Product Overview

• Part No: I/OBE2, 12004‑104‑00, V1.0.0
• Brand: ALSTOM

• Category: I/OBE2 Mixed I/O Bus Extension ModuleI/OBE2 12004‑104‑00 V1.0.0 is a standard Eurocard plug‑in bus coupler module for ALSTOM SBS serial‑bus remote I/O system. V1.0.0 stands for the embedded firmware version.This module acts as a communication bridge between the main control rack and distributed remote I/O units. It processes SBS bus protocol signals, expands system I/O capacity, and handles data exchange for local digital and analog I/O boards installed in the same sub‑rack. It provides signal buffering, electrical isolation and bus termination functions to guarantee stable long‑distance data transmission in noisy power‑plant environments. Front‑panel LEDs show bus activity, module running state and communication faults for quick on‑site diagnostics. As an obsolete original maintenance spare, it is commonly used for retrofitting and overhauling steam‑turbine governing systems in thermal and combined‑cycle power plants.

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Core Features

• SBS serial‑bus coupler for connecting main controller to remote I/O sub‑racks
• Signal buffering, bus termination and galvanic isolation for communication circuits
• Supports mixed digital & analog I/O signal data forwarding within sub‑rack
• Front‑panel LED indicators for module status, bus traffic and communication error
• Standard Eurocard draw‑out structure for fast field replacement
• Reinforced multilayer PCB with gold‑plated edge connectors for anti‑vibration performance
• Integrated ESD, transient surge suppression and EMI noise filtering

• Passed EMC, vibration and wide‑range thermal cycling reliability qualification

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Technical Specifications

• Operating Supply: 24 VDC backplane power
• Firmware Version: V1.0.0
• Operating Temperature: -10°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Standard Eurocard rack plug‑in printed circuit board

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Compatible with ALSTOM SBS serial‑bus based turbine governing remote I/O architecture
• Widely deployed in thermal power plants, combined‑cycle power stations and captive power facilities
• Used for bus extension and data routing between main control rack and distributed field I/O sub‑racks