The SIL 2/3 capable STA Safety Trip Alarm performs as a logic solver and acts on potentially hazardous process conditions by providing emergency shutdown or early warning indication in Safety Instrumented Systems (SIS).

In response to customer feedback, the STA has been updated to provide more flexibility in handling input faults. This allows for spurious alarms to be minimized and for alarms to be cleared without power cycling or needing physical access to the unit.

New configuration options that have been added include:

• Out-of-range input tolerances can now be set from 0-5%. There is a 2% restriction in use for safety systems.
• Startup delay from 0-120 seconds, which allows instruments providing input to the STA to stabilize on power up.
• Input fault alarms can now be non-latching or cleared remotely using the Manual Reset terminals.

For more information, please download the latest versions of the Data Sheet and  Installation Manuals available at the STA product page.

Do you want more information? Download the data sheet. Or see the Functional Safety Solutions in the catalog.

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