PLC Modules S7 1200 and S7 1500

  

SIMATIC S7-1200 PLC'S

Chapter - 12

  • SIMATIC S7-1200 PLC'S have a compact configuration and can be used in a wide variety of applications. S7-1200 CPU models range from CPU 1211C to CPU 1217C.
  • All S7-1200 CPU models incorporate in a compact housing an integrated power supply, on- board digital input and output circuits, on board analog input circuits, one or two built-in PROFINET ports, and high-speed motion control I/O.
  • A signal board, battery board, or communication board can be added to the CPU without affecting the size of the CPU.
  • When additional I/ O is required beyond what is available on board and with the addition of a signal board, S7-1200 CPU'S, except CPU 1211C, allow signal modules to be mounted to the right.

  • CPU 1212C permits the addition of two signal modules, and the remaining CPU'S permit the addition of eight(8) signal modules.
  • All CPU'S have at least one built-in PROFINET port, CPU 1215C and CPU 1217C have two(2) PROFINET ports, and all CPU'S can be equipped with up to three(3) communication modules mounted to the left of the CPU.
  • All S7-1200 modules have built-in clips that allow easy and convenient mounting on a standard 35 millimetre DIN rail.
  • These built-in clips can also be snapped into an extended position to provide mounting holes for panel mounting.
  • Signal modules have a bus connector on the front. Once a module is in place, the bus connector is moved to the left to allow the module to communicate with the CPU

SIMATIC S7-1500 PLC'S

  • SIMATIC S7-1500 PLC'S provide extremely fast response times for optimal control quality and the highest system performance SIMATIC S7-1500 CPU'S are available in Standard and Fail safe (F) versions.

  • Standard S7-1500 CPU'S range from CPU 1511-1 PN for small to medium-sized applications to CPU 1518-4 PN/DP for the most demanding requirements.
  • The accompanying graphic shows CPU 1516-3 PN/DP S7-1500 PLC'S have a salable configuration that incorporates a CPU, at least one system power supply module, multiple signal modules, and other modules as needed.
  • The mounting rail can be extended to include up to 32 modules.
  • All S7-1500 CPU models feature an attached display for commissioning and diagnostics and have built-in PROFINET ports that permit the full range of PROFINET communication, including the high performance PROFINET IRT communication, needed for advanced motion control applications.
  • In addition, some CPU'S also have one or two built-in PROFIBUS DP ports.


  • When additional PROFINET or PROFIBUS ports are required or when point-to-point communications is needed, optional communication modules are available.
  • S7-1500 Fail safe CPU'S, are used in applications where it is essential to guarantee the functional safety of machines or plants.

SIMATIC ET 200 with Integrated CPU

  • Some SIMATIC ET 200 systems, ET 200S and ET 200pro for example, can include an interface module with an integrated CPU.
  • The addition of a CPU makes an ET 200 a modular PLC


  • Using a distributed I/O station with integrated CPU relieves the central PLC of some control tasks and allows the central PLC to run a shorter, simpler program.
  • At the same time, it improves system performance by reducing response time for the distributed I/O station.
  • When properly designed, this approach can also simplify troubleshooting.
  • SIMATIC ET 200S is a Multi functional, Highly modular, compact I/O system.
  • It has a rugged construction, allowing it to be used in conditions of high mechanical stress.


  • Interface modules for this system in standard and fail safe designs are available with or without an integrated CPU.
  • The interface modules with integrated CPU can be used both in stand-alone mode and for distributed automation solutions with a medium-sized program.
  • Depending on the version, PROFIBUS DP and/or PROFINET ports are available.
  • SIMATIC ET 200pro is a small, extremely rugged, and high-performance I/O system with IP65, P66, or IP67 protection.
  • It does not require a control cabinet and can be mounted directly on the machine.
  • Interface modules for this system are available in standard and fail safe designs with or without an integrated CPU.

  • The integrated CPU is based on the S7-300 CPU 315-2 PN/DP, is compatible with S7-300 programs, and has PROFINET and PROFIBUS DP ports.


Chapter 13 we will discuss about Inputs and Outputs


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