Siemens SIMATIC Industrial Automation Systems Basic Controllers S7-1200

Basic Controllers

Basic controllers

Basic controllers are the intelligent choice for applications in the low to mid-performance range. They are available in standard and safety versions. The integrated inputs and outputs as well as the integrated technology functions facilitate both compact and cost-effective solutions. With basic controllers, flexible solutions for simple networking with integrated and optional communication connections can be implemented.

Basic controllers are configured and programmed in the Totally Integrated Automation Portal (TIA Portal). You therefore benefit from maximum engineering efficiency, and as applications increase in complexity, you can easily transfer them to Advanced Controllers.

Siemens Basic Controllers S7-1200

S7-1200 Overview

  • Compact controllers for the low to mid-performance ranges
  • Large-scale integration, space-saving, powerful
  • With exceptional real-time performance and powerful communication options:
    • Controller with integrated PROFINET IO Controller interface for communication between SIMATIC controllers, HMI, programming device or other automation components
  • All CPUs can be used in stand-alone mode, in networks and within distributed structures
  • Extremely simple installation, programming and operation
  • Integrated web server with standard and user-specific web pages
  • Data logging functionality for archiving of data at runtime from the user program
  • Powerful, integrated technology functions such as counting, measuring, closed-loop control, and motion control
  • Integrated digital and analog inputs/outputs
  • Flexible expansion facilities
    • Signal boards for direct use in a controller
    • Signal modules for expansion of controllers with input/output channels;
      including an Energy Meter module for recording and preparing energy data
    • Accessories, e.g. power supply, switch module or SIMATIC Memory Card


The SIMATIC S7-1200 is the controller for open-loop and closed-loop control tasks in mechanical equipment manufacture and plant construction.

Due to the compact modular design with a high performance at the same time, the SIMATIC S7-1200 is suitable for a wide variety of automation applications. Its range of use extends from the replacement of relays and contactors up to complex automation tasks in networks and within distributed structures.

The S7-1200 also increasingly opens up areas for which special electronics was previously developed for economical reasons.

Application examples include, for example:

  • Placement systems
  • Conveyor systems
  • Elevators and escalators
  • Material transportation equipment
  • Metalworking machinery
  • Packaging machines
  • Printing machines
  • Textile machines
  • Mixing systems
  • Freshwater treatment plants
  • Wastewater treatment plants
  • External displays
  • Electricity distribution stations
  • Room temperature control
  • Heating/cooling system control
  • Energy management
  • Fire protection systems
  • Air conditioning
  • Lighting control
  • Pump control
  • Security/access control systems


The S7-1200 is characterized by:

  • Easy getting started:
    Special starter packages including simulators and documentation facilitate familiarization.
  • Uncomplicated operation:
    Powerful standard commands which are simple to use, together with the user-friendly programming software, reduce the programming overhead to a minimum.
  • Real-time properties:
    Special interrupt functions, fast counters, and pulse outputs permit use even with time-critical processes.

The SIMATIC S7-1200 meets national and international standards:

  • UL 508
  • CSA C22.2 No. 142
  • FM Class I, Div 2, Groups A, B, C, D; T4A Class I, Zone 2, IIC, T4
  • VDE 0160
  • EN 61131-2
  • Requirements of the EMC directive in accordance with EN 50081-1, 50081-2 and 50082-2


The SIMATIC S7-1200 family consists of the following modules:

  • Compact controllers with graded performances in different versions as wide-range AC or DC controllers.
  • Signal boards (analog and digital) for low-cost modular controller expansion directly on the CPU, with retention of the mounting space.
  • Different digital and analog signal modules.
  • Different communication modules and processors.
  • Ethernet switch with 4 ports for implementation of many different network topologies
  • SIWAREX weighing systems terminal module
  • PS 1207 stabilized power supply units, line voltage 115/230 V AC, rated voltage 24 V DC

Mechanical features

  • Easy mounting of the modules on a standard DIN rail or in a control panel
  • Rugged, compact plastic enclosure
  • Easily accessible connection and control elements, protected by front flaps
  • Removable connection terminals, also for analog or digital expansion modules

Device features

  • International standards:
    SIMATIC S7-1200 complies with the standards according to VDE, UL, CSA and FM (Class I, Category 2; Danger zone groups A, B, C and D, T4A). The quality management system used during production is certified according to ISO 9001.

