exida adds Moore safety trip alarm to exSILentia safety software
Part of Moore Industries FS FUNCTIONAL SAFETY SERIES, the STA performs as a Logic Solver and acts on potentially hazardous process conditions; it warns of unwanted process conditions and provides emergency shutdown or on/off control in Safety Instrumented Systems (SIS) and traditional alarm trip applications.
By including the STA in the exSILentia software tool, exida has provided competent functional safety practitioners a way to determine the STAs applicability in specific safety-related applications. Exida is highly selective in choosing components for exSILentias equipment database. To include the STA, the Functional Safety experts at exida had to review and approve all Failure Modes, Effects, and Diagnostic Analysis (FMEDA) data.
In the exSILentia tool, safety practitioners can select the 4-wire (line/mains-powered) STA as an economical Logic Solver that accepts a signal input from transmitters (current and voltage inputs), temperature sensors, resistance and potentiometer devices and more.
The STA can be configured for a wide variety of Safety Instrumented Functions (SIF) for safety related applications. The high availability alarm trip is designed for Safety Instrumented Systems up to SIL 2 and the firmware is suitable for use in a SIL 3 system, in a 1oo2 (one out of two) voting architecture.
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 STAs extensive internal diagnostics. This fault relay is also triggered if the input is faulty or broken.
The STA features industry-best 20-bit input resolution; long term stability of up to 5 years between scheduled calibrations; a rugged, industrial metal housing; and isolation and RFI/EMI protection that provides superior protection against the effects of ground loops, plant noise, and radio frequency and electromagnetic interference. The unit also features standard transmitter excitation that provides 24V power to a 2-wire transmitter.
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