Description
At-A-Glance Executive Brief
- Model: AL129A, alternate reference CD101152
- Brand: Alstom
- Part Type: Chopper converter power supply module
- Lifecycle status: OEM obsolescent, stocked for power generation brownfield sites
- System compatibility: Alstom CE2000 and CE3000 control racks
- Weight: 0.48 kg
Technical Introduction
Field sites lose full rack operation when this supply fails, taking down turbine and boiler control logic. This plug-in rack module accepts wide-range AC mains and converts it to two isolated DC rails for the backplane. It delivers regulated 5 VDC and 12 VDC to CPUs and I/O cards inside AM163, AM164 and AM166 chassis. Internal overvoltage, overcurrent and short-circuit protection shut down outputs during fault events to prevent collateral damage to adjacent board sets. Many power stations hold spare units to avoid extended downtime during legacy system migration.
- Best Suited For
- Gas and steam turbine CE2000 control cabinets
- HVDC substation automation racks
- Direct drop-in power supply replacement without backplane modification
Core Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | AL129A (CD101152 reference) |
| Input Voltage | 96–253 VAC |
| Output 1 | 5 VDC @ 10 A, isolated |
| Output 2 | 12 VDC @ 4 A, isolated |
| Rated Power | 120 W |
| Mounting | Plug-in for Alstom CE2000 / CE3000 backplane |
| Protection | Overvoltage, overcurrent, short-circuit |
| Operating Range | -20°C to +70°C cabinet ambient |
| Weight | 0.48 kg |
Field Engineer’s Tech Notes
- Check backplane load calculation before swapping. If total rack draw exceeds the module’s combined DC rating, repeated overcurrent trips will occur even with a new AL129A installed.
- Capacitor aging is the primary failure mode on used units. Storage in high-humidity cabinets accelerates electrolyte degradation and can cause inrush failures on power-up.
Adaptive QA & Testing Protocol
Each unit is bench tested in a matching Alstom CE2000 backplane fixture. We apply full AC input range and load both 5 VDC and 12 VDC outputs to rated current while recording voltage regulation. Overcurrent and short-circuit protection triggers are verified. We inspect internal capacitors for swelling and measure ripple across both DC outputs. Full test reports or bench test video clips are available upon request.
Buyer’s FAQ
Q: Is AL129A compatible with CE3000 racks? A: Yes, it fits both CE2000 and CE3000 controller racks, with identical backplane pin mapping. Confirm your rack’s total DC load before installation.
Q: What warranty applies for refurbished AL129A units? A: Refurbished modules carry a 12-month hardware warranty. NSFP units also ship with 12-month coverage; warranty excludes onsite labor and damage from improper rack loading.
Q: What lead time can I expect? A: Stocked units ship in 3–7 business days. If inventory is exhausted, lead time extends while we source available surplus or refurbished stock.
Q: Does CD101152 represent a different hardware revision? A: CD101152 is the drawing reference number, the physical hardware is AL129A. It is fully drop-in interchangeable for units marked AL129A.
What is the function of the AL129A power supply module?
Can the AL129A be used in other industrial automation systems?
Do you have any compatible power supply modules for the AL129A?
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