Installing And Removing The Cpu - Siemens SIMATIC S7 System Manual

Installation
3.3 Installation and removal procedures
3.3.2

Installing and removing the CPU

The CPU can be easily installed on a standard DIN rail or on a panel. DIN rail clips are
provided to secure the device on the DIN rail. The clips also snap into an extended position
to provide a screw mounting position for panel-mounting the unit.
①
②
Figure 3-1
Before you install or remove any electrical device, ensure that the power to that equipment
has been turned off. Also, ensure that the power to any related equipment has been turned
off.
Remove power to PLC before installing or removing equipment
Attempts to install or remove the PLC or related equipment with the power applied could
cause electric shock or faulty operation of equipment.
Failure to disable all power to the PLC and related equipment during installation or removal
procedures could result in death or serious injury to personnel, and/or damage to
equipment.
Always follow appropriate safety precautions and ensure that power to the PLC is disabled
before attempting to install or remove the CPU or related equipment.
Always ensure that whenever you replace or install a device, you use the correct module or
equivalent device.
Module replacement
If you install an incorrect module, the program in the CPU could function unpredictably.
Failure to replace a device with the same model, orientation, or order could result in death
or serious injury to personnel, and/or damage to equipment.
Replace the device with the same model, and be sure to orient and position it correctly.
52
DIN rail installation
DIN rail clip in latched position
Installation on a DIN rail or on a panel
WARNING
WARNING
③
Panel installation
④
Clip in extended position
System Manual, V2.3, 07/2017, A5E03822230-AF
S7-200 SMART