About S900

S900 provides input and output modules needed for intrinsically safe connection of field signals. In S900 modules, the field signals are digitized and electrically isolated then made available via PROFIBUS DP for the N-System or PROFIBUS DP-IS for the S-/B-System. Higher-level process control systems, programmable logic controls, or SCADA systems use this intrinsically safe fieldbus to communicate with the communication interface. One and the same fieldbus network is used for the configuration of the individual S900 stations, the cyclical data exchange, all acyclic services, and communication with HART field devices. When it comes to installation and maintenance, all input/output modules can be replaced easily and quickly as the modules and the optionally redundant communication interfaces of systems placed in Zone 1 can be removed and plugged in while operation is running, without affecting the communication of the remaining modules. Integrated, encapsulated disconnection mechanisms also allow the power supply units to be exchanged without switching off the power.

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