3. Installation
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For cases where the application uses CPU redundancy in the same rack, the time synchronization
signal generated by the GPS must be connected to the IRIG-B input of each one of the CPUs,
regardless of which CPU is in Active mode and which is in Standby mode, thus guaranteeing the
system time synchronism. In case the CPU needs to perform the repeater function of the IRIG-B
signal to other IEDs, use the output of one CPU only. Figure 3-34 shows an example of this type of
architecture.
Figure 3-34. Example of Sync for Redundant System