If there is an emergency situation in a process plant, a quick response is needed. Sirens, warning lights, or active cooling systems must be activated safely in line with the “energized to safe” (ETS) procedure, while motor controls or emergency shut-down valves are switched off according to “deenergized to safe” (DTS). To ensure safe signal transfer, Pepperl+Fuchs is setting a new level of reliability with newly developed safety relays. With triple redundant switching contacts, the interface module from the tried-and-tested K-System provides reliable and safety-related activation and deactivation for applications in accordance with IEC61508 up to SIL 3.
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