Description
Product Overview
ADA232 (Part No:029.202426 / 029.202 426) is a high-precision combined analog-to-digital and digital-to-analog converter module developed by Alstom for power plant turbine and generator control systems. It is a VME form factor plug-in PCB board, responsible for converting analog field measurement signals into digital data for the controller, while converting digital control commands back to analog output signals to drive field actuators, transducers and regulators. Widely deployed in Alstom PACS turbine/generator control racks. This series has been discontinued by original manufacturer and is mainly supplied as legacy spare parts.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | Alstom |
| Part Number | ADA232, 029.202426 |
| Product Type | 8AI +8AO Combined A/D D/A Converter Board |
| Analog Input Channels | 8 channels, ±10V |
| Analog Output Channels | 8 channels, ±10V |
| Conversion Type | Simultaneous sample A/D, high resolution D/A |
| Backplane Interface | VME bus for communication with rack CPU |
| Power Supply | Rack backplane powered |
| Mounting | VME slot plug-in module |
| Operating Temperature | -20 °C ~ +60 °C |
| Humidity | 5%–95% RH, non-condensing |
| Net Weight | Approx. 1.2 kg |
| System Compatibility | Alstom PACS Turbine Control System |
Key Features
- Dual A/D + D/A Integration: Combines 8 analog input and 8 analog output channels on a single board, both supporting ±10V signal range, reduces rack slot consumption.
- High Precision Signal Conversion: Optimized for power control closed-loop regulation, ensures accurate conversion for generator excitation, valve position and shaft measurement signals.
- VME Bus Communication: Transfers sampled analog values and receives digital setpoint commands via VME backplane to the main processor card.
- Built-in Channel Diagnostics: Detects open circuit, short circuit and signal overrange faults on each channel, reports fault status to the system controller.
- Signal Isolation & Noise Suppression: Onboard galvanic isolation between field analog wiring and VME digital bus to filter EMI interference in power plant cabinet environments.
- VME Standard Form Factor: Fits standard Alstom PACS rack slots for turbine/generator control cabinets.
Applications
- Thermal power plant steam/gas turbine PACS control system
- Generator excitation control analog signal acquisition and output
- Valve position control and transducer signal interface
- Hydroelectric turbine governor control rack
- Captive power plant rotating machinery control and monitoring
Installation & Maintenance Notes
- ESD anti-static protection must be used when handling the PCB board.
- Power down the entire control rack and apply lockout/tagout before removing or inserting the module.
- Separate analog field signal cables from high-current power wiring to minimize electromagnetic interference.
- Perform channel calibration and loop signal test after board replacement during unit outage.
- Inspect connectors and solder joints for thermal aging during overhaul.
- Verify firmware and configuration compatibility before installing spare ADA232 board.
FAQ
Q: What does ADA232 stand for? A: ADA = Analog Digital Analog, meaning it integrates both A/D input and D/A output conversion functions.
Q: Is ADA232 still in active production? A: Alstom has discontinued ADA232 series; available stock is new surplus or refurbished legacy spare parts for existing PACS turbine control systems.
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