Replacing The Im 650 - Siemens SIMATIC ET 200PA SMART Operating Instructions Manual

Maintenance and service

6.3 Replacing the IM 650

5. Connect the power supply module to the line voltage.
6. Close the cover.
Behavior of the ET 200PA SMART after module replacement
If there is an error after replacement of the power supply module, you can view the cause of the
error in the diagnostic buffer of the CPU with
6.3 Replacing the IM 650
Initial situation
The IM 650 is mounted. A new IM 650 is to be mounted.
Slot numbering
If you have provided the modules in your system with slot numbering, when replacing modules
you must remove the numbering from the old module and then reuse it in the new module.
IM 650: Unplugging the bus connector
You can unplug the bus connector with looped-through bus cable from the PROFIBUS DP
interface without having to interrupt the data communication on the bus.
Note
Disturbance of the data communication on the bus is possible!
The bus segment must always be connected at both ends to the terminating resistor. This is not
the case, for example, when the last slave with the bus connector is de-energized. Because the
terminating resistor in the bus connector obtains its voltage from the device, the function of the
terminating resistor is impaired.
Ensure that the devices to which the terminating resistor is connected are always supplied with
voltage.
Tip: Use the PROFIBUS terminator as an active bus termination.
Replacement in the redundant configuration
Note
Replace the IM 650 only in de-energized state!
If the module is replaced while under voltage, the specified switchover times cannot be
guaranteed and the I/O modules may fail for a certain time and output "0".
60
HW Config .
Operating Instructions, 06/2019, A5E34192013-AB
ET 200PA SMART