Description
ALSTOM DEP232.1 029.223003
Product Overview
The ALSTOM DEP232.1 029.223003 is a digital electronic input module belonging to the legacy ALSTOM 232-series controller architecture. Current procurement references identify the exact 029.223003 part number as DEP 232 / DEP 232.1, with its function listed as a digital electronic input module for a controller. The same parts reference distinguishes it from the DAP232 output module, ADU232 analog-input hardware, DAU232 analog-output hardware, and DIZ232 counting-input module.
In an installed control system, the ALSTOM DEP232.1 029.223003 provides the input-side interface between discrete field signals and the controller. Typical applications for a digital input assembly include equipment status, switch positions, permissive signals, alarm contacts, interlock states, and other binary process information. The exact field-signal convention, channel capacity, electrical thresholds, isolation arrangement, and termination hardware should be confirmed against the original ALSTOM system documentation before engineering a replacement. Public references identify the function clearly, but they do not provide sufficient authoritative detail to safely publish a complete channel-by-channel electrical specification.
That distinction is important for legacy procurement. A modern PLC digital-input card with a similar nominal voltage is not automatically an acceptable substitute. The DEP232.1 operates within an older controller architecture, so its backplane interface, field termination, signal conditioning, diagnostics, and application configuration all form part of the compatibility equation. Current references also place DEP232.1 029.223003 alongside other ALSTOM 232-series components, including DAP232 590.043150, DIZ232.1 029.223004, ADU232.1 029.223006, and DAU232.1 029.223005.
Product Introduction
When a legacy controller begins reporting unreliable discrete states, the problem may originate in the field wiring, termination assembly, input card, or controller interface. The DEP232.1 029.223003 is specifically identified as the digital-input assembly in this architecture, making exact part-number matching important during troubleshooting and replacement.
For a DCS or turbine-control maintenance project, verify the complete .1 / 029.223003 identification before considering another 232-series input board. Similar numbering does not mean equivalent electrical behavior.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | .1 |
| Part Number | 029.223003 |
| Manufacturer / Brand | ALSTOM |
| Product Type | Digital electronic input module |
| Signal Direction | Digital field input to controller |
| Product Family | ALSTOM 232-series controller hardware |
| Primary Function | Discrete signal acquisition |
| Channel Count | Not reliably verified for exact 029.223003 |
| Input Voltage | Not reliably verified for exact 029.223003 |
| Input Current | Not reliably verified |
| Input Threshold | Not reliably verified |
| Isolation | Not reliably verified for exact variant |
| Communication | Controller backplane/interface; exact implementation not publicly verified |
| Field Termination | System-dependent; verify installed termination hardware |
| Firmware | Not established from part number alone |
| Installation | Controller/rack-mounted electronic module |
| Application | Industrial automation and power-control systems |
| Operating Temperature | Not reliably verified |
| Protection Rating | Not reliably verified |
The identification as a digital electronic input module and the association with the ALSTOM controller architecture are supported by current procurement references.
One commercial listing describes the .1 as supporting dry and wet contacts and gives generic 24 VDC, temperature, isolation, and DIN-rail claims. Those specifications are not sufficiently corroborated for the exact 029.223003 assembly and should not be treated as engineering-grade specifications without the original documentation.
DEP232.1 029.223003
Major Features and Practical Advantages
Dedicated digital input function
The .1 is specifically identified as the digital input member of the ALSTOM 232-series I/O architecture. Its job is to acquire discrete field conditions rather than generate output commands or perform analog conversion.
That makes the board relevant to status and interlock signals such as motor running feedback, valve position, breaker state, permissive contacts, alarms, and equipment-ready indications, depending on the application.
232-series controller integration
The part is not simply a generic digital-input module. It is listed alongside the associated controller electronics and other 232-series I/O assemblies. The same reference identifies the DAP232 as the digital-output module and DIZ232.1 as the counting-input module.
This family relationship is useful when tracing an older cabinet because the module’s actual function can often be established from the system’s board-level architecture even when complete manuals are difficult to obtain.
Suitable for legacy maintenance
For an operating installation built around the ALSTOM 232 architecture, an exact .1 spare can preserve existing field wiring and application allocation. That is often preferable to introducing a new generic I/O platform solely to replace one failed board.
