Reliable Dual-Port Serial Interface for Stable Industrial Data Exchange
The Yokogawa NFLR121-S00 S1 Serial Communication Module is a high-reliability communication interface designed for STARDOM FCN and CENTUM VP distributed control systems. It enables robust serial data transmission between controllers and external devices such as PLCs, analyzers, flow computers, and monitoring systems.
Built for industrial environments requiring stable long-distance communication, this module ensures consistent performance, strong noise immunity, and flexible integration with RS-422/RS-485 networks.
Technical Specifications
| Parameter | Details |
|---|
| Model | NFLR121-S00 S1 |
| Product Type | Serial Communication Module |
| Interface | RS-422 / RS-485 (dual ports) |
| Communication Mode | Half-duplex / multipoint |
| Baud Rate Range | 0.3 kbps – 115.2 kbps |
| Data Format | ASCII / Binary |
| Character Length | 7 / 8 bits selectable |
| Parity | None / Even / Odd |
| Stop Bits | 1 / 2 bits |
| Maximum Transmission Distance | Up to 1200 m total line length |
| Connector Type | D-sub 9-pin + terminal block (M4 screw) |
| Current Consumption | Approx. 500 mA |
| Weight | Approx. 0.3 kg |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| System Compatibility | FCN / FCJ / STARDOM controllers |
Application Areas
The NFLR121-S00 S1 is widely used in industrial automation systems requiring reliable serial communication:
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Oil & gas production and pipeline monitoring systems
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Petrochemical and chemical processing plants
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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 systems (DCS)
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Integration with third-party PLC and instrumentation systems
It is especially effective in environments where stable, long-distance communication is critical.
Key Advantages
The NFLR121-S00 S1 delivers high communication stability, strong industrial noise resistance, and flexible protocol handling, making it a dependable interface for distributed automation systems. Its dual-port design enables efficient multi-device communication while reducing system complexity.
With RS-422/RS-485 support, it allows both point-to-point and multipoint networking, improving wiring efficiency in large-scale installations. The module is also engineered for continuous operation in harsh environments, ensuring reliable data transmission over long distances.
Its compact modular design allows seamless integration into Yokogawa controller racks, supporting scalable system expansion and easy maintenance.
Technical FAQs
1. What is the main function of this module?
It enables 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 serial communication ports.
4. What is the maximum communication distance?
Up to 1200 meters depending on system configuration.
5. What is the communication speed range?
0.3 kbps to 115.2 kbps.
6. Is it suitable for multipoint networks?
Yes, it supports multipoint RS-485 communication.
7. What systems is it compatible with?
Yokogawa STARDOM FCN and CENTUM VP systems.
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 denotes a specific hardware revision optimized for STARDOM/CENTUM integration.
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