Technical Overview
The Yokogawa SB401-10 S1 serves as a bus interface module for the CENTUM VP and ProSafe-RS distributed control systems. This module enables high-speed communication between field control units (FCUs) and I/O nodes via the ESB bus at 10 Mbps. Its 100-meter cable length per segment accommodates large plant layouts with distributed I/O cabinets. The SB401-10 S1 also supports dual-redundant configurations for mission-critical safety applications.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | Bus Interface Module |
| System Compatibility | CENTUM VP, ProSafe-RS |
| Communication Protocol | ESB bus |
| Transmission Speed | 10 Mbps |
| Cable Type | Dedicated ESB cable |
| Maximum Cable Length | 100 m (per segment) |
| Topology | Daisy-chain / Tree |
| Number of Connected Nodes | Up to 64 |
| Scan Cycle | 10 ms |
| Redundancy | Dual-redundant (hot-standby) |
| Failover Time | ≤ 2 seconds |
| Power Supply | 5 VDC (from backplane) |
| Current Draw | 300 mA |
| Diagnostic LEDs | RUN, ERR, COM, ACT |
| Dimensions (H x W x D) | 130 x 40 x 110 mm |
| Weight | 0.55 kg |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -20°C to 70°C |
| Protection Class | IP20 |
| Certifications | CE, CSA |
Communication and Network Architecture
The Yokogawa SB401-10 S1 connects the FCU to remote I/O nodes through the ESB bus, supporting daisy-chain or tree topologies. Its 100-meter cable length per segment accommodates large plant layouts with distributed I/O cabinets, while the 10 ms scan cycle ensures deterministic data exchange for high-speed control loops. Furthermore, this interface module enables expansion up to 64 nodes, providing scalability for growing automation needs.
Redundancy and Fault Tolerance
Dual-redundant operation ensures seamless failover from active to standby modules without any interruption to process data flow. The SB401-10 S1 automatically detects communication faults and switches to the backup path within 2 seconds, maintaining system integrity during hardware failures. This high availability makes the module essential for refining, chemical, and power generation applications.
Diagnostics and System Integration
The SB401-10 S1 provides instant visual feedback through front-panel LEDs for RUN, ERR, COM, and ACT conditions, enabling rapid troubleshooting. The module mounts directly to the CENTUM VP backplane, requiring no additional configuration tools. With its compact dimensions and low current consumption, the interface module offers an efficient and reliable solution for ESB bus connectivity.
Details
| Weight | 0.55 kg |
|---|---|
| Dimensions | 130 × 40 × 110 mm |
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