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® WorleyParsons <br /> resources&energy <br /> BOP portions of the DCS. Graphic and trend displays associated with the OEM-supplied <br /> equipment will be provided. Faceplates will be included as pop-up windows on the process <br /> graphic displays. SOE trip logs will be included. <br /> 5.3.5 Input/Output <br /> Discrete I/O in the form of analog input/outputs (AI/AO) and digital input/outputs (DI/DO) <br /> will be utilized. Pure alarms will open-to-alarm and fail in the open position. Alarms used <br /> for control will close-to-alarm and fail in the open position. <br /> Field Wiring <br /> Field wiring to the DCS will land on compression type terminal blocks in the processor or <br /> remote I/O cabinets. The DCS will accept both field powered and dry contact inputs. The <br /> normal wetting voltage for digital inputs will be 24 VDC supplied by the DCS from <br /> redundant power supplies. Motor run/stop status contacts will be 120 VAC powered from <br /> the motor control center. Solenoid-operated valves will generally be 120VAC powered <br /> from the DCS. <br /> Sequence of Events <br /> One millisecond resolution time stamped points (SOE)will be provided for the following: <br /> Generator circuit breakers (52b contacts) <br /> The 4.16kV volt main breakers to secondary unit substation transformers (4.16kV to 480 <br /> volt) (52b contacts) <br /> The 480 volt secondary unit substation main breakers (52b contacts) <br /> All lockout relays combined into a single "protection tripped" signal (normally-open <br /> contact) <br /> No other points than those listed above will be connected as SOE <br /> 5.3.6 Foreign Device Interface (FDI) <br /> The DCS will be capable of interfacing with other foreign devices through Ethernet, <br /> RS232, or RS485 interfaces using a MODBUS or TCP/IP protocol (where applicable). <br /> Data links to the DCS will be provided for switchgear relays, fuel gas metering station, <br /> ammonia delivery system, CEMS, HRSG, air compressor, and gas compressors. A Serial <br /> MODBUS link will be utilized for interfacing to the CT and STG TCP. <br /> 5.3.7 Factory Acceptance Test <br /> The DCS will include a supplier-supported factory acceptance test, which will provide a <br /> thorough demonstration of all functional features of the DCS. The system will be <br /> Lodi Energy Center 3.5 -4 LEC AFC <br /> 071608 Rev.A <br />