YOKOGAWA F3SP Series Modules – F3SP28-0S

Technical Dossier

Product Details And Specifications

YOKOGAWA F3SP Series Technical Notes

The YOKOGAWA F3SP series represents the CPU module lineup for the FA-M3 programmable logic controller platform, one of the most widely deployed control architectures in global heavy industry. FA-M3 installations are documented across petrochemical complexes, nuclear power auxiliary systems, LNG terminals, offshore platforms, and continuous-process refineries. The F3SP series CPU modules serve as the computational core of these systems, executing ladder logic, function block diagrams, and structured text programs while managing I/O bus communication across multi-rack configurations. The installed base of FA-M3 systems globally ensures sustained demand for F3SP CPU modules well beyond the series' active production window, making reliable spare parts sourcing a critical operational requirement for plant maintenance engineers and reliability teams.

The Evolution of F3SP Architecture

The F3SP series evolved through several distinct generations tied to the FA-M3 platform's development roadmap. Early-generation modules such as the F3SP05-0P and F3SP08-0P established the foundational backplane bus protocol and memory-mapped I/O architecture that remained consistent across the entire product family. Mid-generation releases introduced expanded program memory, faster scan cycle execution, and enhanced communication port options — exemplified by the F3SP21-0N and F3SP28-0S. Later releases including the F3SP35-5N, F3SP38-0N, and F3SP53-4H added Ethernet connectivity, redundancy support, and expanded I/O point capacity to address the demands of larger distributed control architectures. The F3SP59-4S and F3SP67-4S represent the high-end tier, supporting multi-CPU configurations and high-speed data link modules. Compatibility across generations is constrained by backplane slot assignments and firmware revision levels; cross-generation substitution requires validation against the FA-M3 system configuration tool (WideField3). The series has entered the mature/end-of-life phase, with YOKOGAWA having transitioned active development to the STARDOM FCN/FCJ platform. This makes long-term maintenance sourcing — including refurbished and tested F3SP units — a primary procurement strategy for existing FA-M3 installations.

F3SP Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the YOKOGAWA F3SP CPU series. Each entry reflects a distinct hardware revision or capability tier within the FA-M3 platform:

F3SP05-0P: Entry-level CPU, 10K step program memory, basic ladder execution
F3SP08-0P: Compact CPU, 20K step capacity, single RS-232C port
F3SP21-0N: Standard CPU, 60K steps, dual serial ports, expanded data registers
F3SP22-0S: Enhanced standard CPU, 60K steps, improved interrupt handling
F3SP28-0S: Mid-range CPU, 120K steps, RS-232C + RS-485, high-speed counter support
F3SP35-5N: Advanced CPU, 250K steps, Ethernet port, online program modification
F3SP38-0N: High-capacity CPU, 250K steps, dual Ethernet, redundancy-ready
F3SP53-4H: High-end CPU, 500K steps, multi-CPU link, extended data memory
F3SP58-6S: Performance CPU, 500K steps, SFC/FBD execution, high-speed I/O scan
F3SP59-4S: Top-tier CPU, 1M steps, multi-CPU configuration, data link master
F3SP67-4S: Maximum-capacity CPU, 1M steps, redundant power input, hot-standby support
F3SP71-4N: Latest-generation standard CPU, Ethernet-native, WideField3 compatible
F3SP76-7S: Latest-generation high-end CPU, expanded I/O bus bandwidth
F3SP28-3N: Revised mid-range CPU, Ethernet-equipped variant of the -0S hardware base
F3SP22-0N: Network-variant standard CPU, RS-232C + Ethernet dual-port configuration