Installing And Removing The Cpu - Siemens S7-1200 System Manual

Installation
3.3 Installation and removal procedures
Do not disconnect equipment when a flammable or combustible atmosphere is present.
Disconnection of equipment when a flammable or combustible atmosphere is present may
cause a fire or explosion which could result in death, serious injury and/or property
damage.
Always follow appropriate safety precautions when a flammable or combustible atmosphere
is present.
Note
Electrostatic discharge can damage the device or the receptacle on the CPU.
Make contact with a grounded conductive pad and/or wear a grounded wrist strap whenever
you handle the device.
3.3.2

Installing and removing the CPU

You can install the CPU on a panel or on a DIN rail.
Note
Attach any communication modules to the CPU and install the assembly as a unit. Install
signal modules separately after the CPU has been installed.
Consider the following when installing the units on the DIN rail or on a panel:
● For DIN rail mounting, make sure the upper DIN rail clip is in the latched (inner) position
and that the lower DIN rail clip is in the extended position for the CPU and attached CMs.
● After installing the devices on the DIN rail, move the lower DIN rail clips to the latched
position to lock the devices on the DIN rail.
● For panel mounting, make sure the DIN rail clips are pushed to the extended position.
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WARNING
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG