Configuration Of A Fail-Safe System With Simatic S7-1500Hf - Siemens SIMATIC S7-1500 System Manual

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 4-15 S7‑1500H 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
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
System overview
4.2 Configuration
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