Description
Alstom DIZ232.1 029.223 004 Counter Module
Product Introduction
In older Alstom control equipment, counting signals need a dedicated interface rather than a generic digital input card. The Alstom DIZ232.1 029.223 004 is identified as a counting electronic input module for the 232 control architecture, with eight input channels intended for digital pulse/counting applications.
Available references describe the input side as voltage-based, with 12–30 VDC reported for the module and separate system records identifying the DIZ232.1 as a 24 V counting input module. Because detailed electrical thresholds and timing characteristics are not well documented in authoritative public material, those values should be checked against the original equipment drawings before field wiring is changed.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Alstom |
| Product Model | DIZ232.1 |
| Exact Part Number | 029.223 004 |
| Product Type | Counter / counting input module |
| Core Function | Digital pulse counting and signal acquisition |
| Number of Inputs | 8 |
| Input Type | Voltage input |
| Input Voltage Range | 12–30 VDC, according to available secondary references |
| Nominal Application | 24 VDC counting signals |
| System Family | Alstom 232 control platform |
| Communication Protocol | Not independently verified |
| Counting Architecture | Digital pulse counting |
| Operating Temperature | Not sufficiently verified |
| Mounting Method | Verify against the host Alstom rack/system |
| Protection Rating | Not sufficiently verified |
| Revision | Rev. 04 reported for one exact-part unit; verify actual board |
| Condition | Verify actual inventory condition |
The 8-input and 12–30 VDC descriptions recur in available product references. A separate industrial procurement record specifically identifies DIZ 232.1-1 / E0164.001.02 / 029.223004 as a 24 V counting electronic input module, providing useful corroboration of its intended function.
Major Features / Advantages
Dedicated Counting Input Function
The DIZ232.1 is not simply another general-purpose digital input board. Its published classification is a counter module, and procurement records describe it as a counting electronic input module. That makes it relevant where the control system needs to acquire repetitive digital pulses rather than merely determine whether a contact is open or closed.
DIZ232.1 029.223 004
Eight Input Channels
The available technical listings specify 8 input channels. This gives the module a compact interface for multiple pulse-producing field devices within the same control architecture. Exact channel wiring, commoning, and signal conditioning should still be verified from the original Alstom drawings rather than inferred from the channel count alone.
24 VDC Industrial Signal Context
The DIZ232.1 is repeatedly associated with 24 V counting applications. One industrial procurement record explicitly describes DIZ 232.1 029.223004 as a “24V Counting electronic input module,” while product listings give a broader 12–30 VDC input range. These references point to the same general field-signal class, but they do not establish every electrical threshold or maximum counting frequency.
Part-Number Traceability
For a legacy Alstom installation, the complete 029.223 004 number is more useful than the .1 family designation by itself. Other 232-series modules have similar naming conventions but very different functions—for example, DAP232 is listed as a processor/output-related module, DEP232 as a digital input module, and DAU232 as an analog output conversion module.
Suitable for Legacy System Maintenance
The .1 is relevant when an installed Alstom 232 control system must remain in service and an existing counting-input card needs to be replaced. For this type of equipment, exact hardware identification, connector condition, revision matching, and verification of the field wiring are usually more important than generic catalog descriptions.
Application Scenarios & Pain Points
- Pulse counting: Acquisition of repetitive voltage pulses generated by equipment within an industrial control system.
- Speed or rotation-related monitoring: Applicable where a field device generates discrete pulses that must be counted by the controller. The exact sensor and frequency limits must be confirmed from the system documentation.
- Legacy converter/control cabinets: Replacement of a failed .1 while retaining the existing Alstom 232 architecture.
- Scheduled maintenance: Holding a correctly identified spare before a shutdown can reduce troubleshooting time when a counting-input channel fails.
The practical trap is treating the .1 as a conventional 24 V digital input card. Its identification as a counter module means the signal timing and counting behavior matter. Do not assume that a generic replacement digital-input board will reproduce the same function simply because its field voltage is also 24 VDC.
Related Products
- Alstom DEP232 — 590.043152: Digital input module in the same broader 232 platform; functionally different from the .1 counting input.
- Alstom DAP232 — 590.043150: Unit processor reference in the 232 family; not a substitute for the .1.
- Alstom DAU232 — 590.043151: Digital-to-analog conversion module.
- Alstom ADU232.1 — 029.223 006: Analog input module reference associated with the 232 control platform.
- Alstom BIO232 — 029.209 132: Digital input/output module in the same platform.
- Alstom SRE232.1 — 029.228 675: Drive control module used within the broader 232 architecture; not an I/O substitute.
- Alstom COP232.1 — 029.210 156: Central VME A32/D32 unit reference in the 232 family.
- Alstom VCM232.2 — 029.359 088: VME configuration-manager master module reference.
Engineer’s Guide: Field Pitfalls to Avoid
1. Do not confuse .1 with DEP232
Both are input-related modules in the 232 family, but their functions differ. .1 is identified as a counter module, whereas DEP232 is identified as a digital input module. The complete part number must be checked before substitution.
2. Verify the complete part number
The correct identification is:
.1 — 029.223 004
Do not approve a quotation that only says “” without the complete catalog number.
3. Verify the revision
An exact-part listing identifies 029.223 004 as Rev. 04. That does not prove every physical unit carries Rev. 04. Compare the actual PCB label with the approved equipment documentation before installation.
4. Do not assume the maximum counting frequency
The available sources establish the counting function but do not provide sufficiently reliable documentation for publishing a maximum pulse frequency, minimum pulse width, debounce specification, or input threshold. These parameters can be critical when the .1 is connected to a high-speed pulse source.
5. Check the field signal before energizing
Although 24 VDC counting use is documented, the broader published input range is reported as 12–30 VDC. Confirm the actual sensor output, polarity, common reference, wiring arrangement, and signal conditioning against the original drawings.
6. Inspect the actual replacement
For older automation hardware, inspect connector pins, PCB contamination, corrosion, repaired components, labels, and revision markings. “Available” does not establish whether a particular unit is unused, previously installed, refurbished, or function-tested.
FAQ
What is Alstom .1 029.223 004?
It is an Alstom .1 counter / counting input module, part number 029.223 004, associated with the Alstom 232 control platform. Available references identify eight digital counting inputs.
How many inputs does .1 have?
Available references specify 8 input channels.
Is .1 a normal digital input module?
No. It is specifically identified as a counter module or counting electronic input module. That distinction is important when evaluating a replacement because pulse-processing requirements may differ from ordinary status-input acquisition.
What voltage does the .1 accept?
Available listings report 12–30 VDC, while a separate system procurement record identifies the .1 as a 24 V counting input module. Use the original Alstom documentation to confirm the exact input thresholds and wiring requirements for the installed system.
What is the exact part number?
The exact part number is 029.223 004. When purchasing a replacement, specify both and 029.223 004.
Is .1 029.223 004 interchangeable with DEP232 590.043152?
No interchangeability should be assumed. The two are described as different functional modules within the 232 platform: .1 is a counter module, while DEP232 is a digital input module.
What should procurement verify before buying?
Request photographs of the actual board showing .1 / 029.223 004, the revision marking, connector condition, and any visible modifications. For a used or refurbished unit, request the available functional-test information rather than relying solely on a generic product description.
