ALSTOM SPU232.2 (029.366.817): Processor Unit for Alspa 6000 DCS
The ALSTOM SPU232.2 (part number 029.366.817) is a rack-mounted single processor unit (SPU) serving as the core processing module for the Alspa Series 6000 distributed control system (DCS) and associated turbine control platforms. Designed for continuous operation in power generation environments, this module executes real-time logic control, signal processing, and inter-module communication via CAN bus and backplane interfaces. As the original ALSTOM power automation business has transitioned through Converteam and subsequently into GE Vernova’s legacy portfolio, the SPU232.2 remains available as a service spare for maintaining existing Alspa 6000 installations in thermal, hydro, and combined-cycle power plants.
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ALSTOM/GE BIO232
ALSTOM/GE SRE232
ALSTOM/GE VCM232
ALSTOM/GE VCS232
ALSTOM/GE DAU232
ALSTOM/GE DAP232
ALSTOM/GE DIZ232
ALSTOM/GE DEP232
ALSTOM/GE SSI232
Key Technical Identity
| Product ID | SPU232.2 / 029.366.817 |
| Product Type | Single Processor Unit (SPU) |
| Compatible Platform | Alspa Series 6000 DCS |
| Communication Interface | CAN 2.0B (galvanically isolated) |
| Mounting | Rack slot-mount (DPUK rack backplane) |
| Typical Weight | Approx. 0.4 kg |
Core Function Within the Control System
The SPU232.2 operates as the local processing core within an Alspa 6000 rack, performing the following primary functions:
Logic Execution: Executes sequence control, interlock protection, and combinatorial logic for power plant auxiliary systems and turbine control sequences.
Signal Processing: Pre-processes digital and analog signals received from I/O modules within the same rack, preparing data for system-level control decisions.
Communication Management: Exchanges data with DIZ232 digital input modules, BIO232.1 output modules, SSI232.1 analog measurement boards, and other I/O cards via the internal CAN bus.
Synchronization Support: In turbine control applications, the module supports generator synchronization logic, including grid-connection condition checking and alarm output based on voltage, frequency, and phase differential measurements.
System Integration and Compatibility
The SPU232.2 is specifically configured for the Alspa Series 6000 platform. It communicates with companion modules through the rack backplane and CAN bus, including:
DIZ232: Digital input module
BIO232.1: Digital output module
SSI232.1: Analog signal measurement board
ICP232: Companion control processor board for the same rack
A revised hardware variant, SPU232.2-5 (029.366.818), offers an improved CAN interface while maintaining backward compatibility. For systems still operating with the earlier SPU232.1, the SPU232.2 provides enhanced processing capability, though partial firmware incompatibilities may require verification before substitution.
Service and Maintenance Considerations
As an OEM-discontinued legacy product, the SPU232.2 is available through the secondary spare parts market rather than as a current production item. Key considerations for maintenance planning:
Firmware Compatibility: The module operates with the firmware resident on the Alspa 6000 system. Replacement units should be verified for firmware version compatibility with the existing rack configuration prior to installation.
Diagnostics: On-board LED indicators provide fault and status reporting; the module supports system-level alarm reporting to the operator station.
Environmental Specifications: Operating temperature range of 0°C to +60°C, suitable for cabinet-mounted installation in power plant control rooms.
For sites requiring the revised hardware version, the SPU232.2-5 (029.366.818) should be referenced. For technical support and spare parts verification, consult GE Vernova’s legacy Alspa support channels or authorized industrial automation spare parts suppliers.
