Why Switch to the New Siemens CPU 6ES7510‑1DK03‑0AB0

July 21, 2025

Is switching to the new Siemens CPU 6ES7510‑1DK03‑0AB0 worth it? The short answer is — YES, if you’re looking for higher performance, more efficient memory, and sustainable security. However, the previous model 6ES7510‑1DJ01‑0AB0 still offers stable performance in many environments and is currently available at a competitive price. Let’s compare both models, highlight their technical differences, and help you make the right decision for your automation project.

Why is the previous model discontinued?
What has been improved?
Why choose the new CPU?
Why the old model still works
Things to consider before switching
Comparison table

Why is the previous model discontinued?

The 6ES7510‑1DJ01‑0AB0 model has delivered reliable performance for years. However, it has certain limitations — smaller memory, slower processing, and reduced software support. Siemens continuously evolves to meet modern industrial demands, and upgrading the hardware was a logical step toward higher productivity and better energy efficiency.

What has been improved?

Twice the program memory: 200 KB vs. 100 KB — supports more complex control logic and safety functions.
12x faster processing time: from 72 ns to 6 ns — ensures higher precision and system stability.
More compact and lightweight design: 265 g vs. 384 g — easier to install in tight spaces.
Future-ready: Compatible with TIA Portal V18/V20, and equipped with updates and cybersecurity features.

Upgrading to a newer Siemens CPU is not just maintenance — it's an improvement.

With increased performance, greater memory capacity, and active Siemens support, this CPU is ready for both today’s and tomorrow’s automation challenges.

Why choose the new CPU – 6ES7510‑1DK03‑0AB0?

Fast processing time: 6 ns vs. 72 ns — ideal for real-time processes.
Increased memory: 200 KB for program, 1 MB for data.
Compatible with TIA Portal V18+ (FW 3.0+) and V20.
Energy efficiency: 3.5 W consumption vs. 5.6 W on the older model.
Security features: Secure Boot, signed firmware, PROFINET Security Class 1.
Data exchange: up to 128 IO in RT mode, 64 IO with IRT.

Why the old model still works

Proven value: A stable and reliable solution used for years.
Easy integration: Compatible with existing configurations and components.

Things to consider before switching

Check your TIA Portal version — upgrades are smoother with V18/V20.
Evaluate the gains in energy efficiency and processing power — crucial for high-performance systems.
Plan for spare parts availability — Siemens will continue to offer parts for the old model, but will not provide further updates.

If stability, performance, and long-term sustainability are your priorities — the switch is highly recommended.

Comparison table

	6ES7510‑1DJ01‑0AB0	6ES7510‑1DK03‑0AB0
Program memory	100 KB	200 KB
Data memory	750 KB	1 MB
Bit processing time	72 ns	6 ns
Firmware version	V2.9	V4.0
TIA Portal support	Up to V17	From V20
Retentive memory	128 KB	256 KB
Power consumption	5.6 W	3.5 W
Weight	384 g	265 g

Switching to 6ES7510‑1DK03‑0AB0 brings not only performance benefits but also advantages in safety and energy efficiency. Whether you are building a new system or modernizing an existing one — this CPU is a worthwhile investment. However, if your current configuration works reliably without risk, the 6ES7510‑1DJ01‑0AB0 remains a trusted solution with ongoing value.