Difference between ET200L and ET200S

Hello,

ET200L
ET 200L is a small, compact I/O device with degree of protection IP20.

The ET 200L is mainly used for applications in the low-end performance range which require few inputs/outputs as well as for applications where space is limited.

The ET 200L is a passive node (slave) on PROFIBUS DP with transmission rates up to 1.5 Mbit/s.

ET 200S
The SIMATIC ET 200S is a distributed I/O system to IP 20 degree of protection. It comprises:

• Interface module with PROFIBUS (alternatively with integral CPU) or PROFInet interface
• Input/output modules
• Technology modules
• Frequency converters and motor starters for three-phase loads

Its extensive module spectrum and system-wide handling of configuring, installing and programming tasks make the ET 200S well-suited as a universal I/O system.

The discretely modular design ensures fast and optimum adaptation to system requirements:

• No need to keep spares
• No superfluous channels

Even when requirements change frequently, replacement or combining of different I/O modules can noticeably reduce setting-up times.

With a data signaling rate of up to 12 Mbit/s on the PROFIBUS DP and extremely powerful internal data transport capabilities, the ET 200S is also eminently suitable for extremely time-critical applications.

Two different versions are available for integrating safety technology with ET 200S.

• With conventional wiring, SIGUARD components achieve Safety Category 4 according to EN 954-1 with motor starter applications
• PROFIsafe components replace the wiring-based safety logic with a freely-programmable controller. This has the following advantages for the customer:
  • programming in the familiar STEP 7 programming environment in the LAD and FBD languages;
    no separate tool is required for programming or configuration
  • the safety program executes in the same controller as the standard program;
    a separate controller is not required
  • safety-related data can be transferred over the same fieldbus cable as standard data;
    no additional wiring of the safety-related inputs and outputs is necessary
  • safety-related inputs and outputs can be combined with standard inputs and outputs within a DP station;
    no additional safety-related DP nodes (stations) are necessary

The design of the ET 200S allows it to be used in areas subject to increased mechanical stress.

The system characteristics meet high plant availability requirements.