YOKOGAWA F3RS22-ON Ruggedized Serial Communication Module

Product Overview

YOKOGAWA F3RS22-ON Ruggedized Serial Communication Module for Harsh Industrial Environments

The YOKOGAWA F3RS22-ON is a high-reliability serial communication module engineered for the FA-M3 modular PLC platform — one of YOKOGAWA’s most trusted control architectures deployed across critical infrastructure worldwide. Designed to operate continuously in environments characterized by extreme temperature fluctuations, high humidity, airborne particulates, mechanical vibration, and intense electromagnetic interference, the F3RS22-ON delivers the communication integrity that safety-critical and continuous-process applications demand.

In industrial facilities where downtime is measured in tens of thousands of dollars per minute — oil refineries, chemical processing plants, power generation stations, water treatment facilities, and heavy metallurgical operations — the serial communication backbone of a control system is not a peripheral concern. It is the nervous system of the entire automation architecture. The F3RS22-ON provides RS-232C and RS-422/485 serial communication interfaces that connect the FA-M3 CPU modules to field instruments, operator interfaces, barcode readers, weighing controllers, and third-party intelligent devices with deterministic, low-latency data exchange.

Built to YOKOGAWA’s stringent manufacturing standards in Japan, this module integrates seamlessly within the FA-M3 rack alongside companion modules including the F3SP71-4N and F3SP76-7N CPU modules, F3DA04-1N analog output modules, F3AD08-6N analog input modules, and F3YD32-3N digital output modules. The F3RS22-ON’s communication channels are fully configurable via YOKOGAWA’s WideField3 programming environment, enabling engineers to define baud rates, parity, stop bits, and protocol framing to match the exact requirements of connected field devices.

Rugged Specifications Table

Comprehensive Protection Solutions

The F3RS22-ON does not operate in isolation — it is a critical node within a broader FA-M3 control system architecture. In a typical heavy-industry control cabinet, the module works in concert with the F3SP71-4N CPU module, which handles ladder logic execution and program memory management, while the F3PU20-0N power supply module provides stable, noise-filtered DC power to the entire rack. Analog field signals are conditioned through F3AD08-6N analog input modules before being processed by the CPU, and control outputs are issued via F3YD32-3N digital output modules to actuators, solenoid valves, and motor starters.

For applications requiring functional safety compliance, the FA-M3 platform supports integration with dedicated safety relay modules and external safety PLCs. In such architectures, the F3RS22-ON’s serial channels are frequently used to bridge the standard control network with safety instrumented system (SIS) components, transmitting diagnostic data and process values between the FA-M3 and safety controllers without introducing latency that could compromise protective function response times.

In distributed control environments, the F3RS22-ON complements YOKOGAWA’s STARDOM FCN/FCJ remote I/O nodes and interfaces with CENTUM VP DCS field control stations via serial Modbus RTU or proprietary YOKOGAWA communication protocols. This interoperability makes the F3RS22-ON a versatile communication bridge in hybrid automation architectures where legacy serial field devices must coexist with modern Ethernet-based control networks. The module also supports connection to F3LE01-5T Ethernet communication modules within the same rack for gateway applications, enabling serial-to-Ethernet protocol conversion at the rack level.

For power quality and surge protection in harsh field environments, pairing the FA-M3 rack with industrial-grade DIN-rail surge protection devices and UPS systems ensures that the F3RS22-ON’s communication channels remain stable during grid disturbances — a common occurrence in mining, smelting, and heavy press operations where large motor loads create significant voltage transients on shared power infrastructure.

Application in Critical Infrastructure

In oil and gas upstream and midstream operations, the YOKOGAWA F3RS22-ON is deployed in wellhead control panels, pipeline SCADA RTUs, and compressor station automation systems. Its RS-485 multi-drop capability allows a single module to poll up to 32 field instruments — including pressure transmitters, flow computers, and gas chromatographs — over a single twisted-pair cable run spanning hundreds of meters, dramatically reducing wiring complexity in remote installations.

In thermal and hydroelectric power generation, the F3RS22-ON serves as the communication interface between FA-M3 PLCs and turbine governor controllers, excitation systems, and protection relay panels. The module’s deterministic communication timing ensures that trip signals and status data are exchanged within the sub-second windows required by power system protection schemes.

In municipal and industrial water treatment facilities, the F3RS22-ON connects FA-M3 controllers to chlorination dosing systems, variable frequency drives (VFDs) on pump motors, and SCADA master stations. Its ability to operate continuously at elevated ambient temperatures — common in pump houses and chemical dosing rooms — without performance degradation makes it a preferred choice for water utility automation engineers.

In metallurgical and mining operations, where electromagnetic interference from arc furnaces, large DC drives, and high-current bus bars creates one of the most challenging EMC environments in industry, the F3RS22-ON’s robust noise immunity design maintains communication integrity. Replacement of failed communication modules in these environments must be rapid to minimize production loss; the F3RS22-ON’s hot-swap-compatible FA-M3 rack architecture and straightforward configuration restore process minimize mean time to repair (MTTR) to under 30 minutes for trained maintenance personnel.

In chemical and petrochemical batch processing, the module interfaces with recipe management systems, weighing terminals, and barcode verification stations, providing the serial communication backbone for material tracking and batch record integrity — a regulatory requirement under GMP and HAZOP-driven process safety management frameworks.

Security & Quality FAQ

Q1: What does the 12-month warranty cover for the F3RS22-ON?
The 12-month warranty covers all manufacturing defects and functional failures under normal operating conditions from the date of shipment. If the module fails to perform its specified serial communication functions within the warranty period due to a component or assembly defect, TOPNLMS will provide a replacement unit or full refund. The warranty does not cover damage resulting from incorrect installation, overvoltage events beyond rated specifications, or physical mishandling.

Q2: How is each F3RS22-ON tested before shipment?
Every F3RS22-ON unit in our inventory undergoes a pre-shipment functional verification process. This includes power-on self-test confirmation, communication channel loopback testing on both RS-232C and RS-422/485 interfaces, and visual inspection for connector integrity and PCB condition. Units that do not pass all test criteria are quarantined and not offered for sale. A test report is available upon request for customers with documented quality assurance requirements.

Q3: Is the F3RS22-ON compatible with all FA-M3 base units and CPU modules?
The F3RS22-ON is compatible with all standard FA-M3 Wide Series base units, including the F3BU04-0N (4-slot), F3BU06-0N (6-slot), F3BU13-0N (13-slot), and expansion base units. It is supported by FA-M3 CPU modules running YOKOGAWA WideField3 software version 3.x and above. For legacy FA-M3 systems running older firmware, compatibility should be verified against the YOKOGAWA FA-M3 hardware compatibility matrix or confirmed with our technical team prior to ordering.

Q4: Can TOPNLMS guarantee long-term supply and replacement support for the F3RS22-ON?
Yes. TOPNLMS maintains dedicated stock of FA-M3 series modules including the F3RS22-ON to support customers with long-lifecycle industrial installations. We understand that automation systems in power, oil and gas, and water treatment are designed for 15–25 year operational lifespans, and spare parts availability is a critical procurement consideration. Our sourcing network ensures continued access to genuine YOKOGAWA FA-M3 modules even as product lines mature. Customers with ongoing maintenance contracts or multi-unit requirements are encouraged to contact us to discuss reserved stock arrangements.