ALSTOM NRD109475 8RDA44670G01 | SA44670.E Control Card

Description

Product Overview

The ALSTOM NRD109475 8RDA44670G01 SA44670.E is a legacy ALSTOM control board designed for installation within compatible rack-based industrial control or protection equipment. Available identification records consistently group the three designations—NRD109475, 8RDA44670G01, and SA44670.E—under the same control-module assembly. Its role is not comparable to a conventional standalone PLC CPU: the board operates as part of a larger ALSTOM hardware architecture, with system power and internal signal paths provided through the host rack/backplane.

From a maintenance standpoint, the ALSTOM NRD109475 8RDA44670G01 should be treated as a system-dependent electronics assembly. Available technical descriptions characterize it as a plug-in, backplane-powered board, meaning that the cabinet’s rack, slot assignment, mating connector, and associated control architecture are part of the compatibility equation. This matters when planning a legacy control-system replacement: matching the printed part number is necessary, but not always sufficient. Hardware revision, board suffix, rack type, firmware or configuration dependencies, and the function assigned to the original slot should also be checked.

The ALSTOM SA44670.E designation is particularly useful when cross-referencing older cabinet documentation because it appears alongside both NRD109475 and 8RDA44670G01 in legacy ALSTOM product records. Published third-party specifications for voltage, temperature, dimensions, and communications are inconsistent, so those values should not be presented as confirmed design specifications without the original ALSTOM documentation or nameplate. That is the practical approach for a safety- or process-critical spare.

Key Technical Specifications

Technical caution: One secondary listing claims 5 V DC input, 3.3 V DC output, and 1 A output, while another gives 220 V and 30 kHz figures. These specifications are clearly inconsistent with one another and should not be used for engineering design or procurement.

A separate source describes the assembly as backplane-powered and specifically notes that no direct user power connection is normally required at the board. That description is more consistent with the identified plug-in control-board architecture.

NRD109475

Related Products

• ALSTOM NRD108034 / 8RDB44674G01 / SA44674.C — Related ALSTOM control-module identification. It belongs to the same broad legacy hardware ecosystem but has a different board designation; do not substitute without a system-level compatibility check.
• ALSTOM NRD108033 / 8RDC44667G01 / SA44667.C — Another legacy ALSTOM control module. Useful as a related spare reference, but the different NRD and SA numbers indicate a different board function or hardware revision.
• ALSTOM NRD108028 / 8RDB43655 / SA43655.E — Related control/safety module. It may occupy a similar rack environment, but its electrical and functional assignment must be verified before replacement.
• ALSTOM SDK-C0167-1 / 12004-08-01 / SBS07M076B — Legacy ALSTOM control-module family member. It uses a different identification structure and should be regarded as an alternative architecture rather than a direct substitute.
• ALSTOM SDK-C0148 / 12003-101-01 / SBS05M09B — Another legacy control module found in the same ALSTOM product ecosystem. Relevant when maintaining older ALSTOM control cabinets, but not a drop-in replacement for .
• ALSTOM 42011-106-00 A01 / ITC_VIOM_VIOC — Control/interface hardware from the same legacy ALSTOM ecosystem. Its function is oriented toward the VIOM/VIOC architecture rather than serving as a direct replacement for SA44670.E.
• ALSTOM N897093511D / N897093051D / DIAGNOSTICA — Diagnostic hardware used within compatible ALSTOM systems. It is complementary to control electronics rather than a replacement control board.

Frequently Asked Questions

1. What is ALSTOM 8RDA44670G01 .E used for?

It is a plug-in control board for compatible legacy ALSTOM control and protection systems. Available records identify it as an industrial control module and associate all three numbers with the same assembly.

Its actual function depends on the host ALSTOM system and rack configuration, so I would not assign a specific PLC-style I/O count without the cabinet documentation.

2. Can I replace with another ALSTOM control board?

Not based on physical dimensions alone.

Before substitution, compare:

• Complete part number
• SA designation
• Hardware revision
• Rack type
• Slot assignment
• Backplane connector
• System configuration
• Firmware/configuration requirements
• Board function in the original cabinet

The related NRD108034 and NRD108033 boards may look similar but carry different identification numbers and should not be assumed interchangeable.

3. Does this support firmware v3.1?

There is insufficient reliable documentation to confirm a specific firmware v3.1 relationship for .

For a field replacement, capture the installed board’s revision and the host system’s software/configuration revision before removing the original. A matching hardware part number does not automatically mean that every revision is interchangeable.

4. Can I hot-swap the ?

Do not assume that it is hot-swappable.

Although the board is described as a plug-in rack module, the host system may not permit energized insertion or removal.

A controlled replacement should include:

1. Identify the affected rack and slot.
2. Place the process/system in the approved maintenance state.
3. Isolate power as required.
4. Record board identification and configuration.
5. Remove the existing board using ESD precautions.
6. Install the matching revision.
7. Restore power under controlled conditions.
8. Verify diagnostics and system status.

5. Will replacing cause me to lose my control logic?

The board itself should not be treated as equivalent to a PLC program-storage device.

The bigger concern is system configuration and board-specific parameters. If the host ALSTOM system stores configuration externally, replacement may require little or no logic restoration. If parameters or calibration information are associated with the board, they may need to be restored.

For a critical system, document the original board state before replacement.

6. What is the difference between , 8RDA44670G01, and .E?

Based on the available product records, these are three identifiers associated with the same ALSTOM board:

• — primary model/part identification
• 8RDA44670G01 — ALSTOM hardware part number
• — board/type designation

Multiple ALSTOM product listings group these three identifiers together.

When purchasing, provide all three numbers. That reduces the risk of receiving a visually similar but functionally different legacy board.

7. How should I verify a New Surplus ?

For this particular board, physical and documentary verification should include:

• marking
• 8RDA44670G01 part number
• designation
• Hardware revision
• PCB revision
• Connector/backplane condition
• Component condition
• Rack compatibility
• Power-up test in an approved test environment
• Diagnostic/status verification
• Configuration compatibility

Procurement judgment: I would not accept generic claims such as “220 V input,” “3.3 V output,” or “30 kHz frequency” as specifications for this board. Published listings contain contradictory values, while the more consistent evidence identifies it as a backplane-powered ALSTOM plug-in control board.