How to change a SOK1208-0204 Module of a S-SERIES S155 Module

[Andi_H_]

Hello everyone,

i tried to exchange a SOK1208-0204 module of a S155 (S4), unfortunately without success. I can't separate the module from the S155. Is there a trick there? In the installation manual there is nothing about brackets or similar. We have loosened the 4 screws and tried to pull the module down as gently as possible. The visible plug (it is the left module) does not move a millimeter. Maybe someone has an idea?

Thanks in advance

Greeting Andi

[PeterK]

the option modules are often very strong connected to the main module.

Normaly you need to remote the top-plate and front plate. Than remove screws from option-module and try to pull carefully this module on 2 sides (e.g. front + back) in rotation (a bit front, a bit back, a bit front….)