Description
Product Overview
The ALSTOM NRD108034 8RDB44674G01 SA44674.C is a legacy ALSTOM industrial control/interface board identified by three associated hardware references: NRD108034, 8RDB44674G01, and SA44674.C. Product catalogs consistently list these identifiers together and classify the assembly as an ALSTOM control module or industrial control card. The available evidence does not support treating it as a generic PLC CPU, analog-output card, or standard power supply.
Within a compatible ALSTOM control cabinet, the ALSTOM NRD108034 belongs to the system’s control/interface layer. Its exact function depends on the host architecture, rack position, connected modules, and application configuration. Some secondary descriptions broadly state that the board handles signal processing, logic control, and I/O management, but these descriptions are not sufficiently detailed to establish exact channel counts or electrical ratings. A separate listing incorrectly describes the same part as a power-supply circuit, demonstrating that generic reseller data should not be treated as authoritative.
The ALSTOM SA44674.C identification is especially useful when sourcing a replacement because it provides an additional board-level reference beyond the NRD108034 number. The module appears alongside related ALSTOM NRD hardware such as NRD108028, NRD108031, NRD108033, and NRD109475. That does not mean those boards are interchangeable. Their different board numbers and suffixes should be treated as functional distinctions unless the original system documentation explicitly approves substitution.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ALSTOM |
| Primary Model | NRD108034 |
| Board Number | 8RDB44674G01 |
| Functional/Revision Designation | SA44674.C |
| Product Type | Industrial Control / Interface Module |
| Primary Function | Control and interface processing |
| System Architecture | ALSTOM legacy control system |
| Installation | Rack/backplane dependent |
| Host Interface | System dependent |
| I/O Function | Application dependent |
| Communication Interface | Not reliably confirmed |
| Digital Input Count | Not reliably confirmed |
| Digital Output Count | Not reliably confirmed |
| Analog Channels | Not reliably confirmed |
| Supply Voltage | Not reliably confirmed |
| Power Consumption | Not reliably confirmed |
| Processor | Not reliably confirmed |
| Memory | Not reliably confirmed |
| Firmware | System dependent |
| Operating Temperature | Not reliably confirmed |
| Condition | New Surplus, subject to inspection and functional testing |
Specification caution: One secondary source describes the board as a general control module responsible for signal processing, logic control, and I/O management. Another source labels it a power-supply circuit. Those descriptions conflict. I would therefore not publish specific voltage, current, CPU, memory, or channel-count figures as guaranteed specifications without the applicable ALSTOM drawings.
NRD108034
Related Products
- ALSTOM NRD108028 / 8RDB43655 / SA43655.E — Related NRD control module with a documented relay-output description. It belongs to the same broader ALSTOM hardware family but has different board identification and should not be used as a direct substitute.
- ALSTOM NRD108033 / 8RDC44667G01 / SA44667.C — Closely related NRD control module. Its different board number and C-series designation indicate that application compatibility must be checked before substitution.
- ALSTOM NRD109475 / 8RDA44670G01 / SA44670.E — Another NRD-family control module. It may occupy a related system architecture but has a different hardware identity.
- ALSTOM NRD108031 / TRVC070999000 / BOTTOM — Related control hardware identified as a BOTTOM assembly. It serves a different physical/system role from .
- ALSTOM N895600512D / N895600051C / ECPU_1 / N895600200Q — Central processing hardware. It provides CPU-level processing in another ALSTOM architecture and is not a direct replacement for .
- ALSTOM N897066510E / N897066010M / AOVD / N897066000A — Analog-output module. It handles analog output functions and has a different role from the control/interface board.
- ALSTOM N897163510Q / N897163050Q / MODEM / N897163100U — Communication/modem hardware. It provides communication functions rather than the general control/interface role of .
- ALSTOM N897093511D / N897093051D / DIAGNOSTICA / N897093400H — Diagnostic hardware intended for monitoring and fault information rather than primary control processing.
Frequently Asked Questions
1. What is ALSTOM 8RDB44674G01 SA44674.C?
It is an ALSTOM legacy industrial control/interface module. Multiple product references identify , 8RDB44674G01, and as the same hardware identification.
The exact I/O and control function is system-dependent, so the cabinet drawings should be used to determine its specific role.
2. Is a PLC CPU?
There is not enough reliable evidence to classify it as a standalone PLC CPU.
Some secondary descriptions use broad terms such as “controller” and “control module,” but they do not establish a CPU architecture, processor speed, or memory specification.
For procurement, I would identify it as a control/interface module, not advertise it as a general-purpose PLC processor.
3. Is a power supply?
I would not classify it as a power supply.
One commercial listing does describe it as a power-supply circuit, but that conflicts with other references identifying the same hardware as an industrial control/interface module.
The board’s exact system function should be confirmed from the original ALSTOM cabinet documentation.
4. Can I replace with NRD108033?
Not automatically.
Both appear in ALSTOM’s NRD product listings, but they have different identifiers:
- → 8RDB44674G01 → .C
- NRD108033 → 8RDC44667G01 → SA44667.C
A shared NRD family does not establish electrical or software interchangeability.
5. Can I hot-swap ?
Do not assume hot-swap capability.
The board may participate in control, monitoring, or I/O functions. Removing it under power could interrupt system operation or alter field-interface states.
Unless the specific ALSTOM documentation explicitly authorizes energized replacement, follow the approved shutdown and isolation procedure.
6. Does support firmware v3.1?
There is no reliable evidence establishing firmware v3.1 as a supported universal version for this exact board.
For replacement work, compare the installed board’s hardware revision and firmware/application environment with the spare. A matching part number does not eliminate firmware or configuration compatibility issues.
7. How should I verify a New Surplus ?
Use the complete identification chain:
→ 8RDB44674G01 → .C
Then verify:
- PCB and revision markings
- Connector condition
- Backplane contacts
- Component condition
- Storage damage/corrosion
- Rack position
- Host-system compatibility
- Firmware/configuration
- I/O mapping
- Communication interfaces
- Power-up diagnostics
- Functional response under controlled test conditions
Procurement judgment: The safest technical description is ALSTOM / 8RDB44674G01 / .C industrial control/interface module. Available sources agree on the product identification but provide inconsistent functional and electrical details. For a critical legacy installation, the exact board marking and system-level compatibility should take precedence over generic specifications copied from secondary listings.
