The SIMATIC ET 200S distributed I/O system consists of:

• IM 151 Interface Module
• Digital and Analog Electronic Modules
• Technology modules, e. g., for counter/position detection tasks
• Motor starters and frequency converters
• Terminating module (part of the scope of supply of the IM 151)
• Power modules

One SIMATIC ET 200S station comprises of up to 63 I/O modules. The I/O modules can be combined as required.

The SIMATIC ET 200S is installed with permanent wiring:

All modules are plugged onto purely mechanical Terminal Modules. These Terminal Modules contain the complete wiring and can be mounted on standard 35 ? 15 mm (1.38 ? 0.59 in) or 35 ? 7.5 mm (1.38 ? 0.30 in) mounting rails.

This results in the following advantages:

• Simple implementation of the wiring without additional electronics components
• Fast and safe testing of wiring even under power
• Tool-free replacement of Electronics Modules
• Automatic coding of Electronics Modules for safe replacement (protected against polarity reversal)

The ET 200 Configurator software for designing the ET 200S and creating order lists is available for download:

http://www.siemens.com/ET200