ALSTOM NRD108028 8RDB43655 SA43655.E 8‑Channel Relay Output Board / Protection Control Module

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    • Product Code: NRD108028 8RDB43655 SA43655.E
    • Availability: In Stock
    ALSTOM NRD108028 / 8RDB43655 / SA43655.E
    Manufacturer: ALSTOM
    Part Numbers: NRD108028, 8RDB43655, SA43655.E
    Type: 8‑Channel Relay Output Board / Protection Control Module
    Function: Isolated relay output, interlocking, protection & alarm signaling
    Status: Discontinued, spare parts only
    NRD108028 / 8RDB43655 / SA43655.E Relay Output Module
    1. General Description
    The ALSTOM NRD108028 (8RDB43655 / SA43655.E) is a high‑reliability, rack‑mounted 8‑channel relay output board for Alstom legacy DCS, turbine control and protection systems. It provides 8 independent, galvanically isolated relay outputs for driving external loads (valves, contactors, alarms, interlocks) in power generation and heavy industry. The part numbers represent the base board (NRD108028), assembly revision (8RDB43655), and circuit schematic reference (SA43655.E).
    2. Key Specifications
    • Module Type: 8‑Channel Isolated Relay Output Board
    • Outputs: 8 × SPST/SPDT relay contacts
    • Contact Rating: 250 VAC / 30 VDC, 5 A resistive
    • Isolation: ≥500 VAC channel‑to‑backplane
    • Power Supply: 24–48 VDC (backplane); consumption <5 W
    • Operating Temp: 0°C ~ +60°C
    • Form Factor: 3U Eurocard (≈100×160×20 mm)
    • Weight: ≈0.25 kg
    3. Part Number Definition
    • NRD108028: Base relay output module part number
    • 8RDB43655: Full assembly / hardware revision code
    • SA43655.E: Circuit schematic / drawing reference
    4. Applications
    • Thermal power plant turbine protection & DCS interlocking
    • Emergency shutdown (ESD) and alarm annunciation
    • Petrochemical, heavy industry & power generation control
    • Replacement spare for Alstom TGP/Alspa legacy racks
    ALSTOM © NRD108028 / 8RDB43655 / SA43655.E 8‑Channel Relay Output Board


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