Siemens S7-300 Installation Manual page 83

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• Configuration of the automation system is complete.
• The rail is installed.
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Snap the modules onto the rail, starting at the left and in the following order:
1. Power supply module
2. CPU
3. signal modules, function modules, communication modules, interface modules
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If you install SM 331 analog input modules, please check EHIRUH installation
whether you have to reposition the measuring range submodules at the side of the
module. See Chapter 4 on analog modules in the 0RGXOH 'DWD Reference Manual.
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If you want to create the S7-300 with a floating reference potential, you must
establish this state on the CPU, ideally before you attach it to the rail. The section
entitled &UHDWLQJ DQ 6 ZLWK IORDWLQJ UHIHUHQFH SRWHQWLDO contains the
necessary instructions.
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
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