Signal modules

The signal modules have the same design features as the basic devices:

• Installation on DIN rails:
  The modules are snapped onto the rail next to the CPU on the right and are electrically and mechanically connected to each other and to the CPU by the integral slide mechanism
• Direct installation:
  Horizontal or vertical mounting on DIN rail or direct mounting in the cabinet using integral drill holes
• All digital modules are easy to replace thanks to removable connecting terminals ("independent wiring")

Signal boards

The signal boards are plugged directly into the receptacle on the front of each S7-1200 CPU.

• Mounting:
  Signal boards are plugged directly into the SIMATIC S7-1200 CPU and are thus electrically and mechanically connected to the CPU
• The CPU mounting dimensions remain unchanged
• All signal boards are easy to replace thanks to removable connecting terminals ("independent wiring")

Note

Signal modules cannot be used with the CPU 1211C.
Signal boards can be used with all CPUs of the SIMATIC S7-1200.