Description
Product Introduction
When a legacy control rack experiences unstable internal power or a failed supply module, replacing the correct power conversion unit can help restore operation without requiring a broader system retrofit. The ALSTOM AL129A CD101152 is identified in product references as a rack-mounted chopper converter for ALSPA CE2000/CE3000 control systems. Its reported function is to convert AC input power into isolated DC rails used by controller and peripheral electronics.
The ALSTOM AL129A CD101152 is intended for maintenance of compatible legacy control racks. Before installation, verify the rack and backplane arrangement, input supply range, output requirements, and physical revision against the existing unit. Because this is a legacy component and a complete original datasheet was not confirmed in the available references, treat unverified electrical ratings as preliminary until checked against the equipment documentation.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | AL129A |
| Part Number | CD101152 |
| Brand | ALSTOM |
| Product Type | AC-to-DC power conversion module |
| System | ALSPA CE2000/CE3000 |
| Converter Type | Chopper converter |
| Reported AC Input Range | 96–253 V AC |
| Reported DC Outputs | Isolated 5 V DC and 12 V DC |
| Reported Maximum 5 V Output Current | 10 A |
| Reported Maximum 12 V Output Current | 4 A |
| Reported Power Rating | Approximately 120 W |
| Reported Switching Frequency | Approximately 60 kHz |
| Rack Compatibility | AM163, AM164, and AM166 are cited in secondary references; verify exact configuration |
| Backplane Association | FB178, as reported by secondary references |
| Communication Protocol | Not applicable to the power module itself |
| Operating Temperature | −20°C to +60°C reported; confirm against the original documentation |
| Protection Functions | Overcurrent, overvoltage, and overtemperature protection reported; verify by revision |
| Protection Rating | No independently verified IP rating |
| Installation | Rack-mounted, plug-in module |
Specification note: The voltage, current, power, and temperature values above are secondary-source figures, not confirmed manufacturer limits. Do not use them as a substitute for the original ALSTOM documentation when checking electrical compatibility.
AL129A CD101152
Application Scenarios and Pain Points
- Legacy control-rack maintenance: Supports repair planning for compatible ALSPA CE2000/CE3000 installations where the existing power conversion hardware remains in service.
- Power-supply fault replacement: Relevant when troubleshooting missing DC rails, supply instability, or a failed rack power module. Confirm the fault is in the converter rather than the backplane or downstream load.
- Power plant control systems: May be used in installed control equipment associated with power generation, subject to the specific rack configuration.
- Spare-parts planning: Helps maintenance teams identify a replacement for an existing AL129A assembly while preserving the original rack architecture.
Field note: A power module can fail repeatedly when a downstream board has a short circuit or excessive load. Before fitting a replacement, check the rack connections and investigate the original failure rather than treating the converter as the only possible cause.
Related Products
The following models are associated with the same reported control-rack environment. They have different functions and should not be treated as direct substitutes for AL129A.
| Model | Function or role | Relationship |
|---|---|---|
| AL129B | Related AL129-series power module, as reported in secondary listings | Verify revision and electrical equivalence before substitution. |
| AM163 | Rack assembly | Mechanical and backplane compatibility reference. |
| AM164 | Rack assembly | Verify rack configuration and module position. |
| AM166 | Expansion rack | Relevant when checking the installed rack architecture. |
| FB178 | Backplane | Confirm connector and power-distribution arrangement. |
| LE108A-3 | Logic input module, as listed in secondary references | A downstream control-system module, not a power-supply replacement. |
Engineer’s Guide: Three Checks Before Replacement
- Match the identification label. Confirm both
AL129AandCD101152, along with any revision or assembly markings. Do not assume that a similarly named variant has identical outputs. - Verify electrical requirements. Compare the installed rack’s AC input, required DC rails, output current demand, and protection arrangement with the applicable documentation.
- Inspect the complete power path. Check the backplane connector, downstream modules, and supply wiring. After replacement, verify the output rails and rack operation using approved site procedures.
Frequently Asked Questions
Q1: What is the ALSTOM CD101152?
It is identified in secondary product references as a rack-mounted power conversion module for compatible ALSPA CE2000/CE3000 control systems.
Q2: Is CD101152 the same as ?
is commonly associated with the model in product and spare-parts references. Confirm both identifiers on the installed unit before ordering.
Q3: What output voltages does it provide?
Secondary references report isolated 5 V DC and 12 V DC outputs. Verify the required output ratings against the original documentation for your installation.
Q4: Which racks can accept this module?
AM163, AM164, and AM166 racks are cited in secondary references. Physical fit alone does not establish electrical compatibility; confirm the backplane and rack variant.
Q5: Does support industrial communication protocols?
It is a power conversion module, not a standalone communication controller. It should not be specified as a Modbus, Ethernet, or IEC protocol interface without separate documentation.
Q6: What should be confirmed when purchasing a replacement?
Check the model and part number, revision, connector condition, stated new or refurbished condition, and availability of functional test records. Request evidence that the unit was tested for the required input and output conditions.
Q7: Can a used unit be installed directly?
Not without inspection and verification. Check for physical damage, corrosion, connector wear, and evidence of overheating. Validate output rails and downstream operation before returning the rack to service.
