The IM 152 interface module connects the ET 200iSP to the PROFIBUS DP with intrinsically-safe RS 485-iS transmission technology with transmission rates of up to 1.5 Mbps. A redundant connection is also possible. In this case the ET 200iSP is connected via two interface modules to two redundant PROFIBUS DP segments of a fault-tolerant automation system.

The IM 152 is plugged onto a special terminal module (to be ordered separately). The following terminal modules are available:

• TM-IM/IM terminal module for two interface modules (for redundant PROFIBUS DP connection)
• TM-IM/EM60 terminal module for one interface module and one watchdog, reserve or electronics module (except 2 DO relay)
  • with blue screw-type or spring-loaded terminals for hazardous environments
  • with black screw-type terminals for non-hazardous environments

Tasks of the IM 152 interface module

• Connection of ET 200iSP to the intrinsically-safe PROFIBUS DP
• Autonomous communication with the host automation system
• Preparation of data for the fitted electronic modules
• Saving of parameters of the electronics modules
• Time stamping of digital process signals with an accuracy of 20 ms

The maximum address space of the interface module is 244 bytes for inputs, and 244 bytes for outputs.