will flash the “I am sick” LED.
Yosemite 505150 Control
Processor Module