Products Description
ALSTOM LE109A-1 Communication Control Module in stock
ALSTOM LE109A-1 is a rack-mounted communication control module for ALSTOM ALSPA DCS system. It serves as the data exchange gateway between the main controller and field I/O modules, responsible for bus data transmission, protocol conversion and signal scheduling of the control rack.

This module adopts industrial-grade circuit design with built-in communication fault detection and data error correction function. It is a discontinued legacy spare part, widely used for maintenance replacement of old thermal power plant turbine control and power automation systems.
Main Specifications
| No. | Item | Parameter |
|---|---|---|
| 1 | Brand | ALSTOM |
| 2 | Model | LE109A-1 |
| 3 | Module Type | Communication Control Module |
| 4 | Function | Backplane bus communication & data gateway |
| 5 | Power Supply | 24VDC |
| 6 | Mounting | Rack mount, backplane bus connection |
| 7 | Operating Temperature | -10 ~ +60°C |
| 8 | Status | Discontinued legacy spare part |
Core Functions
| No. | Function Description |
|---|---|
| 1 | Act as internal rack gateway for data exchange between controller and I/O cards |
| 2 | Real-time scheduling and transmission of process data and control commands |
| 3 | Built-in data error correction and communication interruption diagnosis |
| 4 | LED status indicators to display communication running and fault alarms |
| 5 | Coordinate the time sequence of each module in the ALSPA DCS rack |
Application Scenarios
| No. | Application |
|---|---|
| 1 | ALSTOM ALSPA series DCS distributed control rack system |
| 2 | Thermal power plant turbine control and auxiliary machine monitoring system |
| 3 | Power plant distributed data acquisition and interlock control system |
| 4 | Legacy power DCS spare replacement and system upgrade retrofit |
FAQ
| No. | Question & Answer |
|---|---|
| 1 | Q: What is ALSTOM LE109A-1? A: ALSTOM LE109A-1 is communication control module for ALSPA DCS, acting as rack internal data gateway for controller and I/O modules. |
| 2 | Q: What is the core function of LE109A-1? A: It completes high-speed data exchange between the main controller and all I/O cards inside the DCS rack. |
| 3 | Q: What system is this module compatible with? A: It is designed for ALSTOM ALSPA series DCS control platform. |