Siemens 6ES7518-4AP00-0AB0 SIMATIC S7-1500 CPU 1518-4 PN/DP
ManufacturerSiemensModel6ES7518-4AP00-0AB0Product TypeSIMATIC S7-1500 CPU 1518-4 PN/DP central processing unit
01Product Identification
Siemens 6ES7518-4AP00-0AB0 is the SIMATIC S7-1500 CPU 1518-4 PN/DP with 6 MB program work memory, 60 MB data work memory and a typical 1 ns bit-operation time. Four communication paths cover PROFINET IRT with a two-port switch, a second PROFINET RT interface, a third Ethernet interface and PROFIBUS. The CPU is designed for large, performance-intensive automation projects whose network segmentation, communication resources and Memory Card must be engineered as a complete system.
Configuration ControlVerify the full article number, nameplate, electrical design, interfaces, software, wiring and lifecycle requirement before ordering.
02Engineering Data
| Manufacturer | Siemens |
|---|---|
| Article Number | 6ES7518-4AP00-0AB0 |
| Product Designation | CPU 1518-4 PN/DP |
| Automation Platform | SIMATIC S7-1500 |
| Program Work Memory | 6 MB |
| Data Work Memory | 60 MB |
| Load Memory | SIMATIC Memory Card, maximum 32 GB |
| Bit Processing Time, Typical | 1 ns |
| Interface 1 | PROFINET IRT with integrated 2-port switch |
| Interface 2 | PROFINET RT |
| Interface 3 | Ethernet |
| Interface 4 | PROFIBUS |
| Rated Supply | 24 V DC; permissible range 19.2 to 28.8 V DC |
| Firmware / Engineering | V2.9; TIA Portal V17 for FW V2.9 |
| Operating Temperature | 0 to 60 °C horizontal; 0 to 40 °C vertical |
03Functions
Operational Functions
- Executes typical bit operations in 1 ns for high-performance S7-1500 applications.
- Provides 6 MB program work memory and 60 MB data work memory.
- Separates traffic across three Ethernet / PROFINET interfaces plus PROFIBUS.
- Supports PROFINET IO controller and device functions, IRT and isochronous operation.
- Provides system diagnostics, I&M data, web-server functions and maintenance-free backup.
- Requires a SIMATIC Memory Card for load memory.
Identification
- Manufacturer: Siemens
- Model: 6ES7518-4AP00-0AB0
- Product Type: SIMATIC S7-1500 CPU 1518-4 PN/DP central processing unit
- Status: Product phase-out review
04Applications
Use Cases
- Large machine-control projects with extensive program and data requirements.
- Multi-network production systems that separate I/O, supervisory and plant communication.
- High-speed PROFINET IRT applications with synchronized distributed automation.
- Modernized systems that retain an engineered PROFIBUS segment.
- Central control tasks requiring large communication and diagnostic resources.
Compatibility Boundary
- Match the exact article, hardware status, firmware and TIA Portal project.
- Verify all three Ethernet / PROFINET configurations, device names, IP networks and IRT timing.
- Check the complete PROFIBUS master system, baud rate, addresses and termination.
- Use a supported SIMATIC Memory Card and retain its protection and certificate settings.
- Confirm all connected I/O devices, HMIs, drives, OPC UA or open-communication partners used by the project.
05Lifecycle
- Siemens records a product phase-out milestone dated 1 October 2025 for this CPU generation.
- Confirm current availability and the official migration path before committing to a long-term standard.
- Archive the full project, firmware, Memory Card, communication settings and asset documentation.
- Any newer CPU requires a comparison of program memory, data memory, processing performance and all four interfaces.
- After exchange, validate every network, synchronized process, diagnostic channel and operating mode.
