S7 400
S7 400

The power PLC for the mid to high-end performance ranges.

The solution for even the most demanding tasks.

With a comprehensive range of modules and performancegraded CPUs for optimal adaptation to the automation task.

Flexible in use through simple implementation of distributed structures; user-friendly connections.

Optimal communication and networking options.

User-friendly handling and uncomplicated design without a fan.

Can be expanded without problems when the tasks increase.

Multicomputing: Simultaneous operation of several CPUs in one S7-400 central controller. Multicomputing distributes the overall performance power of an S7-400. For example, complex tasks can be divided into technologies such as open-loop control, computing or communication, and assigned to different CPUs. And every CPU can be assigned its own local I/O.

Modularity: The powerful backplane bus of the S7-400 and the communication interfaces that can be connected direct to the CPU enable high-performance operation of a host of communication lines. This enables, for example, division into one communication path for HMI and programming tasks, one for high-performance and equidistant motion control components, and one for a "normal" I/O fieldbus. Additionally required connections to MES/ERP systems or the Internet can also be implemented.

Engineering and diagnostics: The S7-400 is configured and programmed extremely efficiently together with the SIMATIC Engineering Tools particularly in the case of extensive automation solutions with a high engineering component. For this purpose, high-level languages such as SCL and graphical engineering tools for sequential controls, state graph programs and technology-oriented diagrams are available, for exampl


Fault-tolerant automation system with redundant design.

For applications with high fail-safety requirements. Processes with high restart costs, expensive downtimes, little supervision, and few maintenance options.

Redundant central functions.

Increases availability of I/O: switched I/O configuration.

Also possible to use I/Os with standard availability: singlesided configuration.

Hot stand-by: automatic reaction-free switching to the standby unit in the event of a fault.

Configuration with two separate or one divided central rack.

Connection of switched I/O via redundant PROFIBUS DP


Failsafe automation system for plants with increased safety requirements

Complies with safety requirements to SIL 3 in accordance with IEC 61508, AK6 in accordance with DIN V 19250 and Cat. 4 in accordance with EN 954-1

If required, also fault tolerant through redundant design

Without additional wiring of the safety-related I/O:

Safety-relevant communication via PROFIBUS DP with PROFIsafe profile

Based on S7-400H and ET 200M with fail-safe modules

Standard modules for non-safety-related applications can also be used in the automation system

Isolation module for joint use of fail-safe and standard modules in safety mode in one ET 200M