S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
153
You create the device configuration for your PLC by adding a CPU and additional modules to
your project.
Communication module (CM) or communication processor (CP): Up to 3, inserted in slots 101,
Signal board (SB), communication board (CB) or battery board (BB): up to 1, inserted in the
Signal module (SM) for digital or analog I/O: up to 8, inserted in slots 2 through 9
(CPU 1214C, CPU 1215C and CPU 1217C allow 8, CPU 1212C allows 2, CPU 1211C does not
allow any)
Device configuration for the S7-1200 also supports "configuration control (Page 159)" where
you can configure a maximum configuration for a project including modules that you might
not actually use. This feature, sometimes also called "option handling", allows you to
configure a maximum configuration that you might use with variations in the installed
modules in multiple applications.