Description
Product Overview
The ABB CMA126 3DDE300406 is an interface card associated with ABB’s legacy SYNPOL D control equipment. Identified in component catalogs as a printed circuit board, it is a system-specific spare intended for installations that use the corresponding ABB hardware. Its precise role should be established from the original cabinet documentation and board markings rather than inferred from generic descriptions of PLC communication modules.
For maintenance engineers, the key consideration is matching the installed assembly. Interface boards can differ in connector assignments, electrical signal paths, board revisions, and the hardware they connect to. A similar-looking PCB or a card advertised for another ABB platform should not be assumed compatible. Before approving a replacement, compare the full CMA126 / 3DDE300406 designation, revision markings, connector arrangement, and the parts list for the host system.
Because CMA126 is a legacy component and is listed as discontinued by some suppliers, procurement may involve surplus or previously used inventory. Ask for photographs of the actual board, confirmation of the complete part number, and details of the inspection or functional tests performed. A clean PCB does not prove that its electronic components are working, and a supplier’s “new” description does not independently establish factory-sealed condition.
Product Introduction
When a legacy control system develops an interface fault, replacing the correct board can be more practical than redesigning the cabinet around a different platform. The ABB CMA126 3DDE300406 is identified as a SYNPOL D interface card.
Verify the host system, board revision, connector layout, and test status before installation. Do not rely on broad claims of PLC or communication-protocol compatibility without supporting documentation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Model | CMA126 |
| Part number | 3DDE300406 |
| Product type | Interface card / PCB |
| Associated system | SYNPOL D |
| Main function | System-specific interface and board-level interconnection |
| Signal assignments | Not verified; consult the applicable system drawing |
| Communication protocols | Not conclusively verified for this exact board |
| Supply voltage | Not verified |
| Connector configuration | Confirm against the original board |
| Board revision | Check physical label and PCB markings |
| Mounting | PCB installation within the compatible host assembly |
| Operating temperature | Confirm from the applicable ABB documentation |
| Dimensions | Confirm from the original mechanical drawing |
| Lifecycle | Reported discontinued by some suppliers |
| Condition | Confirm new surplus, used, refurbished, and testing status |
Technical caution: Online listings contain inconsistent generic descriptions of CMA126, including unsupported references to Ethernet, RS-485, Modbus, and PROFIBUS. These should not be treated as confirmed specifications for the 3DDE300406 card without a matching ABB manual or system drawing.
CMA126
Related Products
The following identifiers are useful when researching or procuring the same legacy board. They are not confirmed substitutes.
- 3DDE300406 — Part number associated with .
- CMA 126 — Spaced model designation used in some catalogs.
- ABB SYNPOL D control hardware — Host-system family associated with this interface card.
- SYNPOL D interface and control PCBs — Related board-level components that require exact part-number matching.
Frequently Asked Questions
1. What is the ABB used for?
is identified in component catalogs as an ABB SYNPOL D interface card, part number 3DDE300406. Its detailed electrical and signal-interface function should be verified against the documentation for the host system.
2. Is the same as 3DDE300406?
Yes. The catalogs reviewed associate the model designation with ABB part number 3DDE300406. Check the complete markings and revision on the physical board before ordering.
3. Can replace another ABB interface card?
Not based on brand or appearance alone. Verify the exact part number, host-system compatibility, connectors, signal assignments, and board revision. No direct substitute should be assumed without documented cross-reference information.
4. Can the card be replaced while the system is energized?
Do not assume hot swapping is supported. Follow the host system’s isolation procedure and ABB maintenance instructions. Disconnect power and observe the required electrostatic-discharge precautions before handling the PCB.
5. Does require software or configuration?
That depends on its role in the installed SYNPOL D system. Confirm whether configuration resides in the host controller, associated boards, or the replacement assembly. Back up relevant system settings and validate operation after replacement.
6. How can I verify a surplus before purchase?
Request photographs of the actual board, label, connectors, and revision markings. Ask whether it has been visually inspected, electrically tested, or tested in a compatible system. Confirm the warranty and return conditions in writing.
7. What information helps confirm compatibility?
Provide the full / 3DDE300406 label, PCB revision, host-system model, cabinet parts list, and photographs of the connector side. These details are more useful than a general description such as “ABB PLC interface card.”
Procurement recommendation: Treat the ABB as a legacy SYNPOL D interface PCB. Confirm the exact assembly and host-system compatibility before purchase; do not specify unverified communication protocols or electrical ratings in the procurement record.
