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4
4.1
4.2
Checking the binary I/O circuits
Checking the binary I/O circuits
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 terminal's speci-
fications.
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 the terminal's specifications.
Chapter 6
Checking the external circuitry
49
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