CPU 1518F-4 PN/DP MFP + C/C++ RT — Technical Specification and Selection Guide
Overview (Verification-Required Context)
The 6ES75184FX001AC0 is a SIMATIC S7-1500F fail-safe CPU targeting machine safety and standard control on the same hardware platform. The supplied catalog fields contain no power-supply voltage, no current draw, no PROFINET/PROFIBUS rating, no safety-integrity level, and no discrete I/O count. Before proceeding with any electrical design—enclosure planning, backplane current budgeting, or safety-function definition—those parameters must be confirmed against the official Siemens datasheet and system manual. The 60 MB work memory and DIN-rail mounting are among the few verifiable points in the data source.
Key Parameters
| Parameter | Value (as cataloged) | Notes |
|---|---|---|
| MPN | 6ES75184FX001AC0 | Full ordering code per Siemens 6ES7 family |
| Series | SIMATIC S7-1500 | High-performance PLC family; F variant implies safety functions |
| Product Status | Active | — |
| RoHS | ROHS3 Compliant | — |
| Memory Size | 60 MB | Work memory; note: S7-1500F family also carries safety program memory separately |
| Communications | Ethernet, RJ45 | PROFINET is standard on S7-1500; exact interface type/rating not in fields |
| Mounting Type | DIN Rail | Standard S7-1500 profile |
| Encapsulation | Box | Non-display, onboard interfaces only |
| Expandable | Non-Expandable | CPU itself is a standalone module; I/O modules plug into a separate rack |
| Operating Temperature | 0°C to 60°C | — |
Parameters not provided in data source (verify before selection):
- Supply voltage (24 VDC or 120/230 VAC — must match your system power design)
- Current draw / power consumption (required for power-supply sizing and heat calculation)
- Number of onboard PROFINET ports (PN/DP suffix implies PROFINET + PROFIBUS DP; port speeds not specified)
- Safety integrity level (SIL / PL rating — critical for functional-safety applications; not in fields)
- Discrete digital I/O count (this CPU has no built-in I/O; all I/O is rack-mounted)
- Backplane current budget (for calculating how many I/O modules are permissible on the local expansion rack)
- PROFIsafe support (standard on S7-1500F, but confirm with datasheet)
- Real-time (RT) vs isochronous real-time (IRT) capability on PROFINET
- Programming software (TIA Portal version required)
- Certifications beyond RoHS (no CE/UL/KC data in supplied fields)
Integration / Installation Notes
The 6ES75184FX001AC0 is a PLC CPU module that mounts on a DIN rail within a cabinet. The data source does not specify the rack system (e.g., ET 200SP HA or S7-1500 expansion), the IP rating of the enclosure, or the required clearance for ventilation. Given the 0–60 °C operating range, thermal management in sealed cabinets should be verified against the system manual. No onboard display is present; operation and diagnostics rely on TIA Portal, HMI, or web-based interfaces over Ethernet. Cabling, grounding, and shield termination for PROFINET and PROFIBUS segments must follow Siemens installation guidelines.
Selection and Substitution Guidance
The 6ES75184FX001AC0 is a high-end S7-1500F CPU with onboard Ethernet and PROFIBUS interfaces and firmware-based safety functions. It is not a drop-in functional equivalent for S7-1200 family CPUs (the alternates listed) in terms of memory, cycle time, safety capability, or expansion capacity. Substituting a lower-series CPU into a safety-rated application would require a complete safety-argument review. When selecting a replacement, confirm:
- Matching PROFIBUS DP interface (DP master capability)
- Matching PROFINET interface (PN controller or PN device role)
- Safety program memory size and SIL capability
- Compatibility with the installed I/O module family
Similar Catalog Parts
The comparison table covers shared specification keys present in both the primary MPN and alternate rows. All listed alternates are S7-1200 family compact CPUs or an S7-1500 digital-output module; they differ significantly in performance class and form factor.
| Spec Key | 6ES75184FX001AC0 (primary) | 6ES75221BF000AB0 | 6ES72151AF400XB0 |
|---|---|---|---|
| Series | SIMATIC S7-1500 | SIMATIC S7-1500 | SIMATIC S7-1500 |
| Expandable | Non-Expandable | Non-Expandable | Non-Expandable |
| Mounting Type | DIN Rail | DIN Rail | DIN Rail |
| Encapsulation | Box | Box | Box |
| Communications | Ethernet, RJ45 | — | Ethernet, RJ45 |
| Memory Size | 60 MB | — | 150 KB |
| Operating Temperature | 0°C ~ 60°C | — | 0°C ~ 55°C |
| Product Status | Active | Active | Active |
| RoHS | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Similarity (0–1) | — | 0.75 | 0.66 |
Why the alternates are listed
- 6ES75221BF000AB0 — shares the S7-1500 series, DIN-rail mounting, and box encapsulation; same expandable/non-expandable designation. However, it is a discrete-output rack module (DQ 8×24 VDC/2A HF), not a CPU. Similarity reflects shared brand/series/mounting parameters only.
- 6ES72151AF400XB0 — shares brand, series family name, Ethernet/RJ45 communications, and DIN-rail mounting. However, it is an S7-1200 compact CPU (not S7-1500), with 150 KB memory (vs 60 MB) and 14DI/10DO onboard I/O. The S7-1200 family is a lower-performance line; substitution would require a new project configuration.
FAQ
Q: What programming software is required for the 6ES75184FX001AC0?
A: The supplied catalog fields do not list the required software. SIMATIC S7-1500 CPUs are typically programmed with TIA Portal (STEP 7 Professional); the minimum version should be confirmed in the Siemens configuration manual for the 6ES7518 family.
Q: Does the 6ES75184FX001AC0 support PROFINET IRT for motion-control-grade determinism?
A: The supplied fields state only "Ethernet, RJ45" under communications and do not specify PROFINET capability level. The PN suffix in the product name suggests PROFINET support, but real-time (RT) vs isochronous real-time (IRT) designation should be verified against the datasheet before any motion-control or tight-synchronization application.
Q: Can the S7-1200 alternates be used as substitutes for the 6ES75184FX001AC0 in a fail-safe application?
A: No. The S7-1200 alternates (6ES72151AF400XB0 and others) are standard compact CPUs with no fail-safe capability. The 6ES75184FX001AC0 is an F-CPU variant; any replacement would need to meet the same safety-integrity requirements. The data source does not provide SIL/PL ratings for either the primary or alternate parts.