Siemens SIMATIC S7-1500 System Manual page 59

Installation
5.6 Installing I/O modules
Installing I/O modules
Proceed as follows to install an I/O module:
1. Insert a U connector into the back right on the I/O module.
Exception: the last I/O module in the assembly
2. Install the I/O module on the mounting rail and slide the I/O module up to module on the
left.
3. Pivot the I/O module towards the back.
4. Fasten the I/O module (torque 1.5 Nm).
Figure 5-7
Uninstalling I/O modules
The I/O module is wired.
Proceed as follows to dismantle an I/O module:
1. Turn off all fed supply voltages.
2. Open the front cover.
3. For communication modules: Loosen and remove the connector from the module.
At I/O modules: Pull the front connector out of the I/O module using the unlocking strap.
4. Loosen the fixing screw of the I/O module.
5. Pivot the I/O module out of the mounting rail.
58
Installing I/O module
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB