SIEMENS SIMATIC ET 200MP Overview/Benefits/Application/Design/Function

SIMATIC ET 200MP Overview

The SIMATIC ET 200MP is a modular and scalable I/O system with IP20 degree of protection for universal use, and offers the same system advantages as the S7-1500. The SIMATIC ET 200MP permits extremely short bus cycles and very fast response times, even with large quantity structures.SIMATIC ET 200MP

SIMATIC ET 200MP consists of the following components:

  • Interface module for connecting S7-1500 I/O modules to PROFINET; up to 30 modules can be connected to one interface module
  • Interface module for connecting S7-1500 I/O modules to PROFIBUS; up to 12 modules can be connected to one interface module

The SIMATIC ET 200MP distributed I/O system is particularly easy to install, wire, and commission.


  • Modular I/O system with IP20 protection for PROFINET or alternatively for PROFIBUS
  • Compact dimensions
  • High degree of user-friendliness due to the following design features:
    • Uniform 40-pin front connector simplifies ordering, logistics, and warehousing
    • Uniform pin assignment per module type simplifies wiring and helps avoid errors
    • Integrated potential bridges simplify wiring and allow flexible subsequent modification
    • The cable storage space grows along with the requirements and allows a uniform appearance even with insulated conductors with a large cross-section and/or thick insulation
    • The pre-wiring position for the front connector allows convenient wiring both when commissioning and making changes during operation
    • The top hat rail integrated in the S7-1500 DIN rail allows snapping-on of many standard components such as additional terminals, miniature circuit breakers or small relays
    • The 1:1 allocation of channel status and diagnostics LED, terminal and inscription allows fast location and elimination of errors. Assistance is provided by the wiring diagram printed on the inside of the front panels
    • The integrated shielding concept for analog and technology modules allows reliable and rugged operation, in particular with high-speed applications. Installation does not require any tools
    • Particularly space-saving and simple design with slim 25 mm modules;
      the maximum possible station configuration with power supply (PS), interface module (IM) and 30 I/O modules can be accommodated on a 830 mm-wide S7-1500 DIN rail
  • Comprehensive product portfolio comprising digital and analog input or output modules, technology modules, and communication modules for point-to-point communication; further modules, e.g. F-modules, will be available soon
  • Extensive system functions
    • Integrated system diagnostics when operated with an S7-1500 and the TIA Portal
    • Increased communication availability by using Media Redundancy Protocol (MRP) on the PROFINET;
      in addition, the IM 155-5 PN HF High Feature interface module can be operated on an S7-400H. Configuration is carried out with STEP 7 V5.5 SP3 and a GSDML file. The IM 155-5 PN HF also supports operation on an S7-400H CPU (system redundancy)
    • Consistent use of identification and maintenance data IM0 to IM3 for fast electronic and unambiguous identification of individual modules (Article No., serial number, etc.)
    • Uniform firmware update for the interface module and all I/O modules for subsequent expansion of functions (investment security)
    • Bus cycle time ≥ 250 µs and coupling to the isochronous task permit implementation of applications with high performance requirements with PROFINET
    • Up to 30 I/O modules (PROFINET) or 12 I/O modules (PROFIBUS) within a station save on interface modules and installation time
    • MMC not required with PROFINET; automatic address assignment via LLDP or manually via TIA Portal or PST tool
    • Shared device on up to two (IM 155-5 PN BA and IM 155-5 PN ST) or four (IM 155-5 PN HF) IO Controllers
    • Module shared input / module shared output as system function for all S7-1500 I/O modules


SIMATIC ET 200MP is a multifunctional distributed I/O system for a wide range of applications. Thanks to its scalable design, you can gear the I/O station exactly to the on-site requirements. SIMATIC ET 200MP is approved for the IP20 degree of protection and designed for installation in a control cabinet. Using the PROFIBUS interface module, the ET 200MP can also be integrated into existing systems without any problems.


SIMATIC ET 200MP features a variable and scalable station design. The maximum configuration is 30 I/O modules with max. 512 input bytes and max. 512 output bytes per station.

The compact dimensions of the SIMATIC ET 200MP mean that it can be fitted without any problems in the existing mounting space of a SIMATIC S7-300 or ET 200M.

The overall width of the interface module and the individual I/O modules is 35 mm, modules with a width of 25 mm are also available.

The ease with which the modules can be joined using a U-connector saves time during installation. Installation is on an S7-1500 aluminum rail. This can be ordered in various lengths, including a 2-meter rail which you can shorten as desired to optimally use the space available. The integrated DIN rail allows snapping-on of many standard components such as additional terminals, miniature circuit breakers or small relays.

The I/O signals are connected via a 40-pin front connector. This permits the connection of wires with a cross-section from 0.25 mm2 to 1.5 mm2 (AWG 24 to AWG 16). Front connectors with screw-type terminals and push-in terminals are available for 35-mm modules; front connectors with push-in terminals are available for 25-mm modules.

To allow simple wiring of the front connector, it can be set to a “prewiring position”. In this position, the connector does not yet have any contact with the module. This position can also be used to make changes during operation. The user is supported by a printed cabling diagram on the inside of the front flap.

The mechanical coding prevents destruction of the electronics by accidental incorrect insertion. The result is a more failsafe system.

The IM155-5 PN ST and IM 155-5 PN HF interface modules of the ET 200MP are designed such that a station can be equipped with up to 12 I/O modules. By adding a system power supply (PS), up to 30 I/O modules can be operated within one station. Simple retrofitting of I/O modules is thus possible without having to adapt and reconfigure the PROFINET network.

