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- Yokogawa
- NFLR121-S51
- Serial Communication Module
- Japan
- 130 x 142.9 x 32.8mm
- 0.3 kg
- Xiamen, China
- New & In Stock
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Yokogawa NFLR121-S51 Serial Communication Module
Product Introduction
The Yokogawa NFLR121-S51 is an advanced serial communication module designed to deliver high-efficiency and reliable communication between field devices and control systems. As a direct upgrade from the NFLR121-S50, this model offers enhanced protocol support and improved stability, making it a preferred choice for users who demand both flexibility and performance in industrial environments.
Built with industrial-grade durability, the NFLR121-S51 integrates seamlessly into Yokogawa’s FA-M3 series and other automation platforms. With a compact form factor and robust design, it allows for easy installation and long-term operation under harsh environmental conditions.
This module supports a range of serial communication protocols including Modbus RTU and ASCII, and introduces extended baud rate capabilities and configurable communication settings for broader compatibility. Whether you’re setting up a new control system or expanding an existing network, the NFLR121-S51 delivers the reliability and integration power modern industry demands.
Product Specifications
| Parameter | Value |
|---|---|
| Model | NFLR121-S51 |
| Dimensions | 130 x 142.9 x 32.8 mm |
| Weight | 0.3 kg |
| Input Power | 24V DC ±10% |
| Communication Ports | 2 x RS-485 (isolated) |
| Supported Protocols | Modbus RTU, Modbus ASCII, custom ASCII |
| Baud Rate Options | 9600, 19200, 38400, 57600, 115200 bps |
| Mounting Method | DIN Rail Mount |
| Operating Temperature | -10°C to +60°C |
| Storage Temperature | -20°C to +80°C |
| Humidity | 5% to 95% RH, non-condensing |
| Protection Rating | IP20 |
| Isolation Protection | 1500V RMS optical isolation |
| Response Time | < 10 ms (typical) |
Applications
The NFLR121-S51 is tailored for industrial automation systems that demand stable, accurate, and fast data communication. It is widely applied in:
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Distributed Control Systems (DCS): Linking various field instruments to centralized control platforms.
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SCADA Networks: Facilitating real-time communication across large, geographically distributed systems.
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Factory Automation: Connecting PLCs, sensors, and HMIs in production environments.
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Power Generation and Distribution: Monitoring substations, transformers, and circuit protection devices.
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Oil and Gas Plants: Handling remote communications in rugged and hazardous areas.
Product Advantages
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Enhanced Protocol Compatibility: Compared to earlier models, the S51 version supports additional baud rates and flexible ASCII customization.
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High Reliability: Industrial-grade design ensures consistent performance in mission-critical systems.
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Compact Yet Powerful: Despite its small size, the module delivers high-speed communication and rapid response times.
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Electrical Isolation: Optical isolation minimizes the risk of signal interference or equipment damage.
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User-Friendly Configuration: Easily set up via Yokogawa’s configuration tools or programmable logic interfaces.
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Excellent Interoperability: Designed to work flawlessly with other Yokogawa modules and third-party devices.
Brand Information
Yokogawa Electric Corporation, headquartered in Tokyo, Japan, is a globally recognized leader in the field of industrial automation and control, test and measurement, and engineering services. Since its establishment in 1915, Yokogawa has been committed to innovation and precision, serving key industries such as oil & gas, chemical, power, water treatment, and pharmaceuticals.
Their product range, including DCS systems, PLCs, transmitters, and communication modules like the NFLR121 series, is known for its durability, precision, and high-level integration capabilities.
Related Model Recommendations (Same Series or Similar)
| Model | Description | Key Specifications |
|---|---|---|
| NFLR121-S50 | Standard serial communication module | Modbus RTU/ASCII, 24V DC, 130 x 142.9 x 32.8 mm, 0.3 kg |
| NFLR123-S50 | Modbus TCP/IP-enabled communication module | Adds Ethernet port, supports TCP/IP, DIN mount |
| NFLR122-S00 | Serial-to-Ethernet gateway module | Serial + Ethernet conversion, high-speed switching |
| NFLR124-S10 | Extended protocol multi-port communication module | Dual-port RS-485, Modbus RTU, ASCII, 115200 bps |
| NFLR120-S00 | Entry-level communication module | Basic Modbus RTU, compact, 9600/19200 bps |
Other Popular Yokogawa Models (Similar Format)
| Model | Description | Key Specifications |
|---|---|---|
| NFLR110-S00 | Basic serial communication module | Modbus RTU, RS-232/485, 24V DC, 0.3 kg |
| NFLN141-S10 | Dual-port RS-485 network module | 2 ports, 24V DC, 115200 bps, compact DIN design |
| NFLF161-S00 | Ethernet communication module | TCP/IP, 100 Mbps, 24V DC, DIN rail |
| NFLR150-S00 | Multi-protocol serial module | Supports Modbus & custom ASCII, IP20 protection |
| NFLG170-S00 | Gateway module for protocol conversion | Converts Modbus to proprietary, 24V DC, 0.33 kg |
Frequently Asked Questions (FAQ)
Q1: What is the main difference between NFLR121-S50 and NFLR121-S51?
A1: The NFLR121-S51 supports a wider range of baud rates and offers more flexible protocol customization options compared to the S50 model.
Q2: How many serial ports does the S51 model provide?
A2: It comes with two RS-485 ports that are electrically isolated to ensure stable communication.
Q3: Can I use this module in a hazardous industrial environment?
A3: While it is rugged, the NFLR121-S51 is not certified for use in explosive environments. Additional protective enclosures are recommended for such applications.
Q4: How do I configure communication settings like baud rate and parity?
A4: These parameters can be easily set using Yokogawa’s configuration software or via Modbus registers.
Q5: Does it support both master and slave Modbus roles?
A5: Yes, the module can be configured to function as either a Modbus master or slave, depending on system requirements.
Q6: What kind of electrical isolation does the module provide?
A6: It offers 1500V RMS optical isolation to protect against voltage spikes and signal interference.
Q7: What is the installation process like?
A7: The module is DIN rail mountable and can be installed quickly with standard industrial panel setups.
Q8: Is this module compatible with Yokogawa’s FA-M3 series PLCs?
A8: Absolutely. It is designed for seamless integration with FA-M3 and other Yokogawa automation platforms.
Q9: How does this module handle communication errors or dropouts?
A9: It includes built-in error detection, CRC checking, and configurable retry mechanisms for reliable data integrity.
Q10: Is firmware upgradeable in the field?
A10: Yes, firmware updates can be applied through a standard serial interface using Yokogawa’s maintenance tools.
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All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
Free warehouse
We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
Technical Team
Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
Thoughtful after-sales service
24-hour after-sales service guarantee team, professional and standardized management service system.