Siemens S7-300 - Page 108

Digital modules
8.4 SM 326; DI 8 x NAMUR
Fail-safe signal modules
108 Installation and Operating Manual, 01/2010, A5E00085586-10
Channel numbers
The channel numbers are used to uniquely identify the inputs and to assign channel-specific
diagnostic messages.
1oo2 evaluation of the sensors reduces the number of channels by half.
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Figure 8-25 Channel numbers for SM 326; DI 8 x NAMUR