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| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Introduction
The Yokogawa SSB401 is a high-performance ESB Bus Interface Slave Module used in CENTUM VP and CENTUM CS 3000 distributed control systems (DCS). This module serves as a critical communication link that allows Field I/O (FIO) devices to connect seamlessly with the Field Control Station (FCS) via the Enhanced System Backbone (ESB) bus. Designed for precise and efficient data exchange, the SSB401 ensures real-time communication across various I/O modules distributed throughout an industrial control network.
The SSB401 supports redundant communication paths, enabling highly reliable data transfer between control processors and remote I/O. This module is particularly suited for mission-critical applications, where system availability, fault tolerance, and scalability are non-negotiable.
Compact, robust, and engineered for long-term use in demanding environments, the SSB401 contributes to enhanced system flexibility and increased system uptime by ensuring uninterrupted communication between the control layer and I/O layer.
Product Specifications
| Parameter | Description |
|---|---|
| Model | SSB401 |
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | ESB Bus Interface Slave Module |
| System Compatibility | CENTUM VP, CENTUM CS 3000 |
| Communication Protocol | Proprietary ESB bus (serial, high-speed, deterministic) |
| Bus Topology | Dual-redundant supported |
| Function | Acts as communication interface between FCS and remote I/O |
| Status Indicators | LEDs for Communication, Power, Error |
| Mounting | Baseplate-mounted |
| Power Supply | Supplied from the baseplate (typically 24V DC) |
| Operating Voltage | 24 VDC nominal |
| Isolation | Optical isolation between field signals and bus |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -20°C to +70°C |
| Humidity Range | 10–90% RH (non-condensing) |
| Shock/Vibration Resistance | Compliant with IEC 60068 |
| Certifications | CE, CSA, UL, ATEX, IECEx, RoHS |
| Dimensions (W × H × D) | 130 x 142.5 x 32.8 mm |
| Weight | 0.45 kg |
Product Applications
The Yokogawa SSB401 is integral to control systems that require robust and consistent data communication between field devices and the central controller. Its use spans across multiple industrial sectors, especially where remote I/O nodes are employed for process decentralization.
Typical application scenarios include:
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Oil and Gas Production Facilities – For connecting remote I/O points such as wellheads and separators to central control rooms.
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Chemical and Petrochemical Plants – Facilitates reliable data exchange for hazardous area I/O systems.
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Power Generation Plants – Provides communication between turbine auxiliary controls and central DCS units.
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Water and Wastewater Treatment – Links distributed valve actuators and sensor nodes to centralized operations.
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Pharmaceutical Automation – Ensures timely control signal transfer in cleanroom-based production environments.
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Metallurgical and Mining Operations – Supports rugged remote I/O control under heavy mechanical stress conditions.
The module is particularly useful in redundant network environments and multi-node control topologies.
Product Advantages
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Seamless I/O Integration: Acts as a dedicated communication bridge between remote I/O modules and the control processor.
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Redundancy Capable: Fully supports dual ESB bus paths for fault-tolerant operations.
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Compact and Modular: Installs easily into existing system racks without complex modifications.
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LED Diagnostics: Real-time status monitoring through built-in LEDs enhances maintenance efficiency.
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Stable and Reliable Data Transmission: Designed for deterministic, high-speed communication over industrial distances.
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Electrical Isolation: Optically isolated signals ensure system safety and noise immunity.
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Wide System Compatibility: Integrates effortlessly with CENTUM CS 3000 and VP system architectures.
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Environmental Resilience: Designed for long-term use in industrial environments with high temperature and vibration.
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Low Power Consumption: Draws minimal current, reducing overall system energy requirements.
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Global Compliance: Certified to meet international safety and performance standards.
Frequently Asked Questions (FAQ)
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What is the primary role of the SSB401 module?
The SSB401 enables communication between Field I/O units and the Field Control Station (FCS) over the ESB bus. -
Is the SSB401 compatible with both CENTUM CS 3000 and VP systems?
Yes, it works seamlessly with both Yokogawa platforms. -
Can the SSB401 support redundant ESB buses?
Absolutely. It is designed to operate in dual-redundant ESB communication paths. -
How is this module powered?
It receives 24V DC power via the backplane baseplate connection. -
What kind of diagnostic indicators are included?
LEDs for communication status, power, and error states. -
Can the SSB401 be hot-swapped during operation?
No. The module should be replaced during maintenance shutdown unless redundancy is configured. -
Does it support long-distance communication?
Yes, the ESB protocol is designed for industrial distance communication over shielded cabling. -
What are the environmental limitations for this module?
Operating temperature: 0°C to 55°C; storage temperature: -20°C to 70°C; humidity: 10–90% RH. -
What mounting options are available?
It is baseplate-mounted and fits standard Yokogawa system racks. -
Is this module suitable for hazardous environments?
Yes. It is certified under ATEX and IECEx for use in potentially explosive atmospheres when properly installed.
Related or Same-Series Yokogawa Models
| Model | Description | System Compatibility | Weight |
|---|---|---|---|
| SSB402 | Advanced ESB Slave Module with extended diagnostics | CENTUM VP / CS 3000 | 0.88 kg |
| SEC402 | ESB Bus Coupler Module | FCS to I/O Bus Interface | 0.90 kg |
| SSB403 | Compact Redundant Slave Module | CENTUM CS 3000 | 0.85 kg |
| FIO100 | Distributed I/O Controller | Remote Field Node | 2.00 kg |
| SCP451 | Processor for FCS | CENTUM VP / CS 3000 | 1.20 kg |
| SAI143 | 16-ch Analog Input Module (4–20mA) | FIO System | 0.60 kg |
Popular Yokogawa Models Across the Brand
| Model | Description | Application Area | Weight |
|---|---|---|---|
| CP451 | Vnet/IP Communication Processor | Network Management | 0.90 kg |
| SPW484 | High-Capacity Power Supply Module | Redundant Power Supply Systems | 1.80 kg |
| AAI543 | Analog Input Module (32ch, 1–5V) | Data Acquisition | 0.75 kg |
| ALR121 | Relay Alarm Output Module | Alarm Integration | 0.70 kg |
| FCS1000 | Compact Field Control Station | Medium-Sized DCS Solutions | 2.50 kg |
| NTP100 | Network Time Protocol Synchronizer | System Time Coordination | 0.80 kg |