There is a practical limitation, though: channel count and electrical thresholds should not be guessed. If the original drawings are unavailable, the physical card markings and termination arrangement should be checked before procurement.
Clear distinction from related 232-series modules
The 232-series contains several different signal-processing boards:
- — digital input
- DAP232 — digital output
- ADU232.1 — analog input
- DAU232.1 — analog output
- DIZ232.1 — counting input
- SSI232.1 — absolute-position / SSI input
These distinctions are reflected in current component references.
Using the wrong board because the model numbers appear similar is an avoidable commissioning problem.
Legacy documentation requires verification
A notable procurement issue is that some commercial pages incorrectly identify the manufacturer or attach generic specifications to the part. One current listing calls the module an Emerson product even though other references place .1 029.223003 directly within the ALSTOM 232-series hardware list.
For that reason, the ALSTOM nameplate, complete part number, PCB revision, and installed controller architecture should take precedence over generic online catalog descriptions.
Related Products
- ALSTOM DAP232 590.043150 — Digital output module in the same 232-series architecture. It performs the opposite signal direction and should not be substituted for the .1.
- ALSTOM ADU232.1-1 029.223006 — Analog electronic input module for the controller. It handles analog rather than discrete signals.
- ALSTOM DAU232.1 029.223005 — Analog electronic output module; used for analog command signals rather than digital status acquisition.
- ALSTOM DIZ232.1-1 029.223004 — 24 V counting input module. Its pulse/counting function differentiates it from the standard digital input role of .1.
- ALSTOM DIZ232.1 — 5 V counting-input variant listed separately from the 24 V DIZ configuration.
- ALSTOM SSI232.1 590.042009 — SSI absolute-input module for controller applications; functionally different from conventional discrete inputs.
- ALSTOM CAN 232.2 029.356519 — CANbus communication module used within the controller architecture. It provides communications rather than field digital input acquisition.
- ALSTOM DGM 200-V 029.356081 — CC100-bus communication module associated with the controller architecture.
- ALSTOM KPE232.K 029.233502 — RTDB/electronic communication module listed within the same controller hardware ecosystem.
FAQ
What is ALSTOM .1 029.223003?
It is a digital electronic input module for the ALSTOM 232-series controller architecture. The exact part number is 029.223003.
Is .1 an input or output module?
It is an input module. The corresponding DAP232 590.043150 is identified as the digital output module, while .1 handles digital input signals.
How many digital inputs does .1 have?
The exact channel count is not sufficiently verified from reliable public documentation for part number 029.223003. I would not publish a specific channel count based only on generic commercial listings.
Does .1 operate at 24 VDC?
Some commercial references claim 24 VDC operation, but that specification is not adequately corroborated for the exact 029.223003 hardware. Confirm the input voltage and threshold from the original ALSTOM drawings, module label, or installed system documentation before connecting field wiring.
Can I replace .1 with another ALSTOM 232-series input card?
Not automatically. , for example, is a counting-input module and is listed separately from .1. ADU232.1 is an analog-input module. Similar 232-series nomenclature does not establish electrical or application compatibility.
Can I hot-swap the .1?
Do not assume hot-swap capability. Public documentation available for the exact module does not establish a universal live-removal procedure. Treat it as an active controller I/O assembly and follow the site’s approved maintenance procedure before removal.
Does .1 require firmware?
No firmware version can be reliably established from 029.223003 alone. The module should be considered hardware within a larger controller architecture. If the installed system uses board-specific firmware or configuration data, verify the revision before replacement.
Will replacing the .1 restore the existing I/O configuration?
Not necessarily. A hardware replacement does not by itself guarantee that the controller configuration, channel mapping, scaling, alarm logic, or application parameters will be restored. Back up the applicable controller configuration and verify every affected input during commissioning.
Procurement Note
ALSTOM .1 029.223003 should be specified by its complete part number and system context. Current references consistently identify 029.223003 as the .1 digital electronic input module, but detailed electrical specifications are not sufficiently documented publicly to justify filling in missing values with generic 24 VDC I/O assumptions.
For legacy ALSTOM 232-series equipment, verify the actual board marking, rack position, termination hardware, and field-signal characteristics before accepting a substitute. The related 590.043150, .1 029.223004, ADU232.1 029.223006, and DAU232.1 029.223005 are different functional assemblies despite their closely related numbering.
