Configuration example
① Optional load current supply
② CPU (with two synchronization modules, connected underneath, not visible in the diagram)
③ Mounting rail with integrated DIN rail profile
④ Redundancy connections (fiber-optic cables)
⑤ PROFINET cable
Figure 4-15S7‑1500H configuration example
4.2.3 Configuration of a fail-safe system with SIMATIC S7-1500HF
Configuration
Fail-safe automation systems (F-systems) are used in systems with higher safety
requirements. F-systems control processes and ensure that they are in a safe state
immediately after shutdown. In other words, F-systems control processes in which an
immediate shutdown does not endanger persons or the environment. The 1518HF-4 PN CPU
is a high-availability H-CPU with integrated F-functionality (HF-CPU).
The HF-system is made up of the following components:
•
Two HF-CPUs
•
Two SIMATIC memory cards
•
Four synchronization modules (two synchronization modules in each HF-CPU)
•
Two redundancy connections (two duplex fiber-optic cables)
•
IO devices with fail-safe modules
•
Load current supply (optional)
You can combine fail-safe I/O modules and non-fail-safe I/O modules in the IO devices.
The HF-system (with the 1518HF-4 PN CPUs) exchanges:
•
Safety-relevant data with fail-safe modules of the IO devices
•
Non-safety-relevant data with non-fail-safe modules of the IO devices
41
System overview
4.2 Configuration
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
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