Siemens SIMATIC ET 200M Operating Instructions Manual page 106

Maintenance and service
7.3 replacing the IM 153-1
Response of the ET 200M After Module Replacement
If there is an error after replacing the module, with
cause of the error in the diagnostics buffer.
7.3 replacing the IM 153-1
Initial Situation
The IM 153-1 is installed. A new IM 153-1 of the same type should be installed.
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.
Pull out the bus connector
You can remove the bus connector with worn-through bus cable from the PROFIBUS DP
interface without having to interrupt the data traffic to the bus.
Note
A data communication error may occur on the network.
A bus segment must always be terminated at both ends with the terminating resistor. For
example, this is not the case when the last slave with the bus connector is deactivated. As
the terminating resistor in the bus connector obtains its voltage from the node, the function of
the terminating resistor is affected.
Ensure that the nodes to which the terminating resistor is connected are always supplied
with voltage.
Tip: Use the PROFIBUS terminator as an active bus connector.
Removing a Module
To remove the module, proceed as follows:
1. Switch the on / off switch of the power supply module to position 0 ( : output voltages
2. Tighten the bus connector.
3. Disconnect the wiring.
4. Loosen the fixing screws of the IM 153-1.
5. Swing out the IM 153-1.
104
0 V).
STEP 5 STEP 7
or
Operating Instructions, 12/2008, EWA-4NEB780600602-08
you can view the
ET 200M