Frequently Asked Question

We have 2 related Logic Solvers in one SIF. When the Steam Turbine Speed is High High, our SIF closes steam line 2 valves to protect the compressor. One valve is closed via PLC 1 (Invensys Trident, 2oo3 TMR) and the other is closed via PLC 2 (Honeywell SM
Last Updated a year ago

In your SIF, the logic solver is the PLC. Final element leg for valve 1 simply consists of the solenoid, actuator and valve. The final element leg for valve 2 includes the ESD system as an interface module in addition to the solenoid, actuator and valve. You can input the failure rates of the ESD by entering it as a 'my own' device.

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