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Safety trip alarm

MOORE Industries has introduced the STA Safety Trip Alarm certified to IEC 61508: Parts 1, 2 and 3 by TÜV Rheinland for single use in Safety Instrumented Systems up to SIL 2.

The STA firmware is said to be suitable for a SIL 3 system, which allows the STA to be used in a redundant architecture (1oo2, 2oo3, etc.) up to SIL 3.

The alarm can perform as a logic solver and act on potentially hazardous process conditions; warn of unwanted process conditions; provide emergency shutdown; or provide on/off control in Safety Instrumented Systems and traditional alarm trip applications.

The 4-wire (line/mains-powered) STA accepts a signal input from transmitters (current and voltage inputs), temperature sensors (RTD and thermocouple inputs), resistance and potentiometer devices, and a wide range of other monitoring and control equipment.

The STA provides three failsafe alarm outputs. Two are configurable process alarms that trip when a monitored process variable falls outside of user-set high and/or low limits.

The third alarm is a non-programmable, latching alarm that is activated if any internal faults are found by the STA’s extensive internal diagnostics.

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