FCN consists of a power supply module, CPU module, I/O module, and base module. NFAF135-S50 is one of the I/O modules inserted in FCN. The CPU module uses the process value from each I/O module to execute application programs and perform necessary control. Communication between the CPU module and each I/O module is performed via SB-BUS connected to the base module. The CPU module is connected to the user interface PC via Ethernet, and users can perform operation and monitoring on it. The upper system for wind power generation systems usually uses a supervisory control and data acquisition (SCADA) software package for operation and monitoring of the process. Yokogawa offers FAST/TOOLS as a SCADA software package, which supports more than one million I/O points and is suitable for operation and monitoring wind turbines distributed over a wide area.

NFAF135-S50 satisfies the demand for high accuracy and high reliability mainly in the wind power generation market, and has the following features.

Feature 1: Highly accurate measurement
Improved measurement accuracy achieved by reducing the influence of clock resolution on the accuracy by using frequency computation with the number of multiple pulses and accumulated time of their intervals
Highly accurate measurement in the low-frequency range required for wind power generation achieved by extending the frequency output update cycle when pulse intervals are long.

Feature 2: High reliability
Part selection and design considering derating.
Environment-resistant evaluation considering specification margins.
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Foxboro: I/A Series system, FBM full series (field input/output module)

Sequential control, ladder logic control, accident recall processing, digital-to-analog conversion, input/output signal processing,

Data communication and processing, etc.

Westinghouse: 1C31 series DCS system, CPU, OVATION system, WDPF system,

WEStation system spare parts.

Triconex: Redundant fault-tolerant control system, modern fault-tolerant controller based on triple modular redundancy (TMR) structure.

EMERSON: Modules, cards, drives and other spare parts.

XYCOM: XVME series

Bently: 3500/3300 system.

Rockwell: ICS system.

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Bailey: BRC series DCS system, etc.

Allen-Bradley: 1756, 1785, 1771, 1746 full range system, etc.

Yokogawa: CP series, etc.

Honeywell: TK/TC/CC systems, etc.

Reliance: 57C series, etc.

Schneider: 140 series processors, control cards, power modules, etc.

Modicon: AS series PLC system spare parts.

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Siemens MOORE, Siemens Simatic C1, Siemens CNC system, etc.

Motorola: MVME 162, MVME 167, MVME1772, MVME177, etc.

XYCOM: I/O, VME board and processor, etc.

GE: IC698/IC697 full range of PLC systems, modules, cards, drivers and other spare parts.

Yaskawa: servo controller, servo motor, servo driver.

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Woodward: SPC valve position controller, PEAK150 digital controller.