The distributed I/O system SIMATIC ET 200 integrates the quick and easy IO-Link communication of sensors and actuators into the established fieldbus systems PROFIBUS and PROFINET – and thus into Totally Integrated Automation with two master modules:

The distributed I/O ET 200S (IP20, for control cabinet installation) can accept up to 64 IO-Link masters – the serial interface modules 4SI IO-Link. For PROFINET, the rugged block I/O ET 200eco PN featuring a high degree of protection (IP65/67) is available as IO-Link master module.      

Both solutions with four IO-Link channels each enable the connection of up to four IO-Link-certified devices. 

Product-specific IO-Link advantages

  • Seamless integration of IO-Link-certified sensors and actuators into TIA

  • Standardized engineering from master to device – all data in one S7 project

  • PtP communication with IO-Link-certified devices by Siemens and from the field 

  • Transparent, central diagnostics for all IO-Link devices

  • Master available in two protection classes (IP20/IP65) 

  • Transparent depiction of all field device parameters

  • Dynamic changing of the parameters directly by the controller

  • Easy function mapping in STEP 7 through freely available function block

  • Firmware updates directly over the fieldbus



  • Single-wide (15 mm) ET 200S electronic module

  • Max. cable length to the IO-Link device: 20 m

  • 4 IO-Link ports per module

  • Max. 32 bytes of input and 32 bytes of output data per module; individually adjustable with S7-PCT

  • Supports firmware updates

  • Supports I&M data

  • Supported transfer rates: COM1 and COM2

  • Operating modes per channel: IO-Link, SIO or deactivated; adjustable with S7-PCT


  • Rugged block I/O featuring a high degree of protection with 4 IO-Link channels for connecting one IO-Link device each; additional 8 digital inputs and 4 digital outputs with 24 V DC / 1.3 A

  • Short and wide housing of the ET 200eco PN

  • 4 IO-Link channels

  • 8 digital inputs – 24 V DC

  • 4 digital outputs – 24 V DC / 1.3 A

  • Max. cable length to the IO-Link device: 20 m

  • Operating modes of the IO-Link channels: IO-Link, DI, DO, deactivated

  • Supported transfer rates: 4.8 kBaud, 38 kBaud

The configuration of the IO-Link channels is performed with the Port Configurator Tool “S7-PCT”, which is integrated into the STEP 7 Engineering or as stand-alone tool. 

Application Areas

  • Appliance of IO-Link-certified sensors and actuators in all areas of the production automation