The SIMATIC S7-300 saves space, and it is compact and modular. It is a stranger to slot rules, and it has no need for fans. The modules are simply hung on a DIN rail and screwed on to form a rugged, electromagnetically compatible configuration. The backplane bus is already integrated into the modules: just plug in the bus connectors and you're ready to go. With the varied range of modules for the SIMATIC S7-300, centralized expansions and simple distributed structures can be configured - for low-cost spare parts management.
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