Hitachi 670 Series Application Manual page 32

Section 4
Analog and binary signal transfer for line differential protection
IEC10000069 V1 EN-US
Figure 21:
Figure 22
IEC10000070 V1 EN-US
Figure 22:
26
Signal matrix for one main and one redundant channel
shows a setting example when using a redundant channel.
Setting example with a redundant channel
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1MRK505382-UEN Rev. K
Communication set-up, 670/650 series
Application Guide