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SIL Controller CPU Models

Dear Customer,

Here's a breakdown of CPU models suitable for SIL2 and SIL3 safety controllers within the Siemens portfolio. Please note that achieving a specific SIL level requires more than just the CPU; it depends on the entire system design, software, and adherence to safety standards.

SIL2 Controllers

• SIMATIC S7-1500: CPUs 1511-1 PN, 1513-1 PN, 1515-2 PN, 1516-3 PN (with appropriate safety modules like Failsafe Output Modules)
• SIMATIC S7-1200: CPUs 1214C DC/DC/DC, 1215C DC/DC/DC (with Failsafe modules) - *Limited functionality compared to S7-1500 for SIL2*

SIL3 Controllers

• SIMATIC S7-1500: CPUs 1515-2 PN, 1516-3 PN, 1517-3 PN (When combined with redundancy and certified safety modules)
• SIMATIC ET 200SP: CPUs CP 1515, CP 1516 (with appropriate safety modules and redundancy)

Important Resources:

• Siemens Safety Integrated
• SiePortal - For detailed documentation, certifications, and configuration tools.

For specific project requirements and detailed certification information, please consult the SiePortal and relevant safety manuals. It's crucial to perform a thorough safety assessment for your application.

Sincerely,
Siemens Self Support