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High-Performance Fail-Safe CPU for SIMATIC S7-300 Safety Applications
The 6ES7317-2FK13-0AB0 serves as the CPU317F-2 PN/DP fail-safe central processing unit for the SIMATIC S7-300 platform. This CPU combines standard automation with integrated safety functionality for demanding industrial environments. It offers 1024 KB of integrated work memory for program and data storage. Furthermore, the module supports both PROFINET and PROFIBUS DP communication, providing flexible networking options for your control system. For this reason, the CPU317F-2 is ideal for applications requiring both safety and standard control in a single unit. Moreover, its fail-safe design ensures reliable operation even in critical processes where human safety is paramount.
Technical Specifications
The table below details the key technical parameters for the 6ES7317-2FK13-0AB0 CPU module.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Product Type | Fail-Safe CPU (CPU317F-2 PN/DP) |
| Series | SIMATIC S7-300 |
| Work Memory | 1024 KB (program and data) |
| Load Memory | MMC expandable up to 8 MB |
| Processing Speed (Bit) | 0.05 µs |
| Processing Speed (Float) | 1 µs |
| Interfaces | 1x MPI/DP (12 Mbit/s), 1x PROFINET |
| Supply Voltage | 24 V DC (20.4 to 28.8 V range) |
| Current Consumption | 650 mA (rated) |
| Power Loss | Typ. 3.5 W |
| Dimensions (W x H x D) | 80 mm x 125 mm x 130 mm |
| Weight | Approx. 0.52 kg |
| Hardware Product Version | 01 |
| Firmware Version | V2.6 |
| Block Capacity | Up to 2048 blocks (DBs, FCs, FBs) |
| Certifications | CE, UL, FM, Marine |
Fail-Safe Features and Application
The 6ES7317-2FK13-0AB0 excels in safety-critical applications requiring SIL 3 (IEC 61508) and PL e (EN ISO 13849-1) compliance. It supports the S7 Distributed Safety programming package from V5.4 or higher. The CPU integrates PROFIsafe protocol for secure communication with distributed I/O devices. Furthermore, it combines standard and safety programs within a single CPU, eliminating the need for separate hardware for safety functions. Consequently, this design significantly reduces both hardware costs and cabinet space. In addition, the integrated fail-safe functionality simplifies system architecture and reduces the complexity of safety programming.
Integration and Communication
The 6ES7317-2FK13-0AB0 features two interfaces: one MPI/DP interface (12 Mbit/s) and one PROFINET interface with built-in Ethernet. This design enables seamless integration with both legacy and modern automation networks. The CPU supports PG/OP communication, routing, and S7 communication functions. For programming, you can use STEP 7 from V5.3 SP3 onward with the necessary hardware update. The module serves as a spare part and has reached its product lifecycle end since October 2022; the successor model is 6ES7317-2FK14-0AB0. Therefore, we recommend planning for migration to the successor model for new projects while the 2FK13 remains a reliable spare for existing installations.