Main components of the ET 200iSP distributed I/O system:

• Terminal modules
  mounted on an S7‑300 rail; for connecting power supply, interface, electronics, watchdog and reserve modules and for prewiring
  • with blue screw-type or spring-loaded terminals for hazardous environments
  • with black screw-type terminals for non-hazardous environments
• Power supply unit
  1 or 2 (redundant) power supply modules PS with pressurized enclosure for feeding 24 V DC or 120/230 V AC
• Interface module
  1 or 2 (redundant) IM 152 interface modules for connecting the station to the PROFIBUS DP
• Electronics modules (2/4/8 channels): Up to 32 in any combination
  • Digital electronics modules (DI, DO)
  • Analog electronics modules (AI, AO)
  • Safety-related electronics modules (F-DI, F-DO and F-AI)
  • Watchdog module
• Accessories
  • Reserve module for reserving a slot for any electronics module
  • Terminating module (included in scope of delivery of terminal modules for the PROFIBUS interface)
  • Labeling sheets with printable labeling strips
  • Inscription labels for slot numbering

Assembly

Assembly is quick and easy:

• Latching of terminal modules onto the S7‑300 rail
• Prewiring of process signal cables on the terminal modules using spring-loaded or screw-type connections
• Plugging-in of power supply, interface and electronics modules without the need for additional tools

Expansion limits

The station width is 107 cm in the maximum configuration with 32 electronic modules.

The maximum number of electronics modules which can be used per station may be limited depending on the current consumption of the modules required to solve the automation task. However, up to 16 electronics modules can be used without limitation.

Stainless steel wall enclosure

If the ET 200iSP is used in a hazardous area, it must be installed in an appropriate Ex housing which at least corresponds to the IP54 degree of protection. Appropriate versions of an IP65 housing are offered in the Section "Stainless steel wall housings".

Outstanding design features

• Installation and testing of the wiring is possible in advance without the electronics module (independent wiring).
• Isolation of the mechanical and electronic systems, in conjunction with the independent process wiring, permits fast and easy replacement of the electronics modules
• Mechanical coding which is carried out when an electronics module is plugged onto a terminal module for the first time prevents the connection of incorrect replacement modules
• Hot swapping of the power supply modules and electronics modules is possible without a fire certificate.