Description
ALSTOM DAP232 590.043150
Product Overview
The ALSTOM DAP232 590.043150 is a DAP 232 unit processor associated with the legacy ALSTOM 232-series control architecture. Current part references consistently identify 590.043150 with the DAP 232 designation and describe the unit as providing 32 digital outputs at 24 VDC. A separate parts listing identifies the DAP 232 as an “LP” unit processor and gives the environmental designation E:09.
In practical control-system terms, the ALSTOM DAP232 590.043150 is used to convert commands generated by the control system into discrete field outputs. Those outputs can be involved in relay actuation, contactor commands, solenoid control, alarms, permissive-related signals, or other binary equipment interfaces, depending on the application. It should not be confused with the closely related DEP 232, which is listed as a digital input module, or the DAU 232, which is identified as a digital-to-analog conversion module.
The 232-series architecture contains several specialized boards, so exact hardware identification matters during legacy replacement. Public references also identify DIZ 232.1 as a counting input module and SSI 232 as another interface board. The DAP232 therefore occupies a specific output-side position rather than functioning as a generic modern PLC output card.
For procurement, the complete designation DAP232 / 590.043150 should be matched. Some commercial pages call the product a “unit processor,” while others emphasize its 32 digital outputs. Both descriptions appear in current references, and the safest engineering interpretation is that this is a processor/output assembly whose field-side role is 32-channel digital output control.
Product Introduction
A failed output assembly in an older ALSTOM control cabinet can interrupt far more than one PLC point. The DAP232 590.043150 is identified as a 32-channel, 24 VDC digital-output unit, making exact hardware matching important when existing field wiring and control logic must remain in service.
For a legacy replacement, the key checks are the 590.043150 part number, board revision, rack position, field termination, load type, and installed application. A visually similar 232-series board is not automatically interchangeable.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | |
| Part Number | 590.043150 |
| Manufacturer / Brand | ALSTOM |
| Product Type | Unit processor / digital output module |
| Output Type | Digital / discrete |
| Number of Outputs | 32 |
| Output Voltage | 24 VDC |
| Processor Variant | LP, as reported in parts documentation |
| Environmental Code | E:09 |
| Application | Industrial automation / control system |
| System Family | ALSTOM 232-series hardware |
| Communication Interface | System/backplane dependent; exact interface not reliably documented publicly |
| Output Current per Channel | Not reliably verified for exact 590.043150 |
| Output Isolation | Not reliably verified for exact variant |
| Short-Circuit Protection | Not reliably verified for exact variant |
| Operating Temperature | Not reliably verified from authoritative documentation |
| Installation | System/rack-mounted |
| Firmware | Exact version not established from the part number alone |
The 32 digital outputs and 24 VDC output level are supported by multiple current references.
I have deliberately omitted output current, switching technology, isolation voltage, protocol, and firmware because the available sources do not provide sufficiently reliable exact-variant documentation for those parameters. That is important when specifying a replacement for a live control system.
DAP232-590.043150
Major Features and Practical Advantages
32-channel digital output architecture
The provides a reported 32 digital output channels, allowing one assembly to control a substantial number of discrete field functions. In an established cabinet, maintaining the original channel density can simplify replacement work because existing I/O allocation does not have to be redistributed.
24 VDC field output
The reported 24 VDC output architecture makes the module suitable for discrete control circuits built around the corresponding DC field voltage. The actual load type still needs to be checked. A solenoid, interposing relay, contactor, or electronic input can impose very different electrical requirements even when all are nominally 24 VDC.
Dedicated output-side function
The ALSTOM 232-series hardware uses different assemblies for different signal functions. Current parts references identify as the digital-output unit, DEP232 as the digital-input module, and DAU232 as the analog-output conversion module.
That separation is useful during troubleshooting: a fault should not be treated as a generic controller failure without checking the actual output assembly and associated field wiring.
