Siemens S7-1200 - Security functions

Installation
3.3 Installation and removal procedures
S7-1200 Programmable controller
58 System Manual, 03/2014, A5E02486680-AG
Table 3- 3 Removing the CPU from a DIN rail
Task
Procedure
1. Ensure that the CPU and all S7-1200 equipment are
disconnected from electrical power.
2. Disconnect the I/O connectors, wiring, and cables from
the CPU (Page 63).
3. Remove the CPU and any attached communication
modules as a unit. All signal modules should remain
installed.
4. If an SM is connected to the CPU, retract the bus
connector:
– Place a screwdriver beside the tab on the top of the
signal module.
– Press down to disengage the connector from the
CPU.
– Slide the tab fully to the right.
5. Remove the CPU:
– Pull out the DIN rail clip to release the CPU from the
rail.
– Rotate the CPU up and off the rail, and remove the
CPU from the system.
3.3.3
Installing and removing an SB, CB, or BB
Table 3- 4 Installing an SB, CB, or BB 1297
Task
Procedure
1. Ensure that the CPU and all S7-1200 equipment are disconnected
from electrical power.
2. Remove the top and bottom terminal block covers from the CPU.
3.
Place a screwdriver into the slot on top of the CPU at the rear of the
cover.
4. Gently pry the cover up and remove it from the CPU.
5. Place the module straight down into its mounting position in the top
of the CPU.
6. Firmly press the module into position until it snaps into place.
7. Replace the terminal block covers.