Compact controllers for the low to mid-performance ranges


The modular SIMATIC S7-1200 controller is at the core of our offering for simple but highly precise automation tasks. The SIMATIC S7-1200 controller is modular and compact, versatile, a secure investment, and is perfectly suited to a whole range of applications.

The S7-1200 CPUs with Safety Integrated handle both standard and safety-related tasks.
A compact design with integrated IO, communication interfaces that meet the highest industry requirements and a range of powerful integrated technological functions make this controller an integral part of a comprehensive automation solution.

Expanding the system by using special modules
Technology module
  • Condition monitoring
    • SIPLUS CMS1200 : Compact and integrated Condition Monitoring
  • Weighing Modules
    • SIWAREX WP231 is the optimum solution wherever load cells are used for measuring tasks.
    • SIWAREX WP241 is the optimal solution wherever belt scales are used that demand high accuracy, high user-friendliness, and flexible system integration. 
    • SIWAREX WP251 is a flexible weighing module for fast and precise dosing and filling processes.
  • Others
    • SM 1238 – Energy Meter 480VAC : recording in 1- and 3-phase networks(TN, TT) up to 480 V AC; ampere current: 1 A, 5 A
    • RF120C communication module all SIMATIC identification systems
    • CM 1243-2 AS-i Master
    • SM 1278 IO-Link Master
    • CP 1243-1 communications processor for DNP3, IEC 60870-5-104
    • BB 1297 battery board
    • SIM 1274 Input Simulator Modules
Signal/Comm. Board

Signal boards are connected directly to the front of the CPU. They can be used where space is limited or if only a few additional inputs/outputs are required.

  • SB 1221 – Digital Inputs
  • SB 1222 – Digital Outputs
  • SB 1223 – Digital I/O
  • SB 1231 – Analog inputs
  • SB 1232 – Analog outputs
  • CB 1241 – Communication (RS485)

Expanding the CPUs by using additional I/O
Signal module

The central processing units of the SIMATIC S7-1200 are designed as Compact CPUs with integrated I/Os. Their modular design can be used to increase the configuration limits or to adapt the controller to new tasks: through mounting a Signal Board on the CPU or adding separate signal modules.

  • Digital IO Modules
    • SM 1221 – Digital input modules
    • SM 1222 – Digital output modules
    • SM 1223 – Digital hybrid modules (Mixed input/output)
  • Analog IO Modules
    • SM 1231 – Analog input modules
    • SM 1232 – Analog output modules
    • SM 1234 – Analog hybrid modules (Mixed input/output)
    • SM 1238 – Energy Meter 480VAC : recording in 1- and 3-phase networks(TN, TT) up to 480 V AC; ampere current: 1 A, 5 A
  • Failsafe IO Modules
    • The Fail safe signal  modules for digital inputs and outputs (DI and DQ) correspond to the standard modules with respect to their size. Their functional safety is certified according to EN 61508. They are designed for safety-related use up to SIL 3 according to EN 62061 and PL e according to ISO 13849.
Communication modules
Communication module

The integrated PROFINET interface in SIMATIC S7-1200 can be used for programming the CPU and for communication with SIMATIC HMI Basic Panels for visualization, but also for communication with other controllers or IO devices such as drives.

  • Simple Communication Modules
    • Serial communication : CM 1241 RS232 or RS422/RS485
    • Integration of identification systems : RF120C communication module all SIMATIC identification systems
  • PROFIBUS Modules
    • CM 1243-5 DP master
    • CM 1242-5 DP slave
  • AS-Interface
    • CM 1243-2 AS-i Master
  • IO-Link Master
    • SM 1278 IO-Link Master
  • Telecontrol Modules
    • The GPRS CP 1242-7 enables SMS messaging for event driven fault diagnostics using general packet radio service (GPRS).. Additional full Teleservice functionally can be realized for remote diagnostics, configuration & programming.
    • CP 1243-7 LTE is used to connect the S7-1200 to a mobile wireless 4th generation LTE (Long Term Evolution) network. The increased data rates compared to GPRS and widespread introduction of LTE open up new areas of application.
    • The CP 1243-1 communications processor is used for connecting the SIMATIC S7-1200 to telecontrol centers via remote networks and telecontrol protocols (DNP3, IEC 60870-5-104, TeleControl Basic), and for safe communication via IP-based networks.
    • The CP 1243-8 IRC (Industrial Remote Communication) communications processor is used for connecting a SIMATIC S7-1200 via the SINAUT ST7 telecontrol protocol to higher-level ST7 stations or to an ST7 control center.
System overview
SIMATIC S7-1200 – Be flexible thanks to networking possibilities

SIMATIC S7-1200 controllers are the ideal choice when it comes to flexibly and efficiently performing automation tasks in the lower to medium performance range. They feature a comprehensive range of technological functions and integrated communication as well as especially compact and space-saving design.

