News

MICROMASTER Classic (6SE30xx) – First-generation Siemens legacy inverter

Siemens MICROMASTER Classic inverters represent one of the earliest AC drive platforms widely used in industrial automation between the 1990s and early 2000s. Even today they are installed in thousands of European plants and integrated into special machines no longer marketed but still strategic for production.

Their presence is particularly high in custom-designed lines, where complete replacement would require complex mechanical, electrical and software modifications.

S7 Communication and product roots: Siemens technologies for industrial communication in SIMATIC systems

In the Siemens catalog, S7 Communication identifies the set of technologies dedicated to industrial communication within SIMATIC systems.

This area includes modules and interfaces that enable PLCs to communicate with:

• industrial networks
• HMI
• inverters
• drives
• other PLCs
• SCADA systems

SIMATIC ET 200: the Siemens distributed I/O system for modular automation

In the Siemens catalog, SIMATIC ET 200 identifies the family of distributed I/O systems developed by Siemens to connect field signals, remote modules, and process units to the PLC architecture.

The logic of this range is simple:

• decentralize I/O
• reduce wiring
• increase modularity
• improve system flexibility
• simplify machine expansion

SIMATIC S7-1500: the high-performance Siemens platform for advanced automation

Within the Siemens catalogue, SIMATIC S7-1500 represents the high-performance PLC platform designed for advanced automation, digitalized production lines, and highly integrated industrial systems.

This family now forms the core of Siemens automation, focused on:

⚡ High computing power

🎯 Integrated motion control

🔐 Native cybersecurity

🧠 Advanced diagnostics

🔗 Full integration in TIA Portal

SIMATIC S7-400: the Siemens platform for complex automation and high-reliability processes

In the Siemens industrial automation landscape, SIMATIC S7-400 represents the modular PLC platform designed for large-scale applications, complex plants, and high-availability architectures.

Unlike compact or mid-range modular series, the S7-400 family is built for environments where the following are required:

⚙️ high processing capacity

🧩 extensive modularity

🔁 redundancy

🔗 process integration

📊 management of large volumes of I/O signals

SIMATIC S7-300: the Siemens PLC platform that defined a global standard in industrial automation

In the industrial automation landscape, SIMATIC S7-300 is one of the most widespread and long-standing series developed by Siemens.

For many years, it has represented the technical benchmark for:

⚙️ modular automated lines

🏭 complex industrial plants

🧩 special-purpose machines

🔗 integrated process systems

Even today, thousands of plants worldwide operate with S7-300 architectures, making this family central to maintenance, retrofit, and production continuity.

SIMATIC S7-200: the compact Siemens series that made modular industrial automation accessible

Within the world of Siemens industrial automation, SIMATIC S7-200 represents one of the most widely used and long-lasting series for controlling compact machines, simple systems, and decentralized applications.

This family was developed to provide a compact, reliable, and easily integrable PLC, maintaining Siemens logic even in contexts where more complex modular architectures such as S7-300 or S7-400 were not required.

Even today, thousands of machines worldwide still use S7-200 controllers, making this series highly sought after for maintenance activities, retrofit projects, and production continuity.

SIPLUS and 6AG roots: Siemens ruggedized products in the SIMATIC S7 ecosystem

In the world of modern industrial automation, alongside the standard SIMATIC S7 family, there is a range designed to operate under harsher environmental conditions: SIPLUS, a line developed by Siemens to provide reinforced, protected, and industrially extended versions of key SIMATIC components.

These products are mainly identified in the Siemens catalogue by the 6AG prefix, which represents one of the most important roots within the S7-oriented ecosystem

SIMATIC S5: the Siemens PLC system that shaped the history of industrial automation

The world of modern industrial automation also originates from platforms that are now considered legacy systems, yet they continue to operate in thousands of production plants still fully active today.

Among these, one of the most important families is undoubtedly SIMATIC S5, the historic PLC platform developed by Siemens, which for many years represented an international benchmark in industrial process control.

Even today, many production lines still use: S5 controllers, I/O modules, power supply units, CPU modules, operator panels connected to this architecture

making the availability of technical expertise for maintenance and production continuity essential.

SINAMICS multi-series / generic components – Cross-series accessories and spare parts (6SL3000)

The 6SL3000 root identifies a fundamental category within the Siemens SINAMICS range: accessories, generic components, chassis, and cross-series spare parts usable across multiple drive families depending on the variant and configuration.

These components do not belong to a single series but play a transversal role in the SINAMICS ecosystem, supporting installation, integration, maintenance, and operational continuity of the plants.