Siemens CPU 1518F-4 PN/DP MFP + C/C++ RT (6ES75184FX001AC0)

Key Specifications

This Siemens SIMATIC S7-1500 CPU ships as a boxed unit (non-expandable) with onboard Ethernet/RJ45 and a 60MB memory footprint. The unit is DIN Rail-mounted and rated for 0°C to 60°C operation. The MPN prefix "6ES7" and suffix "-4 PN/DP MFP + C/C++ RT" place this in the S7-1500F fail-safe family with PN/PN couplings, PROFIBUS DP, and integrated multi-function platform runtime for C/C++ applications.

Overview

The 6ES75184FX001AC0 is a high-performance fail-safe programmable controller in the Siemens SIMATIC S7-1500 family. The F designation indicates built-in safety functions suitable for process automation applications requiring safety integrity levels. The onboard Ethernet interface supports standard S7 communication and PROFINET protocols. The MFP (Multi-Function Platform) designation indicates this unit can host custom C/C++ runtime routines alongside the standard PLC scan. With 60MB of memory, this CPU handles mid-to-large scale programs and data logging. The non-expandable, box-style encapsulation targets applications where the controller integrates without additional local expansion chassis.

Catalog Comparison

The following in-catalog parts share the SIMATIC S7-1500 series context or parametric overlap with the primary CPU. They are listed for screening purposes only and have not been evaluated as interchange replacements.

Why these are similar:

• 6ES75221BF000AB0: Shares the SIMATIC S7-1500 series designation, box encapsulation, DIN Rail mounting, and non-expandable architecture. This is a high-feature (HF) discrete output module, not a CPU, but shares the same mechanical and series platform as the 6ES75184FX001AC0.

The remaining alternates (6ES7215x, 6ES7214x, 6ES7212x, 6ES7211x) are S7-1200 family controllers. They differ in series platform, memory scale (50KB–150KB versus 60MB), and physical form factor. They do not share the fail-safe designation or MFP runtime capability of the primary part.

Selection Notes

• This CPU is part of the SIMATIC S7-1500F fail-safe family, distinguished by the "F" in the product name. The fail-safe architecture provides integrated safety functions for applications requiring SIL2 or SIL3 per IEC 61508.
• The MFP designation and C/C++ RT suffix indicate support for custom real-time code execution alongside standard PLC logic. This is relevant when application-specific signal processing or proprietary algorithms need to run deterministically on the controller.
• The 60MB memory size supports programs significantly larger than the S7-1200 family range (50KB–150KB) shown in the alternates.
• With non-expandable encapsulation, any local I/O must be addressed via PROFIBUS DP or PROFINET remote I/O rather than a local expansion bus.

FAQ

What communications interfaces does the 6ES75184FX001AC0 provide?

The CPU includes onboard Ethernet with RJ45 connectors supporting PROFINET and standard S7 communication protocols, plus PROFIBUS DP (the "DP" in the product name).

What distinguishes the 1518F-4 from the S7-1200 family parts listed in the alternates?

The 1518F-4 is in the higher-performance S7-1500F fail-safe series with 60MB memory, MFP/C/C++ runtime support, and integrated safety functions. The S7-1200 alternates are compact controllers with 50KB–150KB memory, no fail-safe designation, and no MFP runtime capability.

Is the 6ES75184FX001AC0 RoHS compliant?

Yes. The part status records list ROHS3 Compliant.