SIMATIC ET 200 remote I/O stations for SIMATIC PCS 7

The SIMATIC PCS 7 process control system offers a variety of possibilities for detecting and outputting process signals via sensors and actuators as well as for connecting process I/O to the automation systems:

• Signal and function modules in remote I/O stations on the fieldbus
  • PROFIBUS DP (ET 200M, ET 200iSP, ET 200S, ET 200pro)
  • PROFINET IO (ET 200M, ET 200SP)
• Intelligent, distributed field/process devices and operator terminals directly on the PROFIBUS DP, PROFIBUS PA or FOUNDATION Fieldbus H1
• Analog and digital I/O modules of the SIMATIC S7-400 operated centrally in the automation system

SIMATIC S7-400 signal modules used centrally in the automation system are suitable for small applications or plants with few remote locations.

In practice, however, distributed process I/Os are mainly used which, depending on the type, also support redundant configurations or operation in explosive gas/dust atmospheres:

• SIMATIC ET 200 remote I/Os in conjunction with classic field/process devices and HART field devices
• Intelligent field/process devices for direct fieldbus connection

Especially convincing arguments for distributed process I/O include:

• Modularity and consistency
• Flexible adaptability to the plant structure
• Minimum cabling and engineering requirements
• Low commissioning, servicing and lifecycle costs
• Wide technical bandwidth