Description
The ALSTOM SCN804D is a Measure Interface Module designed for ALSTOM industrial control and automation systems. It provides measurement signal interface and processing functions, allowing field measurement signals to be collected, conditioned, and transferred to the control system. The module is associated with ALSTOM SCN604A and SCN606 system configurations and is identified with part numbers including 3BE700139B and L0D426804.
The SCN804D is used in industrial and power generation control environments where reliable measurement acquisition and interface management are required. It is commonly maintained as a replacement spare for legacy ALSTOM control platforms.

SCN804D
⚙️ Product Features
• Designed for ALSTOM industrial automation and control systems.
• Functions as a measurement signal interface module.
• Provides signal conditioning and communication between field devices and control systems.
• Supports integration with ALSTOM SCN604A / SCN606 related configurations.
• Suitable for power generation and industrial process applications.
• Provides reliable measurement data transmission and monitoring.
• Modular design for easier maintenance and replacement.
• Used in legacy ALSTOM control system installations.
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | ALSTOM |
| Model | SCN804D |
| Series | ALSTOM SCN Control System |
| Product Name | Measure Interface Module |
| Place of Manufacture | France / Europe |
| Product Status | Used / Tested Replacement Spare |
| Dimensions | Approx. 300 × 220 × 50 mm |
| Weight | Approx. 2.45 kg |
| Country of Origin | France |
| Power Requirements | 24 VDC Control System Supply |
| Discontinued | Legacy ALSTOM module, available through industrial spare parts channels |
❓ Frequently Asked Questions
🔹 Q: What is the main function of ALSTOM SCN804D?
A: The SCN804D provides measurement interface functions, processing incoming measurement signals and transferring data to the ALSTOM control system.
🔹 Q: Is SCN804D a PLC CPU module?
A: No. It is a measurement interface module used for signal processing and system communication.
🔹 Q: Which systems use the SCN804D?
A: It is associated with ALSTOM SCN control platforms, including SCN604A and SCN606 configurations.
🔹 Q: What type of signals can this module handle?
A: The module is designed for industrial measurement interface functions, handling signals from connected field measurement devices.
🔹 Q: What industries use this module?
A: Typical applications include power plants, industrial automation systems, process control installations, and energy equipment.
🔹 Q: What should be checked before replacement?
A: Verify the exact model number, hardware revision, wiring connections, rack configuration, and compatibility with the existing ALSTOM control system.
🔹 Q: What is the difference between SCN804D and SCN804C?
A: They are different hardware versions within the same SCN804 family. Replacement depends on the installed system configuration and required part number.
⭐ Recommended ALSTOM Related Models
- ALSTOM SCN804C – Measure Interface Module.
- ALSTOM SCN604A – Control Interface Module.
- ALSTOM SCN606 – Measurement Control Module.
- ALSTOM SCN803 – Interface Module.
- ALSTOM SCN805 – Control Interface Module.
- ALSTOM L0D426804 – Measure Interface Assembly.
- ALSTOM 3BE700139B – SCN804D Interface Module.
- ALSTOM 3BE700137B – SCN804C Interface Module.
- ALSTOM C264 – Protection and Control Module.
- ALSTOM C266 – Automation Control Module.
- ALSTOM SDK-C0147 – Control Module Card.
- ALSTOM SDK-C0167-1 – Control Module Card.
- ALSTOM P80 – Protection Relay Module.
- ALSTOM MiCOM P343 – Generator Protection Relay.
- ALSTOM MICOM P746 – Differential Protection Relay.