  • Efficient engineering
    • TIA portal provides you with complete access to the entire digitalized automation system, from digital planning to integrated engineering to transparent operation. Simulation tools decrease the time-to-market, diagnostic and energy management functions increase productivity of your plant, and you enjoy greater flexibility and transparency thanks to connect to the management level.
  • Dedicated Functionalities : Individually expandable
    • SIMATIC S7-1200 has dedicated modules which increase the CPU added value offering specific automation tasks
      • Energy meter
      • Condition Monitoring System
      • Weighing system SIWAREX
  • Scalability : Programing compatibility
    • SIMATIC S7-1200 und S7-1500 share the same engineering framework TIA Portal, so in case of reach the maximum possibilities of SIMATIC S7‑1200 it is possible to make a simple controller upgrade to SIMATIC S7‑1500, no migration effort is needed.
  • Flexibility : Take control of communication
    • Communication modules increase the versatility of SIMATIC S7-1200 offering several open communication protocols as serial communication, PROFIBUS, IO-Link, AS‑Interface, PROFINET, Industrial Ethernet, Telecontrol as well as innovative vertical and horizontal protocols as MQTT and OPC UA providing massive storage and data analisis system possibilities. Those attributes are the best foundation for digitalization and are the drivers of new applications and business models such as predictive maintenance or machine learning.
      • Cloud Connect
      • OPC UA
      • Web Server
  • Security Integrated : Protection concept for the controller
    • The security concept of SIMATIC S7-1200 includes communication integrity. Security Integrated protects your investments, helps prevent the reproduction of machines, and helps to ensure a high level of plant availability.
  • Safety Integrated : Highest machine safety
    • One system for standard and fail-safe applications: One controller, one communication system, and one engineering environment for standard and fail-safe automation. Safety Integrated means the easy connection of PROFIsafe devices via PROFIBUS and PROFINET, and data consistency between standard and fail-safe program components. It offers support for mixed option using fail-safe and standard I/O assemblies.
  • Edge Integration : The vision of smart data analytics
    • Industrial Edge Computing is seamlessly integrated into SIMATIC S7‑1200 by using a technology module as platform for multiple functions: Based on SIMATIC Industrial OS, the SIMATIC S7‑1500 technology module TM MFP is prepared for Siemens Industrial Edge applications on the control level thanks to Edge runtime. Connected via Ethernet and scalably to any SIMATIC S7-1200 CPU, the multifunctional platform thus combines the advantages of a cloud with the strengths of a local solution and allows various data collecting and optimization concepts: local, cloud-based and hybrid.

Technical Specification

General technical specifications
Degree of protectionIP20 acc. to IEC 529
Ambient temperature 
(95% humidity)
– Horizontal installation-20 … +60 °C
– Vertical installation-20 … +50 °C
Transportation and storage-40 … +70 °C
– With 95% humidity25 … 55 °C
Electromagnetic compatibilityRequirements 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
5/24 V DC circuits500 V AC test voltage
115/230 V AC circuits to ground1500 V AC test voltage
115/230 V AC circuits to 115/230 V AC circuits1500 V AC test voltage
230 V AC circuits to 5/24 V DC circuits1500 V AC test voltage
115 V AC circuits to 5/24 V DC circuits1500 V AC test voltage
Mechanical strength 
Vibrations, test acc. to / tested withIEC 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 withIEC 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

Standard CPUs

General performance

CharacteristicsCPU 1211CCPU 1212CCPU 1214CCPU 1215CCPU 1217C
VariantsDC/DC/DC, AC/DC/relay, DC/DC/relay
Work memory, integrated50 KB75 KB100 KB125 KB150 KB
Load memory, integrated1 MB2 MB4 MB4 MB4 MB
Memory card(optional)
Digital inputs/outputs, integrated6/48/614/1014/1014/10
Analog inputs, integrated22222
Analog outputs, integrated00022
Process image1024 bytes for inputs, 1024 bytes for outputs
Expansion by signal boardMax. 1Max. 1Max. 1Max. 1Max. 1
Expansion by signal modulesNoMax. 2Max. 8Max. 8Max. 8
Expansion by communication modulesMax. 3Max. 3Max. 3Max. 3Max. 3

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