Siemens S7-400 Removing the Front Connector Coding Key, Exchanging the Front Connector

Maintenance

Removing the Front Connector Coding Key

Before fitting the front connector, you must remove (break off) the front part of the coding key, because this part is already fitted in the wired front connector.

!Caution

The module can be damaged.

If, for example, you insert a front connector of a digital module in an analog module, the module may be damaged.

Only operate modules with their complete front connector coding key.

Installing a New Module

1.Attach the new module of the same type at the appropriate slot and swing it downwards.

2.Screw the module on with both mounting screws.

3.Fit the front connector.

4.If you have set the CPU to STOP, you must now set it to RUN again.

5.After fitting, each programmable module will be reinitialized by the CPU with parameters.

How the S7-400 Behaves after Exchanging Modules

If an error occurs after replacing a module, you can read out the cause of the error from the diagnostic buffer.

Exchanging the Front Connector

1.Switch off all load power supplies for the module.

2.Loosen the screw of the front connector and pull it off.

3.Remove the labels from the front connector and insert them into the new front connector.

4.Wire the new front connector.

5.Insert the front connector in the module.

6.Screw the front connector on.

7.Switch on the load voltage.

7-8	Automation System S7-400	Hardware and Installation
		A5E00850741-01