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Table 2-3
Communication between sensors/actuators and the automation system
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Which module is suitable for my sensor/actuator?
How many sensors/actuators can I connect to the
module?
To connect my sensors/actuators to the PLC, how
do I wire the front connector ?
When do I require expansion modules (EM), and
how are they connected?
How do I mount modules in module racks / on
profile rails?
Table 2-4
Use of centralized and decentralized peripherals
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Which range of modules do I want to use?
Table 2-5
Configuration consisting of the central processing unit (CPU) and expansion modules (EMs)
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Which rack / rail is best suited to my application?
Which Interface modules (IM) do I need to connect
EMs to the CPU?
What is the right power supply (PS) for my
application?
2-2
for CPU: in applicable &38 'DWD Reference
Manual
for signal modules: 0RGXOH 'DWD Reference Manual
for CPU: in applicable &38 'DWD Reference
Manual
for signal modules: 0RGXOH 'DWD Reference Manual
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for local I/O / expansion modules (EMs): 0RGXOH
'DWD Reference Manual
for distributed I/Os / PROFIBUS DP: Manual of the
relevant I/O device, e.g. 0DQXDO (7 %
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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
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