Siemens SIMATIC ET 200SP System Manual page 124

The figure below shows a motor starter with a mounted 3DI/LC module.
Disassembly
Proceed as follows to remove a 3DI/LC module from a motor starter:
1. Push the release lever on the rear of the 3DI/LC module.
①
2. Remove the 3DI/LC module from the motor starter while pressing the release lever.
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
Release lever
6.14 Mounting/disassembly of motor starters
Wiring
123