ABB REL670 - Checking the Binary I;O Circuits; Binary Input Circuits; Binary Output Circuits

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Checking the binary I/O circuits Chapter 6
Checking the external optical and
electrical connections
5 Checking the binary I/O circuits
5.1 Binary input circuits
Preferably, disconnect the binary input connector from the binary input cards. Check all con-
nected signals so that both input level and polarity are in accordance with the IEDs specifica-
tions.
5.2 Binary output circuits
Preferably, disconnect the binary output connector from the binary output cards. Check all con-
nected signals so that both load and polarity are in accordance with IED specifications.