S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
5-1
Installing
5
5.1 Installing an S7-300
Here we will explain the steps required for the mechanical assembly of an S7-300.
Note
Note the installation guidelines and notes on safety in this manual when mounting,
commissioning and operating S7-300 systems.
Open components
S7-300 modules are "Open Components" according to IEC 61131-2 and EC directive
73/23/EEC (Low-Voltage directive), and to UL/CSA Approval an "open type".
In order to conform with specifications on safe operation relating to mechanical strength,
inflammability, stability and touch-protection, the following alternative installation modes are
prescribed:
• Installation in a suitable cubicle
• Installation in a suitable cabinet
• Installation in an appropriately equipped and closed operating area
Access to these areas must only be possible with a key or tool. Only trained or authorized
personnel is allowed access to these cubicles, cabinets or electrical operating rooms.
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