High-Reliability Dual-Port Serial Interface for Industrial Control Systems
The Yokogawa NFLR121-S50 S1 Serial Communication Module is a robust industrial communication interface designed for STARDOM FCN/FCJ autonomous controller platforms. It enables stable and secure serial data exchange between control systems and external field devices such as PLCs, analyzers, remote I/O units, and third-party instrumentation.
Engineered for harsh industrial environments, this module delivers strong noise immunity, long-distance communication capability, and flexible protocol integration for distributed automation systems.
Technical Specifications
| Parameter | Details |
|---|
| Model | NFLR121-S50 S1 |
| Product Type | Serial Communication Module |
| Interface | RS-422 / RS-485 (dual ports) |
| Communication Mode | Half-duplex / full-duplex (system dependent) |
| Protocol Support | Modbus-RTU, subsystem communication |
| Baud Rate Range | 0.3 kbps – 115.2 kbps |
| Transmission Code | ASCII / Binary |
| Character Format | 7 or 8 bits selectable |
| Parity | None / Even / Odd |
| Stop Bits | 1 or 2 |
| Maximum Distance | Up to 1200 m (total RS-422/RS-485 network) |
| Channel Configuration | 2 independent serial ports |
| Current Consumption | Approx. 0.5 A |
| Weight | Approx. 0.3–0.34 kg |
| Operating Temperature | -10°C to +55°C (typical industrial range) |
| Mounting | FCN / STARDOM rack-based installation |
Application Areas
The NFLR121-S50 S1 is widely used in industrial automation systems requiring reliable serial communication:
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Oil & gas production and pipeline monitoring
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Petrochemical and refining process control
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Power generation and energy management systems
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Water and wastewater treatment facilities
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SCADA and distributed control system integration
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Remote telemetry and field instrumentation networks
It is especially effective in multi-device RS-485 networks where stable long-distance communication is required.
Key Advantages
The NFLR121-S50 S1 delivers high communication stability, strong electrical isolation, and flexible system integration, making it a dependable choice for industrial control networks. Its dual-port architecture allows simultaneous communication with multiple devices, improving system efficiency and wiring flexibility.
With support for RS-422 and RS-485 standards, it enables both point-to-point and multipoint configurations, reducing installation complexity in large-scale automation systems. The module is designed for continuous operation in electrically noisy environments, ensuring consistent and accurate data transmission.
Its compact modular design allows seamless integration into Yokogawa FCN/STARDOM platforms, supporting scalable and maintainable system architectures.
Technical FAQs
1. What is the main function of this module?
It provides serial communication between controllers and external industrial devices.
2. What interfaces does it support?
RS-422 and RS-485 communication interfaces.
3. How many ports does it have?
Two independent serial communication ports.
4. What is the maximum transmission distance?
Up to 1200 meters depending on cable and configuration
5. What protocols are supported?
Modbus-RTU and subsystem communication functions.
6. Is it suitable for multipoint networks?
Yes, it supports RS-485 multipoint communication.
7. What systems is it compatible with?
Yokogawa STARDOM FCN and FCJ controllers.
8. What industries commonly use it?
Oil & gas, chemical, power generation, and utilities.
9. What is its key advantage?
Reliable long-distance communication with strong noise immunity.
10. What does the S1 version indicate?
It represents a hardware revision optimized for improved STARDOM integration and stability.
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