System To Prevent Plugging In The Wrong Module; Installing An I/O Module On A Bus Unit - Siemens SIMATIC S5 ET 200U Manual

Mechanical and Electrical Configuration
Installing an I/O
When installing an I/O module on a bus unit, proceed as follows (see Fig-
Module on a Bus ure 3-3):
Unit
1. Using a screw driver, set the coding key on the bus unit to the type of mo-
2. Hang the module on the top of the bus unit. (2)
3. Swing the module back. (3)
4. Press the module into place.
5. Fasten the screw on the bottom front of the module to attach the module
Figure 3-3 System to Prevent Plugging In the Wrong Module
3-6
dule that you are installing. The module type (2 to 8) is printed on the
front of the I/O module.
Setting the coding key to the correct module type prevents installing the
wrong type of module when you change modules. (1)
to the bus unit.
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b