System overview
3.4 Components
Distributed I/O system
24 System Manual, 09/2019, A5E03576849-AJ
3.4 Components
Basic components of the ET 200SP distributed I/O system
Table 3- 2 Basic components of the ET 200SP
Mounting rail in accord-
ance with EN 60715
The mounting rail is the rack of the ET 200SP.
The ET 200SP is installed on the mounting rail.
The mounting rail is 35 mm high.
CPU/Fail-safe CPU The (F) CPU:
• Runs the user program. The F-CPU also
runs the safety program.
• Can be used as an IO controller or I-Device
on PROFINET IO or as a standalone CPU
• Links the ET 200SP to the IO devices or the
IO controller
• Exchanges data with the I/O modules via the
backplane bus.
Additional CPU functions:
• Communication via PROFIBUS DP (the CPU
can be used as a DP master or DP slave in
combination with the CM DP communication
module)
• Integrated Web server
• Integrated technology
• Integrated trace functionality
• Integrated system diagnostics
• Integrated safety
• Safety mode (when using fail-safe CPUs)
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