Siemens Simatic ET 200S Operating Instructions Manual page 106

Wiring and assembly
5.5 Plugging and removing electronic modules and COMPACT modules
Figure 5-14
Implementing an electronic module or COMPACT module type change
You have already removed the electronic module or COMPACT module:
1. Use a screwdriver to push the code element out of the terminal module.
2. Reinsert the coding key onto the used electronic module or COMPACT module.
3. Insert the electronic module or COMPACT module (type change) into the terminal module
4. Label the new electronic module or COMPACT module.
5-26
Removing COMPACT modules
until you hear it snap into place.
Operating Instructions, 12/2005, A5E00515771-03
ET 200S