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5 Operation
5.1 Display and connection elements
(1) Status displays (LED)
P = Voltage supply
S = Status
1 to 12 = Digital input/output
(LED is lit: Active)
(2) Voltage supply Out, DC 24 V
(3) Digital inputs/outputs
(4) Side system bus Out
(5) External voltage supply
DC 24 V
(6) Side system bus In
(7) Voltage supply In, DC 24 V
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