Siemens SIMATIC S7 System Manual page 59

Table 3- 8 Removing an expansion module
Task
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Procedure
Follow the steps below to remove an expansion module:
1. Ensure that the CPU and all S7-200 SMART equipment are disconnected from
electrical power.
2. Remove the I/O connectors and wiring from the expansion module. Loosen the
DIN rail clips of all the S7-200 SMART devices.
3. Physically slide the expansion module to the right.
3.3 Installation and removal procedures
Installation
59