Présentation du produit
The Yokogawa NFSBT02 SB Bus T-joint with Built-in Terminator is a high-quality field communication component designed for Yokogawa’s industrial control networks, particularly those utilizing the SB bus system in FOUNDATION Fieldbus, Field Control Unité (FCU), and I/O subsystem networks. It provides a stable and low-noise physical connection between main and branch communication lines while ensuring proper signal termination through an integrated 100 Ω terminator circuit.
Engineered for signal integrity, electrical isolation, and mechanical durability, the NFSBT02 ensures reliable data transfer over long field communication lines. Its robust internal terminator minimizes signal reflection, ensuring accurate and stable digital communication between field devices and control systems. The T-joint is compact, easy to install, and built to Yokogawa’s strict industrial standards, making it a key component for maintaining network performance and reliability in distributed control systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Modèle | NFSBT02 |
| Product Type | SB Bus T-joint with Built-in Terminator |
| Electrical Resistance (Terminator) | 100 Ω ± 1% |
| Maximum Voltage | 30 V DC |
| Rated Current | 50 mA |
| Insulation Resistance | > 100 MΩ (at 500 V DC) |
| Dielectric Strength | 500 V AC for 1 minute between circuits |
| Contact Resistance | < 20 mΩ |
| Conductor Material | Nickel-plated copper |
| Connector Type | SB Bus standard connector (Yokogawa proprietary) |
| Bus Configuration | Main bus to branch (T-type) |
| Operating Temperature | -20 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity Range | 0–95% RH (non-condensing) |
| Housing Material | Flame-retardant industrial-grade polycarbonate |
| Mounting Type | Direct bus line connection / DIN-rail adaptor optional |
| Dimensions (L × W × H) | 100 × 35 × 25 mm |
| Poids | 0.3 kg |
| Compliance | CE, RoHS, EMC Directive |
| Protection | ESD, surge, and short-circuit protection |
| Applicable Bus System | Yokogawa SB Bus and Field Control Networks |
Applications
The NFSBT02 SB Bus T-joint with Built-in Terminator is widely used in Yokogawa distributed control and field instrumentation systems that rely on the SB bus or similar field communication architectures. Its primary function is to ensure proper network branching and signal termination to maintain stable data exchange and prevent reflections or noise interference.
Typical application scenarios include:
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Fieldbus connection nodes between sensors, transmitters, and controllers.
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SB bus branch points in Field Control Unités and I/O networks.
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DCS communication infrastructure for Yokogawa CENTUM or ProSafe systems.
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Plant automation networks requiring stable long-distance digital transmission.
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Factory instrumentation wiring, ensuring signal continuity and impedance matching.
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System retrsurits where additional devices are added to existing SB bus structures.
Through its integrated termination and robust design, the NFSBT02 simplifies wiring, improves signal quality, and reduces the need for external termination hardware.
Advantages
The Yokogawa NFSBT02 SB Bus T-joint with Built-in Terminator provides multiple functional and operational advantages for modern industrial network systems:
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Integrated Terminator Design: Combines bus connection and termination in one unité, reducing installation complexity.
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Signal Integrity Assurance: Prevents reflection and interference through precisely matched 100 Ω termination.
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High Reliability: Designed and tested to Yokogawa’s industrial standards for long-term field performance.
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Compact and Lightweight: Enregistrers panel space and simplifies system wiring.
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Excellent Electrical Protection: Built-in surge, ESD, and overvoltage protection for stable operation.
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Durable Construction: Resistant to vibration, temperature fluctuations, and moisture.
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Easy Installation: Snap-fit connection ensures quick integration with Yokogawa SB bus systems.
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Low Maintenance: No external resistor or additional wiring required.
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Compatibility: Works with all Yokogawa SB bus-based products, including FCUs and remote I/Os.
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Improved Network Stability: Ensures consistent impedance across the network, reducing data loss and communication errors.
FAQ
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What is the resistance value sur the built-in terminator?
The built-in terminator provides a precise 100 Ω ± 1% resistance for optimal impedance matching. -
Can the NFSBT02 be used on both ends sur the bus line?
Yes, one terminator is required at each end sur the bus line; the NFSBT02 can serve as one sur these end-point terminators. -
Does the unité support signal isolation between main and branch lines?
The internal design minimizes interference and maintains electrical isolation through robust connector shielding. -
What type sur connector does the T-joint use?
It uses a Yokogawa SB Bus standard connector designed for quick and reliable field installation. -
How does the built-in terminator affect communication stability?
It suppresses signal reflection, ensuring proper waveform shaping and reducing bit errors in digital communication. -
Is the T-joint suitable for use in hazardous environments?
While not intrinsically safe by itself, it can be used within approved enclosures in Zone 2 or non-hazardous areas. -
What is the recommended current limit when connecting multiple T-joints?
The total bus load should not exceed 50 mA per segment to ensure signal quality and compliance with SB bus specifications. -
How is the device mounted or fixed in place?
It can be directly connected inline on the bus cable or optionally secured on a DIN rail using a clip adaptor. -
Can it be used for retrsuritting older Yokogawa systems?
Yes, it is backward compatible with previous SB bus network configurations and connection standards. -
What protections are integrated into the NFSBT02 design?
It includes ESD, surge suppression, and short-circuit protection to safeguard against network disturbances.
Related Modèles (Same Series or Compatible)
| Modèle | Description |
|---|---|
| NFSBT01 | SB Bus T-joint (without built-in terminator) |
| NFSBT02 | SB Bus T-joint with built-in 100 Ω terminator |
| NFSBC01 | SB Bus cable connector for main bus |
| NFSBP01 | SB Bus power coupler unité |
| NFSBL01 | SB Bus line connector for long-distance transmission |
| NFSBA01 | SB Bus adapter for field connection and branching |
Popular Modèles (Same Marque)
| Modèle | Description |
|---|---|
| F9342AL | Pressure Transmitter CPU Assembly for HART protocol |
| F9340GP | Fluorinated Rubber Gasket (degreased) |
| F9341JP | O-Ring for transmitter cover sealing |
| NFAI141 | Analog Input Module for Field Control Unité |
| NFCP400 | CPU Module for Yokogawa Control Systems |
| EJA110E | Differential Pressure Transmitter with HART communication |
Informations sur l'entreprise
E-mail: [email protected]
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Add: Alishan Building, 2 Lvling Rd, District Siming, Xiamen, Fujian, Chine, 361006
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