Installing And Removing A Cm Or Cp - Siemens SIMATIC S7 System Manual

96BInstallation
3.3 Installation and removal procedures
Table 3- 7 Removing an SM
Task
3.3.5

Installing and removing a CM or CP

Attach any communication modules to the CPU and install the assembly as a unit, as shown
in Installing and removing the CPU (Page 44).
Table 3- 8 Installing a CM or CP
Task
48
Procedure
You can remove any SM without removing the CPU or other SMs in place.
1. Ensure that the CPU and all S7-1200 equipment are disconnected from
electrical power.
2. Remove the I/O connectors and wiring from the SM (Page 50).
3. Retract the bus connector.
– Place a screwdriver beside the tab on the top of the SM.
– Press down to disengage the connector from the CPU.
– Slide the tab fully to the right.
If there is another SM to the right, repeat this procedure for that SM.
Remove the SM:
1. Pull out the bottom DIN rail clip to release the SM from the rail.
2. Rotate the SM up and off the rail. Remove the SM from the system.
3. If required, cover the bus connector on the CPU to avoid contamination.
Follow the same procedure to remove a signal module from a signal module.
Procedure
1. Ensure that the CPU and all S7-1200 equipment are
disconnected from electrical power.
2. Attach the CM to the CPU before installing the assembly
as a unit to the DIN rail or panel.
3. Remove the bus cover from the left side of the CPU:
–
–
4. Remove the bus cover. Retain the cover for reuse.
5. Connect the CM or CP to the CPU:
–
–
6. Install the CPU and CP on a DIN rail or panel.
Insert a screwdriver into the slot above the bus cover.
Gently pry out the cover at its top.
Align the bus connector and the posts of the CM with
the holes of the CPU
Firmly press the units together until the posts snap into
place.
System Manual, 11/2011, A5E02486680-05
S7-1200 Programmable controller