Alstom ADA232 029.202426 Analog Input Output Module

Description

Alstom / Cegelec ADA232 029.202426 Analog I/O Module

Product Introduction

Alstom ADA232 029.202426 is a legacy analog input/output module used within older Alstom/Cegelec industrial control architectures. Available part records consistently associate 029.202426 with the designation ADA232 and classify it as an analog input/output module. Other equipment records place the module alongside SPU232.2 processors, DPU-S subracks, and other 232-series control hardware, indicating that it belongs to a dedicated control-system architecture rather than being a general-purpose PLC analog card.

The functional purpose of ADA232 029.202426 is to provide the analog signal interface between field instrumentation and the associated controller. Depending on the original system configuration, such a module can be part of the signal acquisition and command-output path for process variables, equipment measurements, and control signals. The available public records, however, do not provide sufficient primary documentation to establish the exact number of input and output channels, individual signal ranges, electrical isolation, conversion resolution, or calibration accuracy. Those values should therefore not be copied from unrelated ADA or 232-series modules.

ADA232 029.202426 should be treated as a system-specific legacy spare. Its electrical and mechanical compatibility depends on the host rack, backplane, controller generation, and associated I/O configuration. A current replacement project should preserve the complete part number and verify the original board markings before installation. Records also identify the 029.202426 item under both Alstom and Cegelec-related descriptions, which is consistent with the historical evolution of this equipment family.

Technical Specifications

The identification of the module as / 029.202426 analog input/output hardware is supported by multiple independent part records. Detailed electrical specifications remain intentionally unassigned where the available sources do not provide reliable evidence.

ADA232 029.202426

Main Features and Engineering Considerations

Legacy Analog I/O Architecture

The should not be treated like a modern universal analog I/O module. Its association with SPU232 and DPU-S hardware indicates that the module was designed around a particular controller and rack architecture. The host system determines much of the practical compatibility.

A replacement board therefore needs to match the original rack and backplane rather than simply matching the physical connector.

Analog Signal Interface

The module is consistently identified as an analog input/output device. That establishes its broad function, but the available sources do not reliably establish whether a particular channel supports 4–20 mA, 0–10 V, ±10 V, or another signal range.

This is an important distinction for procurement. Do not assume a standard 4–20 mA configuration without checking the original system drawings or module documentation.

System Compatibility

Records for the same Alstom control architecture identify the SPU232.2 processor, DPU-S subrack, and related 232-series boards. One published equipment listing specifically describes 029.202426 as “Analog in-/outputs ADA 232” and associates the SPU232.2 processor with part number 029.366817.

That relationship is useful when tracing an installed system, but it should not be interpreted as proof that every SPU232/DPU-S configuration accepts every revision.

Alstom / Cegelec Historical Identification

The exact part record identifies the manufacturer as Cegelec, while other equipment records identify the same 029.202426 number as Alstom hardware.

For purchasing and maintenance records, retaining both names can make historical cross-referencing easier:

Alstom / Cegelec — — 029.202426

Condition Testing

For a legacy analog board, visual inspection alone is not enough. A used board can appear clean while having degraded analog conversion, damaged input protection, intermittent connectors, or aging components.

For a critical replacement, bench testing against known analog inputs and outputs is preferable before installation.

Application Scenarios

• Legacy Alstom control systems
• Cegelec industrial control systems
• SPU 232 controller installations
• DPU-S rack systems
• Analog process measurement
• Analog control-signal output
• Turbine and rotating-equipment control systems
• Power-generation auxiliary systems
• Industrial process control
• Legacy control-system maintenance and refurbishment

Engineer’s Guide: Field Pitfalls

1. Do not assume the signal range.
The available records identify as an analog I/O module but do not reliably establish the exact electrical range for every channel.

2. Verify the complete part number.
Use 029.202426, not simply “.” Legacy boards can have visually similar variants.

3. Photograph the original board.
Capture the front label, PCB markings, revision, connectors, jumpers, and any handwritten configuration information.

4. Verify the host rack.
Confirm the DPU-S or other associated rack/backplane before installation.

5. Check the controller relationship.
The module appears in records alongside SPU232-series processor hardware. Verify the actual controller and firmware/configuration used in the plant.

6. Do not assume modern PLC compatibility.
is system-specific legacy hardware. A physical connector match does not establish electrical or software compatibility.

7. Test analog channels before commissioning.
Use calibrated signal sources and verify both acquisition and output behavior against the plant’s original I/O drawings.

8. Check spare-board condition carefully.
For refurbished equipment, inspect connectors, electrolytic capacitors, solder joints, board contamination, and signs of previous repair.

Frequently Asked Questions

What is 029.202426?

It is an Alstom/Cegelec analog input/output module, part number 029.202426, associated with legacy 232-series industrial control hardware.

Is a processor?

No. Available records identify the as an analog input/output module. The related .2 processor is a separate component.

Is 029.202426 an Alstom or Cegelec part?

Both names appear in historical records. The exact part listing identifies Cegelec, while other equipment records identify 029.202426 as Alstom hardware.

How many analog channels does it have?

I would not publish a channel count without the original technical documentation. The available sources establish its analog I/O function but do not provide sufficiently reliable channel-level specifications.

Is it a 4–20 mA module?

That cannot be confirmed from the available evidence. The exact input/output signal ranges should be verified from the original system drawings or the board documentation.

Does use Ethernet or Modbus?

No independent Ethernet or Modbus interface has been established for this board. It is primarily a rack-mounted analog I/O component within its host control architecture.

Can it be replaced by a modern PLC analog card?

Not as a direct assumption. The rack interface, electrical characteristics, controller configuration, and software mapping all need to be considered.

Procurement Note

For procurement, specify the component as:

Alstom / Cegelec — P/N 029.202426 — Analog Input/Output Module

Do not substitute another -looking board without confirming the 029.202426 number and board revision. Before purchasing a replacement, request photographs of the original nameplate and PCB, together with the host rack/controller identification.

Because reliable public documentation for the exact electrical specification is limited, I would not state a channel count, 4–20 mA range, supply voltage, accuracy, or temperature rating as confirmed specifications without an original Alstom/Cegelec manual or plant drawing. That is preferable to transferring specifications from another 232-series board and creating a compatibility problem in the field.