Alstom ALE111-S50

Product Overview

ALE111-S50 is a DCS rack-mounted Ethernet communication coupler facilitating 10 Mbps 10Base-T data exchange between CENTUM VP FCU field control units and remote plant monitoring stations over standard copper twisted-pair Ethernet wiring. It is deployed for non-hazardous general industrial control cabinet environments without corrosive gas exposure.
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Description

Core Technical Specifications

  1. Ethernet Standard: IEEE 802.3 10Base-T fixed speed half-duplex operation
  2. Port Configuration: Single RJ45 female copper Ethernet interface
  3. Maximum Cable Segment Length: 100 m unshielded twisted pair
  4. Backplane Bus Compatibility: Yokogawa ESB internal DCS high-speed bus
  5. Backplane Power Draw: 0.35 A DC nominal operating current
  6. Operating Temperature Range: 0 °C to +60 °C
  7. Relative Humidity Operating Limit: 5% to 90% non-condensing
  8. Ingress Protection Class: IP20 indoor cabinet use only
  9. Module Physical Mass: 0.3 kg
  10. Mechanical Standard: Yokogawa FIO series modular rack card footprint

Functional Features

  1. Bidirectional protocol translation between ESB proprietary DCS bus and standard Ethernet frames
  2. On-board hardware packet error detection and automatic frame retransmission
  3. Front-panel tri-color LED indicators for power status, link connection, transmit/receive activity, bus fault
  4. Hot-swappable rack insertion without interrupting FCU main control logic operation
  5. Configurable data transmission filtering to reduce unnecessary network broadcast traffic

Working Principle

Process control data originating from the FCU main controller travels via the ESB rack backplane bus to the ALE111-S50 integrated protocol conversion chip. The chip repackages ESB bus structured data into standard IEEE 802.3 Ethernet frames for transmission to remote HMI, historian, or secondary control nodes. Inbound Ethernet data frames undergo reverse protocol formatting before transmission back to the FCU over the ESB bus. Built-in hardware error checking rejects corrupted data packets to prevent invalid control signal propagation across the DCS network.

Material & Structural Characteristics

  • PCB substrate: Standard FR-4 circuit board without anti-corrosion conformal coating
  • Outer housing: Gray extruded aluminum alloy with vertical convection cooling slots
  • RJ45 connector: Gold-plated modular jack with integrated cable strain relief bracket
  • Rack backplane connector: Gold-plated spring contact edge connector for secure bus connection

Core Advantages & Highlights

  1. Compact modular design minimizes rack cabinet space occupation
  2. Native seamless integration with all Alstom-supplied Yokogawa CENTUM VP DCS platforms
  3. Hot-swap hardware replacement eliminates full control system shutdown for maintenance
  4. Built-in network fault diagnostic LEDs reduce field troubleshooting time
  5. Low nominal power draw avoids excessive cabinet thermal load accumulation

Applicable Industries

General thermal power plant non-hazardous control rooms, municipal water treatment central control, food and beverage manufacturing automation, cement plant central monitoring, non-classified chemical auxiliary control rooms

Installation Mandatory Requirements

  1. Install within designated ESB bus rack slots adjacent to EC401 ESB bus coupler modules
  2. Separate Ethernet signal wiring from high-current power cables by minimum 10 cm physical distance
  3. All Ethernet cable shielding must connect to single-point cabinet protective earth ground
  4. Maintain cabinet internal ambient temperature below 60 °C for continuous rated operation
  5. Confirm full ESB bus backplane contact integrity after every module insertion operation

Operation & Maintenance Precautions

  1. Strictly prohibited for installation within Zone 0/1/2 hazardous classified explosion-risk environments; select ALE111-SE0 explosion-proof variant for hazardous areas
  2. Do not expose spare modules to corrosive sulfur, chlorine, or ammonia industrial gas atmospheres
  3. Perform RJ45 port pin continuity inspection every 12 months of continuous operation
  4. Reboot connected FCU controller upon sustained bus communication fault LED activation
  5. Avoid installing high heat-generating power modules immediately adjacent to ALE111-S50 to prevent overheating-induced packet loss
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