The SIMATIC S7-1200 is equipped with different communication mechanisms:

  • Integrated PROFINET IO Controller interface
  • Communication module with PROFIBUS DP master interface
  • Communication module with PROFIBUS DP slave interface
  • GPRS module for connection to GSM/G mobile phone networks
  • LTE module for communication in mobile phone networks of the fourth LTE generation (Long Term Evolution).
  • Communications processor for connection to TeleControl Server Basic control center software control center software via Ethernet, and for safe communication via IP-based networks.
  • Communications processor for connection to control centers for telecontrol applications.
  • RF120C for connection to SIMATIC Ident systems.
  • Module SM1278 for connecting IO-Link sensors and actuators.
  • Point-to-point connection via communication modules.

PROFINET interface

The integral PROFINET interface permits communication with:

  • Programming device
  • HMI devices
  • Other SIMATIC controllers
  • PROFINET IO automation components

The following protocols are supported:

  • TCP/IP
  • ISO-on-TCP
  • S7 communication

The following can be connected:

  • Field PG programming device and PCs via standard CAT5 cable.

Connection between PG and CPU of SIMATIC S7-1200

  • SIMATIC HMI Basic Panels

Connection between Basic Panel and CPU of SIMATIC S7-1200

  • Further SIMATIC S7-1200 controllers

Connection of several devices via CSM 1277 Ethernet switch

Point-to-point interface, freely-programmable interface mode

Communication modules permit communication via point-to-point connections. The RS 232 and RS 485 physical transmission media are used. Data transmission is carried out in the “Freeport” mode of the CPU. A user-specific, bit-oriented communication protocol is used (e.g. ASCII protocol, USS, or Modbus).

Any terminal equipment with a serial interface can be connected, e.g. drives, printers, bar code readers, modems, etc.

Point-to-point connection via CM 1241 in programmable interface mod

SIMATIC S7-1200 Controllers Technical specifications

General technical specifications

Degree of protection

IP20 acc. to IEC 529

Ambient temperature

  • Operation
    (95% humidity)
  • Horizontal installation

-20 … +60 °C

  • Vertical installation

-20 … +50 °C

  • Transportation and storage

-40 … +70 °C

  • With 95% humidity

25 … 55 °C


  • 5/24 V DC circuits

500 V AC test voltage

  • 115/230 V AC circuits to ground

1500 V AC test voltage

  • 115/230 V AC circuits to 115/230 V AC circuits

1500 V AC test voltage

  • 230 V AC circuits to 5/24 V DC circuits

1500 V AC test voltage

  • 115 V AC circuits to 5/24 V DC circuits

1500 V AC test voltage

Electromagnetic compatibility

Requirements of the EMC directive

  • Noise immunity acc. to
    EN 50082-2

Test acc. to:
IEC 801-2, IEC 801-3, IEC 801-4, EN 50141, EN 50204, IEC 801-5, VDE 0160

  • Emitted interference acc. to EN 50081-1 and
    EN 50081-2

Test according to
EN 55011, Class A,
Group 1

Mechanical strength

  • Vibrations, test acc. to / tested with

IEC 68, Part 2-6:
10 … 57 Hz;
constant amplitude
0.3 mm;
58 … 150 Hz;
constant acceleration 1 g (mounted on DIN rail) or
2 g (mounted in switchboard);
mode of vibration:
frequency sweeps with a sweep rate of 1 octave/minute;
duration of vibration:
10 frequency sweeps per axis in each direction of the three mutually perpendicular axes

  • Shocks, test acc. to / tested with

IEC 68, Part 2-27/half-sine:
magnitude of shock 15 g (peak value), duration 11 ms, 6 shocks in each of the three mutually perpendicular axes