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S7-400 CPU,The CPU range of the SIMATIC S7-400 meets all demands of the medium and upper performance range. Various integrated interfaces and additional failsafe controllers make the S7-400 suitable for a wide range of possible automation tasks.

There is a graded range of CPUs from the entry-level CPU right up to the high-performance CPU for configuring the controller. All CPUs control large quantity structures; several CPUs can work together in a multicomputing configuration to boost performance. Thanks to their high processing speed and deterministic response times, the CPUs enable short machine cycle times.The different CPUs are distinguished by, for example, work memory, address range, number of connections and execution time. As well as the standard CPUs, there are also two failsafe and three fault-tolerant CPUs available.

With the Version 7 the continuous advancement of the series will be continued. Among others, storage, performance and quantity structure have been innovated. Furthermore the focus was on the new expansion of the Profinet communication performance.

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Applications

S7-400 finds successful application here:

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Benefit

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Design

An S7-400 system basically comprises a rack, power supply, and central processing unit. It can be installed and expanded in a modular way. All modules can be positioned freely next to the power supply plugged in on the left. The S7-400 has a rugged design without a fan. Signal modules can be hotswapped.A multi-faceted module range can be used for central expansions as well as for simple configuration of distributed topologies with ET 200.
In a centralized expansion, additional mounting racks are connecteddirect to the central controller.

In addition to the standard mounting racks, aluminum mounting racks with 9 and 18 slots are also available. These aluminum racks are highly resistant to unfavorable environmental conditions, and they are more rigid and around 25% lighter.

Multicomputing

Multicomputing, that is, the simultaneous operation of several CPUs in one S7-400 central controller, offers users different benefits:

In multicomputing operation, all CPUs behave like a single CPU, that is, when one CPU goes to STOP, the others are also halted. The actions of several CPUs can be coordinated selectively by instruction via synchronization calls.In addition, data exchange between the CPUs takes place at an extremely high speed via the “global data” mechanism.

Data/program memory

The size of the work memory is determined CPU that can be selected from a finely graded range of CPUs.The integral load memory (RAM) is sufficient for small to mediumsized programs. For larger programs, the load memory is enlarged by plugging in RAM or FEPROM memory cards (64 KB to 64 MB).
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Special functions

The S7-400 CPUs have some highly useful special functions:

An integrated data record gateway permits integrated accessto data records across different bus systems and networkboundaries e.g. a control-level PC can communicate via PROFINETwith a lower-level S7-400 controller and the field devicesconnected to it via PROFIBUS.
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Description

The CPU range of the SIMATIC S7-400 meets all demands of the medium and upper performance range. Various integrated interfaces and additional failsafe controllers make the S7-400 suitable for a wide range of possible automation tasks.
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SIMATIC S7-400 CPU 412-1

Entry CPU for applications of the medium performance range

  • RAM 288 KB
  • MPI/PROFIBUS DP-Master-interface
  • Memory Card slot

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SIMATIC S7-400 CPU 412-2

CPU with a medium program memory and quantity framework

  • RAM 512 KB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • Memory Card slot

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SIMATIC S7-400 CPU 412-2 PN

CPU with a medium program memory and quantity framework and additional communication tasks

  • RAM 1 MB
  • MPI/PROFIBUS DP-Master-Interface
  • 2 additional PROFINET ports
  • Memory Card slot

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SIMATIC S7-400 CPU 414-2

CPU for more demanding applications of the medium performance range

  • RAM 1 MB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • Memory Card slot

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SIMATIC S7-400 CPU 414-3

CPU for more demanding applications of the medium performance range and additional communication tasks

  • RAM 2.8 MB
  • MPI/PROFIBUS DP-Master-Interface
  • 2 additional PROFIBUS DP-Interfaces
  • Slot for additional IF-Module
  • Memory Card slot

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SIMATIC S7-400 CPU 414-3 PN/DP

CPU for more demanding applications of the medium performance range and additional PROFINET functionality

  • RAM 2.8 MB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • additional PROFINET Interface
  • Slot for additional IF-Module
  • Memory Card slot

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SIMATIC S7-400 CPU 416-2

Entry CPU for the upper performance range

  • RAM 5.6 MB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • Memory Card slot

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SIMATIC S7-400 CPU 416F-2

Failsafe entry CPU for the upper performance range

  • RAM 5.6 MB
  • MPI/PROFIBUS DP-Master-Interface
  • Memory Card slot
  • additional PROFIBUS DP-Interface
  • complies with safety requirements up to SIL 3 to IEC 61508 and up to Cat. 4 according to EN 954-1

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SIMATIC S7-400 CPU 416-3

Standard CPU for the upper performance range and additional communication tasks

  •  RAM 11.2 MB
  • MPI/PROFIBUS DP-Master-Interface
  • 2 additional PROFIBUS DP-Interfaces
  • Slot for additional IF-Module
  • Memory Card slot

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SIMATIC S7-400 CPU 416-3 PN/DP

Standard CPU for the upper performance range with PROFINET functionality

  • RAM 11.2 MB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • additional PROFINET Interface
  • Slot for additional IF-Module
  • Memory Card slot

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SIMATIC S7-400 CPU 416F-3 PN/DP

Failsafe CPU for the upper performance range with PROFINET functionality

  • RAM 11.2 MB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • additional PROFINET Interface
  • Slot for additional IF-Module
  • Memory Card slot
  • complies with safety requirements up to SIL 3 to IEC 61508 and up to Cat. 4 according to EN 954-1

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SIMATIC S7-400 CPU 416F-3 PN/DP

Failsafe CPU for the upper performance range with PROFINET functionality

  • RAM 11.2 MB
  • MPI/PROFIBUS DP-Master-Interface
  • additional PROFIBUS DP-Interface
  • additional PROFINET Interface
  • Slot for additional IF-Module
  • Memory Card slot
  • complies with safety requirements up to SIL 3 to IEC 61508 and up to Cat. 4 according to EN 954-1

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SIMATIC S7-400 CPU 417-4

High End CPU for the upper performance range and additional communication tasks

  • RAM 30 MB
  • MPI/PROFIBUS DP-Master-Interface
  • 3 additional PROFIBUS DP-Interfaces
  • 2 slots for additional IF-Modules
  • Memory Card slot

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