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Input and Output Connections
AC-215x-B Series Hardware Installation Manual
21
Figure 9: Normally Open Input Connection
4.1.2
Normally Closed Input Connection
Normally Closed Input has two states:
Switch Closed – Normal State:
Loop resistance = 0 (short circuit).
Switch Open – Abnormal State:
Loop resistance = Infinite (open circuit).
Figure 10: Normally Closed Input Connection