LP processor designation
The available procurement documentation describes the as an LP unit processor. This indicates that the assembly has a processor/control role in addition to its field-output function. However, the exact processor architecture and memory specification are not sufficiently documented for this particular part number, so those details should be verified from the physical board or original ALSTOM documentation.
Useful legacy replacement component
For plants retaining older ALSTOM control hardware, maintaining an exact spare can be considerably simpler than redesigning the output architecture. That benefit depends on having the correct hardware revision and matching field interface.
The practical issue is not simply “32 outputs at 24 VDC.” Output behavior, load limits, commoning, diagnostics, and backplane communication must all agree with the installed system.
Related Products
- ALSTOM DEP232 590.043152 — Digital input module in the same 232-series family. It handles the opposite signal direction from the .
- ALSTOM DAU232 590.043151 — Digital-to-analog conversion module used for analog output functions. It is not a direct substitute for the .
- ALSTOM DIZ232.1 029.223004 — Counting input module designed for pulse/counting applications; functionally different from the .
- ALSTOM SSI232 590.042009 — Signal/interface board within the broader ALSTOM 232 hardware family.
- ALSTOM BIO232 029.209132 — Digital input/output module identified in current ALSTOM parts catalogs; exact I/O configuration must be checked before considering substitution.
- ALSTOM VCM232.2 029.359088 — VME configuration-manager/master module; a system-management component rather than a field-output module.
- ALSTOM SPU232.1-CAN 029.354630 — SPU232 processor/control board with CAN designation; related to the broader 232-series architecture but not a direct replacement.
- — Same product family designation; always match the complete 590.043150 part number when sourcing the exact assembly.
FAQ
What is ALSTOM 590.043150?
The 590.043150 is an ALSTOM 232-series unit processor / digital output assembly. Current references identify it as a 32-channel digital output module with 24 VDC outputs.
How many outputs does have?
The documented configuration is 32 digital output channels. The reported output voltage is 24 VDC.
Is an input or output module?
It is identified as an output-side module. The related DEP232 590.043152 is listed as the digital input module, while DAU232 590.043151 is listed as an analog-output conversion module.
Can I replace with another 24 VDC, 32-channel digital output card?
Not without engineering verification. Matching channel count and voltage is only the first step. The replacement must also match the ALSTOM backplane, output electrical characteristics, termination arrangement, diagnostics, field load requirements, and application configuration.
Can I hot-swap the ?
Do not assume hot-swap capability. Public documentation available for the exact 590.043150 does not establish a universal live-replacement procedure. Treat the module as part of the active control system and follow the installed ALSTOM maintenance procedure before removing it.
Does contain the control logic?
The is described as a unit processor, so it should not be treated as a purely passive terminal card. However, the exact application-memory architecture for 590.043150 is not sufficiently documented publicly. Do not assume that replacing the hardware automatically restores the application.
Does support a specific firmware version?
No exact firmware version can be reliably established from 590.043150 alone. For a legacy control system, verify the hardware revision, firmware/application revision, and system configuration separately.
What should I verify before purchasing 590.043150?
For a maintenance replacement, verify:
- 590.043150
- Board revision and assembly markings
- Existing rack and slot
- Field termination assembly
- 24 VDC field-load arrangement
- Output commoning and wiring
- Application/controller association
- Firmware or software revision where applicable
- Physical/test condition of the replacement
A clear photograph of the module’s nameplate and PCB markings is valuable when distinguishing revisions from other 232-series boards.
Procurement Note
ALSTOM 590.043150 should be sourced as an exact legacy assembly, not as a generic 24 VDC digital-output replacement. Current references agree on the basic identity—, 590.043150, 32 digital outputs, 24 VDC—but detailed electrical limits are not consistently published.
For a plant maintenance purchase, verify the complete part number and board revision against the installed hardware before accepting a substitute. The closely related DEP232, DAU232, DIZ232, and SPU232 boards belong to the same broader ecosystem but perform materially different functions.
