
Siemens 6ES7518-4FP00-0AB0 CPU 1518F-3 PN Specification Review
This entry details the SIMATIC S7-1500F CPU 1518F-3 PN, a central processing unit designed for fail-safe applications. The device features extensive memory resources and multiple communication interfaces for industrial networking.
Quick Facts
- Part number
- 6ES7518-4FP00-0AB0
- Brand
- Siemens
- Category
- PLC CPUs & Controllers
- Product type
- CPU 1518F-3 PN
- Lifecycle
- Phase Out Announce
- Dimensions
- 22.5 x 20.00 x 15.9 cm
- Net weight
- 2.223 Kg
- Source category
- CPU 1518F-3 PN
Product Overview
The SIMATIC S7-1500F series includes the CPU 1518F-3 PN, engineered for high-performance fail-safe control tasks in industrial environments. This central processing unit integrates robust safety logic with standard automation capabilities.
Recorded under the PLC CPU controllers category, this component supports complex automation architectures requiring both safety and standard functions. The unit is listed with specific lifecycle status indicating phase-out announcement.
Technical Review Notes
- Work memory capacity is recorded at 9 MB for program storage and 60 MB for data management within the central processing unit architecture.
- The first interface utilizes PROFINET IRT technology featuring a built-in two-port switch for deterministic real-time communication across network segments.
- A second interface provides PROFINET RT support, enabling flexible Ethernet connectivity for standard industrial automation protocols and data exchange requirements.
- Basic PROFINET services are accessible via a third interface, allowing integration with higher-level control systems and monitoring software platforms.
- PROFIBUS connectivity is established through a fourth interface, supporting legacy fieldbus devices and traditional serial communication networks in plant operations.
- Bit performance is specified at 1 nanosecond, ensuring rapid execution of safety-related logic and standard control instructions within the cycle time.
Model Identification
- The part number 6ES7518-4FP00-0AB0 identifies the specific hardware revision and configuration options for this fail-safe CPU module.
- Normalized part number 6ES75184FP000AB0 removes hyphens for database indexing and consistent technical documentation reference across systems.
- Brand designation Siemens confirms the manufacturer origin and aligns with the SIMATIC S7-1500F product family classification standards.
- Product type CPU 1518F-3 PN distinguishes this unit from other variants within the S7-1500F fail-safe controller lineup.
Technical Parameters
| Product type | CPU 1518F-3 PN |
|---|---|
| Lifecycle | Phase Out Announce |
| Dimensions | 22.5 x 20.00 x 15.9 cm |
| Net weight | 2.223 Kg |
| Source category | CPU 1518F-3 PN |
Parameters are factual source fields retained for model review.
Parameter Review
- Physical dimensions are listed as 22.5 x 20.00 x 15.9 cm, providing spatial requirements for rack mounting and enclosure planning.
- Net weight is recorded at 2.223 Kg, which assists in calculating load distribution for DIN rail or panel installation structures.
- Source category path indicates placement under Automation technology, Fail-safe CPUs, and specifically the CPU 1518F-3 PN subgrouping.
- Lifecycle status Phase Out Announce suggests reviewing long-term supply strategies and potential migration paths for existing installations.
- SIMATIC Memory Card requirement is noted as essential for operation, indicating external storage dependency for program and data retention.
Catalog Classification
Image & Label Review
- Visual inspection should confirm the presence of the PROFINET and PROFIBUS interface ports on the front panel of the unit.
- Label verification ensures the printed part number matches the inquiry subject 6ES7518-4FP00-0AB0 for accurate documentation alignment.
- Physical condition assessment checks for any visible damage to connectors or housing that might affect installation procedures.
- Mounting rail application context can be visually verified against standard DIN rail specifications used in industrial control cabinet designs.
Product Image Gallery

Inquiry Preparation
- Review project documents to confirm the necessity of fail-safe functionality alongside standard control requirements for the application.
- Verify network topology needs to ensure PROFINET IRT and RT interfaces meet the bandwidth and determinism demands.
- Check existing infrastructure for PROFIBUS devices to confirm the fourth interface supports current fieldbus communication protocols effectively.
- Assess memory card review details and specifications to ensure compliance with the SIMATIC Memory Card requirement for system operation.
Category Context
This component belongs to the broader Automation technology sector, specifically addressing programmable logic controller hardware solutions.
Placement within PLC CPUs & Controllers highlights its role as a central processing unit for industrial automation tasks.
Review Notes
- Confirm the phase-out status implications for maintenance and long-term operational continuity within the target facility.
- Evaluate the 1 ns bit performance against control loop requirements to ensure sufficient speed for safety logic execution.
- Cross-reference the 9 MB program and 60 MB data memory limits with current and future application scope.
- Document the physical dimensions and weight for logistical planning regarding shipping, handling, and final installation positioning.



