ALSTOM LE109A-1 – Signalling Interface Module for Interlocking and Wayside Control

The ALSTOM LE109A-1 is a plug-in signalling module commonly deployed in interlocking racks and wayside cabinets. From my experience, this card is used where dependable, deterministic I/O handling and line encoding are needed between trackside equipment and the core signalling logic. You might notice that it’s built for long service life in harsh rail environments—stable power behavior, noise immunity, and clean isolation typically stand out in field use.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Rail-grade design – Built for wayside and signal house deployment with robust EMC behavior and isolation in many cases.
• Deterministic I/O handling – Stable response for interlocking logic where timing consistency matters.
• Backplane connectivity – Plug-in card architecture that integrates into ALSTOM racks; quick swap reduces downtime.
• Line encoding/signalling interface – Supports discrete and encoded signalling typical to railway applications.
• Service/diagnostic access – Usually provides a simple serial/service interface for commissioning and checks.
• Maintenance-friendly – Front extraction and clear status indication simplify on-site replacement.

Technical Specifications

Application Fields

• Station and yard interlocking cabinets where reliable discrete I/O and line encoding are required.
• Wayside control for signals, points, and track circuits in mainline or metro environments.
• Interface bridging between trackside equipment and central interlocking logic.
• Modernization projects replacing legacy cards in existing ALSTOM racks.

Advantages & Value

• Drop-in compatibility – Keeps the existing rack and wiring; reduces re-engineering effort.
• High service uptime – Plug-in design and clear status aids shorten mean time to repair.
• Lifecycle continuity – Suitable for long-term support strategies in regulated rail projects.
• Cost control – Minimizes new approvals and site work versus full subsystem replacement.
• Technical support – Assistance with identification, firmware level checks, and module pairing.

Installation & Maintenance

• Cabinet environment – Install in a dry, ventilated signal house/wayside cabinet. Maintain ambient within the extended range typical for rail equipment.
• Power & grounding – Use a clean 24 VDC supply with proper earthing. Separate power and signal cabling to reduce interference.
• Wiring – Follow the rack backplane pinout and use shielded cable for field lines. Verify isolation and polarity before energizing.
• Safety – De-energize the rack before insertion/removal. Observe lockout/tagout and site access rules.
• Routine care – Periodic dust removal, connector inspection, and fastener checks. Firmware/config revisions (when applicable) should be change-controlled.
• Spares strategy – Keep at least one tested spare per site or region to cover planned works and contingencies.

Quality & Certifications

Rail signalling equipment from this family is typically supplied with CE conformity and built under ISO 9001 quality systems. Depending on project scope and integration, compliance with relevant railway standards (such as EN 50126/50128/50129 for safety-related systems) may apply. RoHS adherence is commonly observed for electronics of this class.

Warranty coverage provided here is 365 days. If you need a specific certificate set or a module build code check, we can verify against your rack part numbers and site documentation before shipment.

Supporting Components

• Compatible backplane/rack frames for ALSTOM interlocking cabinets
• 24 VDC rail-grade power supplies and surge protection
• Shielded field cable assemblies and terminal adapters
• Service/diagnostic serial leads for commissioning