ALSTOM

ALSTOM NRD108031 TRVC070999000 BOTTOM Processor Bottom Board

Brand: ALSTOM (France)

Order Part Number: NRD108031

PCB Hardware Revision: TRVC070999000

Designation: BOTTOM (Bottom board of dual‑stack VME assembly)

Product Background

This circuit board belongs to VME‑bus dual‑stack processor assembly for ALSTOM GEM80 turbine control system. The full assembly consists of top main board and this BOTTOM lower base board.

‑ NRD108031: Spare‑part order reference number for procurement & customs declaration.

‑ TRVC070999000: PCB hardware revision code.More products: www.plcva.com

‑ BOTTOM: Denotes lower base board of dual‑stack assembly. It must work paired with corresponding top board and cannot operate standalone.

This is EOL obsolete spare part for legacy power‑plant units, original manufacturing discontinued. Available stock is mainly used / refurbished units for GEM80 system maintenance of thermal & gas‑fired power plants.

Equipped with SRAM, EPROM and bus decoder circuitry, VME slot‑in form factor for sub‑rack installation.

ALSTOM NRD108031 TRVC070999000 BOTTOM Processor Bottom Board

Model Breakdown

1. ALSTOM: Brand, France
2. NRD108031: Complete set ordering part number (primary reference for purchase & customs)
3. TRVC070999000: PCB hardware revision number
4. BOTTOM: Marking for lower base board in dual‑stack assembly

ALSTOM NRD108031 TRVC070999000 BOTTOM Processor Bottom Board

Main Functions

1. Low‑level data processing & storage On‑board SRAM static RAM and EPROM firmware memory for data buffering and firmware storage. Cooperates with top main CPU board to support 8‑bit /16‑bit /32‑bit multi‑width data access.
2. VME‑bus interface decoding VME backplane bus signal decoding and signal driving, realizing address & data communication between top CPU board and rack backplane.
3. I/O bus expansion driver Acts as lower base board to expand I/O channels, forwards control commands and acquires field feedback signals, serves as signal bridge between upper CPU board and backplane I/O modules.
4. Built‑in hardware diagnosis Basic self‑test logic supported, on‑board LED status indicators for fault diagnosis.

Important Note: This BOTTOM base board cannot run independently. It shall be stacked and paired with matching top main board to form complete processor assembly.

ALSTOM NRD108031 TRVC070999000 BOTTOM Processor Bottom Board

Applications

1. Thermal / gas‑fired power plant turbine GEM80 control system (primary use) Installed inside turbine control cabinet of power‑generation units. It functions as lower base board of dual‑stack processor assembly, participating in turbine speed, valve and protection logic computation & signal handling. Classified as critical spare part for turbine control system.
2. VME slot‑in board for sub‑rack mounting, only compatible with ALSTOM GEM80 control system, not interchangeable with third‑party DCS hardware.
3. Applied exclusively for maintenance & replacement of legacy power‑generation units, not specified for new‑project design.

Understand the lowest price, please contact via email: plcvarious@foxmail.com

More products: www.plcva.com

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