Product Core Brief
- Models: NRD109475 / 8RDA44670G01 / SA44670.E
- Brand: ALSTOM
- Series: ALSTOM Plug-In Control Board Family
- Core Function: Plug-in control board used in legacy ALSTOM rack systems for signal processing, I/O coordination, and subsystem control; exact channel map and protocol depend on installed build.
- Product Type: Control Board / Plug-In Rack Module / Legacy Control Card
- Key Specs: Backplane-supplied low-voltage DC power | Proprietary ALSTOM backplane bus | Plug-in rack installation | Revision-dependent I/O and firmware | Exact channel count, supply voltage, and communication depend on installed build
- Condition: New Original / New Surplus
Product Introduction
ALSTOM NRD109475 8RDA44670G01 SA44670.E is an ALSTOM plug-in control board referenced in spare-part channels for legacy ALSTOM rack-based control and protection systems. It is typically installed as a rack-mounted PCB inside an ALSTOM host chassis, protection cabinet, or auxiliary control rack.
The module receives input signals, processes them according to predefined logic or algorithms, and outputs control signals to drive actuators or downstream equipment. It communicates with the host system through a proprietary ALSTOM backplane bus and normally does not carry independent Ethernet, PROFINET, DeviceNet, or front-panel serial ports. Some third-party listings describe this part with Ethernet/IP, PROFINET, DeviceNet, or REX-INTRO-V HMI compatibility; those features are not confirmed by official ALSTOM documentation and should not be used as the sole basis for replacement.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Full Model | ALSTOM NRD109475 8RDA44670G01 SA44670.E |
| Product Type | Plug-in control board / rack module |
| System Platform | ALSTOM legacy rack-based control and protection systems |
| Core Function | Signal processing, I/O coordination, subsystem control |
| Supply Voltage | Backplane-supplied low-voltage DC; confirm from installed nameplate |
| Communication | Proprietary ALSTOM backplane bus; front ports typically not present |
| Installation | Plug-in rack module for ALSTOM chassis |
| Operating Temperature | 0 to 55°C, cabinet-mounted, non-condensing; depends on system design |
Quality Control Process
- Visual and code check: Confirm NRD109475, 8RDA44670G01, and SA44670.E markings, revision code, and connector condition.
- Nameplate verification: Confirm function label, supply voltage, firmware/revision, and compatible ALSTOM chassis.
- Backplane interface check: Inspect plug-in connectors, pin alignment, and chassis slot compatibility.
- Functional check: Verify power-up, status indicators, host recognition, and I/O behavior where test fixtures allow.
- Final packing: Record test results, apply asset labels, and ship with connector and PCB protection.
Replacement Pitfall Guide
❗ Confirm all three identifiers. NRD109475, 8RDA44670G01, and SA44670.E are commonly listed together; still, verify the exact revision.
❗ Do not treat it as a confirmed Ethernet/IP, PROFINET, or DeviceNet controller. Those protocol claims appear in third-party listings but are not confirmed by official ALSTOM documentation.
❗ Do not assume HMI compatibility. References to REX-INTRO-V or other HMI systems are not confirmed native specifications for this board.
❗ Verify the installed function label. The same code family may be used in different ALSTOM cabinet builds with different I/O maps.
❗ Check chassis and slot type. The board must match the ALSTOM plug-in slot, backplane pinout, and host configuration.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| ALSTOM NRD109475 8RDA44670G01 SA44670.E | Same revision | Direct | Like-for-like when revision, chassis, slot, and host configuration match. |
| ALSTOM | Other ALSTOM control board | Needs Adaptation | Confirm function label, backplane type, I/O mapping, and firmware. |
| ALSTOM control board | Relay output or communication adapter | Not Recommended | Function and interface are typically incompatible. |
| ALSTOM control board | Modern controller/I/O module | Needs Adaptation | Requires I/O review, wiring changes, and commissioning support. |
- Typical use: Power generation auxiliary control, electrical substation and protection cabinets, heavy industrial process control racks, rail traction power auxiliaries, legacy ALSTOM host gear, and form-fit-function spare replacement.
- Key verification points: NRD109475 / 8RDA44670G01 / SA44670.E revision, function label, supply voltage, chassis model, slot position, backplane interface, and host I/O map.
