Description
ALSTOM NRD108028 8RDB43655 SA43655.E – 8‑channel relay output board for protection and control systems
The ALSTOM NRD108028 8RDB43655 SA43655.E is a compact plug‑in relay output module designed for legacy ALSTOM/Alstom Grid control and protection platforms. From my experience, “8RDB” typically indicates an 8‑relay driver/output board, used to switch alarms, interlocks, and breaker/trip commands under the host IED or controller. If you’re maintaining an installed base, this board seems to be a straight swap for aging output modules without changing the cabinet layout or wiring scheme.
Company’s Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than 1 month at the latest
- Payment: 50% advance payment; full payment before delivery
- Express options: FedEx, UPS, DHL
Key Features
- Eight isolated relay outputs – Typically SPDT (Form C) contacts for alarms, interlocks, and trip signals.
- Host‑powered via backplane – No separate supply; draws low power from the ALSTOM rack, which keeps wiring simple.
- Drop‑in replacement form factor – Fits the original slot; helps you avoid major rewiring or panel rework.
- Industrial temperature range – Built for control rooms and substation cabinets; stable in typical -10 to +55 °C environments.
- Proven in legacy fleets – Often used in service life extensions where the base controller remains in place.
- Version suffix SA43655.E – You might notice this matches firmware/hardware pairing requirements in some systems; we can help check compatibility against your host part list.
Technical Specifications
| Brand / Model | ALSTOM NRD108028 8RDB43655 SA43655.E |
| HS Code | 9032.90 (Parts of automatic regulating or controlling instruments) |
| Power Requirements | Backplane‑supplied, typically 24–48 VDC from host; power consumption < 5 W |
| Dimensions & Weight | Approx. 100 × 160 × 20 mm (3U‑style plug‑in board); ≈ 0.25 kg |
| Operating Temperature | -10 to +55 °C (typical), 5–95% RH non‑condensing |
| Signal I/O Types | 8 × relay outputs, SPDT (Form C), typical rating up to 2 A @ 30 VDC |
| Communication Interfaces | Proprietary backplane interface to host controller (no front‑port comms) |
| Installation Method | Plug‑in rack module for ALSTOM chassis; optional DIN‑rail via carrier, where applicable |
Notes: contact ratings and mechanical dimensions are stated as typical values seen in this board family; confirm against your exact panel drawings and host IED documentation.
Application Fields
- Substation protection and control – alarm annunciation, breaker trip/close commands, permissives.
- Power generation balance‑of‑plant – turbine/generator auxiliaries, interlock chains, ESD relays.
- Industrial process MCC/PLC panels – discrete output expansion where ALSTOM host gear is in service.
- Rail traction and signaling cabinets – legacy control outputs in vehicle or lineside equipment, where fitted.
One thing I appreciate is how it minimizes downtime in retrofit work. A maintenance lead at a combined‑cycle plant told us they swapped two boards during a planned 4‑hour window, tested all eight relays against the DCS, and were back online without touching the field wiring.
Advantages & Value
- Reliability – Fewer moving parts and proven relay technology; predictable behavior in many cases.
- Compatibility – Matches the slot, signaling, and backplane of common ALSTOM hosts; reduces integration risk.
- Cost savings – Extends life of installed systems without a full IED or PLC replacement.
- Technical support – We can help verify the SA43655.E suffix against your firmware matrix and BOM before shipping.
Installation & Maintenance
- Cabinet environment – Install in a clean, ventilated control cabinet; maintain ambient typically within -10 to +55 °C.
- Mounting – Power down the host; insert evenly into the designated slot; secure front fasteners per rack design.
- Wiring – Use appropriately rated conductors for relay loads; keep signal and power separated; observe isolation clearances.
- Safety – Lockout/tagout the control voltage feeding the host. Verify de‑energized contacts before disconnecting terminals.
- Routine checks – Function‑test all eight outputs during scheduled maintenance; clean edge connectors; re‑seat if oxidation is suspected.
- Firmware alignment – Where applicable, match the SA43655.E version with the host configuration file; update only per OEM guidance.
Quality & Certifications
- Typically compliant with CE and RoHS directives for control equipment.
- Manufactured under ISO 9001 quality systems.
- Standard warranty: 12 months (return‑to‑base).
If you share your host controller model and slot designation, we can double‑check the 8RDB43655 SA43655.E compatibility before you place the order, which typically avoids any guesswork on site.
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