A system power supply (PS) is not required for the interface modules IM155-5 DP ST (PROFIBUS) and IM 155-5 PN BA (PROFINET). Here, up to 12 I/O modules can be operated within a station.

Labeling strips are available for the I/O modules of the SIMATIC ET 200MP. These DIN A4 sheets can be printed using a standard laser printer. An automatic printout can be produced from the TIA portal without having to reenter the symbols or addresses. The labeling strips are designed such that the assignment between the inscription and the channel or diagnostics display is 1:1. This 1:1 assignment between the inscription and the terminal is retained when the front flap is opened.

Interface module

The interface module connects SIMATIC ET 200MP to PROFINET or PROFIBUS and exchanges data between the higher-level controller and the I/O modules.

I/O modules

The following module types are available for use on a SIMATIC ET 200MP:

  • Digital input modules; 16 or 32 channels; 24 V DC; 230 V AC; sinking/sourcing input; universal wide range module from 24 V … 125 V
  • Digital output modules; 8, 16 or 32 channels; 24 V DC; 230 V AC; rated current 0.5 A, 1 A, 2 A or 5 A per channel; universal wide range module from 24 V … 125 V
  • Analog input modules; 4 or 8 channels; measurement types: current, voltage, resistance, resistance thermometer; thermocouple
  • Analog output modules; 2, 4 or 8 channels; output ranges: current, voltage
  • Of particular note are the high-speed (HS) analog modules with an extremely short conversion time of 62.5 µs (AI) or 125 µs (AQ) for 8 channels
  • Technology modules for counting and positioning
  • Communication modules for point-to-point communication
  • Available soon: F modules for safety-instrumented applications

Various module classes are available to provide users with optimum scalability in their application. The modules themselves are labeled accordingly:

  • BA (Basic): Simple, cost-effective modules, without diagnostics and without parameters
  • ST (Standard): Modules with module-granular or load group-granular diagnostics and with parameters if applicable; for analog modules: Accuracy class 0.3 %
  • HF (High Feature): Modules with channel-granular diagnostics and parameter settings; for analog modules: Accuracy class 0.1 %, increased immunity and galvanic isolation
  • HS (High Speed): Modules with extremely short filter and conversion times for very fast applications; e.g. 8-channel analog modules with a conversion time of 125 µs
Advanced functions

Some modules feature extended functions which facilitate simple and low-cost entry into the technology functions.

The two High Feature digital input modules enable simple acquisition of count pulses with a frequency of up to 1 kHz on two of the 16 or 32 inputs.

The 2 A digital output module has two channels which can be used for pulse width modulation (PWM) with a max. frequency of up to 500 Hz.

Extended functions are also available for analog modules:

The temporal resolution can be increased by “oversampling” in isochronous mode to enable finer resolution of the signal sequences.

The “Measuring range scaling” function enables the precise resolution of the measured signal around a specific operating point to several decimal places.

With “Process value scale”, a technological variable can be directly assigned to the analog value of the module. The conversion is made directly in the module, which saves power and cycle time in the CPU.

Simple and fast diagnostics using quality information directly in the user program

By activating the quality information (QI) of a module, the validity of the delivered process value can be directly scanned and evaluated in the user program. Access is possible using simple binary or load commands via the process image. A prerequisite is that the module has diagnostics capability and that the quality information was configured in the TIA Portal.


Manuals for the scalable ET 200MP I/O system can be downloaded free of charge from the Internet (SIMATIC Customer Support,

  • Labeling sheets for 35-mm modules
    For insertion into the I/O modules. 10 DIN A4 sheets with 10 strips each, perforated, for printing using a standard laser printer; colors available: Al gray, yellow (for F modules)
  • Labeling sheets for 25-mm modules
    For insertion into the I/O modules. 10 DIN A4 sheets with 20 strips each, perforated, for printing using a standard laser printer; colors available: Al gray
  • Shield connection for 35-mm modules
    A shield connection set which can be easily mounted without tools is available for the ET 200MP system (analog modules and technology modules). This consists of a 24 V DC infeed element, a shield clamp, and a universal shield terminal. The latter is designed so that it can be used for a single thin trunk cable, several thin trunk cables, or a thick trunk cable. Consistent separation of 24 V DC infeed and measurement signals as well as a low-impedance connection between shield and signal cables ensure high EMC stability and high resistance to interference.
  • Front connector for 35 mm modules
    Uniform 40-pin front connector for connecting the I/O signals; available with screw-type and push-in terminals
  • Front connector for 25 mm modules
    Uniform 40-pin front connector for connecting the I/O signals; available with push-in terminals; for simplified ordering and logistics, this connector is enclosed with every 25 mm wide I/O module. It can also be ordered as a spare part.
  • Miscellaneous
    Further accessories are also available, such as front flaps for the I/O modules, power supplies, communication and technology modules or U-connectors for the self-configuring backplane bus.

The ET 200MP has a design with front connectors (“quasi-permanent wiring”). The front connector is plugged onto the I/O module. When replacing a module, only the front connector must be released from the module. Rewiring of the actual signals is unnecessary. This guarantees fast replacement of modules. The integrated mechanical slot coding prevents inadvertent interchanging of the front connectors.


A central controller can access the distributed I/O modules of the ET 200MP in the same way as central I/O modules via PROFINET or PROFIBUS.

Communication is carried out fully automatically between the I/O controller in the central controller and the IM 155-5 PN ST. Internal data transfer is interference-free on shielded cables.

Comprehensive, channel-specific diagnostics with plain text messages enables location and elimination of system faults in the shortest possible time. Annoying plant downtimes belong to the past, and availability is significantly increased.