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Siemens SIMATIC S7-1500 Standard CPUs

Siemens SIMATIC S7-1500 Standard CPUs are modular advanced controllers spanning entry, mid-range and high-performance PN and PN/DP configurations. This collection excludes compact, fail-safe, technology, redundant, software-controller, ET 200SP CPU and SIPLUS variants.

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SIMATIC S7-1500 Standard CPU products

Compare exact Siemens order numbers by CPU tier, work memory and integrated network interfaces. Confirm the complete order number and engineering baseline before replacement or new-system selection.

How to select an S7-1500 Standard CPU

Start with the installed order number or system architecture, then compare memory, communication interfaces, performance and the required TIA Portal and firmware baseline.

Compact, F, T/TF, R/H, SIPLUS, ET 200SP and software-controller products are separate selection paths and are intentionally outside this collection.

  1. 01

    Match the exact order number

    CPU names repeat across hardware generations, so the complete 6ES7 order number is the safest replacement reference.

    • Complete MPN
    • Hardware functional status
    • Firmware version
  2. 02

    Size memory and performance

    Compare program memory, data memory and execution performance against the real application and future expansion margin.

    • Program work memory
    • Data work memory
    • CPU execution time
  3. 03

    Choose the network architecture

    Confirm how many PROFINET networks are needed and whether integrated PROFIBUS is required.

    • PROFINET interfaces and ports
    • Network separation
    • Integrated PROFIBUS

Where S7-1500 Standard CPUs fit

The range supports modular machine and plant automation where scalable memory, communication and diagnostics are central design requirements.

Modular machine control

Scalable central control for machines using S7-1500 central and distributed I/O architectures.

Networked production cells

CPU tiers with multiple interfaces help separate I/O, supervisory and plant-network traffic.

Mixed PROFINET and PROFIBUS systems

PN/DP models support projects that retain PROFIBUS devices while standardizing control on S7-1500.

SIMATIC S7-1500 Standard CPU questions

Boundary and selection checks for this collection.

Which CPUs are included in this collection?

The collection covers the nine exact catalog entries in Siemens' S7-1500 Standard CPUs branch: five PN-focused tiers, three PN/DP tiers and the CPU 1518-4 PN/DP MFP bundle.

Are compact, fail-safe or technology CPUs included?

No. Compact, F, T/TF, R/H, SIPLUS, ET 200SP and software-controller variants belong to separate official product branches and are excluded.

Why is the MFP `1AC0` bundle included instead of adding the `1AB0` CPU as another PDP?

Siemens lists 6ES7518-4AX00-1AC0 as the Standard CPU catalog offering. It consists of the 1AB0 CPU plus C/C++ Runtime and OPC UA Runtime licenses; the CPU component is not duplicated as a tenth collection product.

Can two CPUs with the same 151x designation be treated as direct replacements?

Not automatically. Verify the complete order number, hardware and firmware generation, work memory, interfaces and TIA Portal compatibility before replacement.

Need help sourcing an S7-1500 Standard CPU?

Send the complete Siemens order number, required condition, quantity, destination and target date for a tailored quotation.

Request a quote