Yokogawa NFAF Series Modules NFAF135-S50

Technical Dossier

Product Details And Specifications

Yokogawa NFAF Series Technical Notes

The Yokogawa NFAF series represents a core family of analog output field control modules deployed within the CENTUM CS 3000 and CENTUM VP distributed control systems (DCS). These modules are installed across critical global heavy industries including petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, pulp and paper mills, and large-scale chemical processing plants. The NFAF series occupies a foundational role in process automation infrastructure, providing precision 4–20 mA analog signal output to final control elements such as control valves, variable speed drives, and positioners. Due to the long operational lifecycles typical of DCS installations (15–30 years), NFAF series modules remain in active service at hundreds of facilities worldwide, making spare parts availability a critical operational concern for plant maintenance engineers and procurement teams.

NFAF Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Yokogawa NFAF and closely related CENTUM CS 3000 / CENTUM VP analog output module family. Each entry reflects a distinct hardware configuration or revision level.

Analog Output Modules (AO)

• NFAF135-S50: 16-ch analog output module, 4–20 mA, CENTUM CS 3000 / VP compatible, ESB bus
• NFAF135: 16-ch analog output module, base revision, CENTUM CS 3000 platform
• NFAF141-S50: 8-ch analog output module, 4–20 mA, isolated outputs, CENTUM VP
• NFAF141: 8-ch analog output module, non-isolated, CENTUM CS 3000
• NFAF543-S50: 4-ch analog output, high-accuracy 16-bit resolution, CENTUM VP
• NFAF543: 4-ch analog output, standard resolution, CENTUM CS 3000

Analog Input Modules (AI)

• NFAI135-S50: 16-ch analog input, 4–20 mA / 1–5 V, CENTUM CS 3000 / VP
• NFAI135: 16-ch analog input, base revision, CENTUM CS 3000
• NFAI141-S50: 8-ch analog input, isolated, high-impedance, CENTUM VP
• NFAI543-S50: 4-ch analog input, 16-bit, high-accuracy, CENTUM VP

Digital Input / Output Modules (DI/DO)

• NFDV151-S50: 32-ch digital input module, 24 VDC, CENTUM CS 3000 / VP
• NFDV151: 32-ch digital input, base revision, CENTUM CS 3000
• NFDV161-S50: 32-ch digital output module, 24 VDC transistor, CENTUM VP
• NFDV161: 32-ch digital output, relay type, CENTUM CS 3000
• NFDV451-S50: 16-ch digital input, isolated, CENTUM VP high-density I/O

Communication & CPU Modules

• NFCP701-S50: Field control unit processor, CENTUM VP FCU, dual-redundant capable
• NFCP701: FCU processor, CENTUM CS 3000, single/redundant configuration
• NFBU100-S50: ESB bus unit, backplane communication interface, CENTUM VP

Power Supply Modules

• NFPS701-S50: 24 VDC power supply module, redundant-capable, CENTUM VP FCU
• NFPS701: 24 VDC power supply, CENTUM CS 3000 FCU base unit