Chapter 5 Input and Output Function
5-1
Chapter 5 Input and Output Function
5.1 Input and Output Specification
Digital input that PLC option card of iS7 inverter offers are made to use both electric current sink and
electric current source. (NPN/PNP types) To keep using the coil load as an output module, maximum
opening and shutting frequency is 1 second On and 1 second Off.
The following diagram shows maximum life relay for relay output.
Frequency (×10,000)
100
50
30
20
10
100
10 5
3 2 1
0.5
Opening/shutting of electric current (A)
AC 250 Resistor Load
C 30
Resistor Load
AC 125 Resistor Load
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