Label The Modules; Slot Numbers For S7 Modules - Siemens SIMATIC S7-300 Hardware And Installation Manual

6.4

Label the modules

Assigning slot numbers
After installation, you should assign a slot number to each module. This makes it
easier to assign the modules in the configuration table in STEP 7. The table below
shows the slot number assignment.
Table 6-4
Slot number
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02

Slot numbers for S7 modules

Module
1 Power supply (PS)
2 CPU
3 Interface module (IM)
4 1st signal module
5 2nd signal module
6 3rd signal module
7 4th signal module
8 5th signal module
9 6th signal module
10 7th signal module
11 8th signal module
Installation
Remarks
–
–
To the right of the CPU
To the right of the CPU or IM
–
–
–
–
–
–
–
6-9