Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | LDMTR-01 |
| Part Number | 63940135F |
| Alternate Assembly Reference | 3BHB007445P0001 |
| Manufacturer | ABB |
| Product Family | LD Series |
| Product Type | Measuring Transducer Board |
| Primary Function | Electrical measurement / signal interface |
| Application | ABB legacy drive and power-converter systems |
| Supply Voltage | Not reliably confirmed for this exact revision |
| Input Channels | Not reliably confirmed |
| Output Signal | Not reliably confirmed |
| Isolation | Measurement/control isolation is reported, but exact rating is not confirmed |
| Communication Interface | No reliable evidence of a standalone fieldbus interface |
| Operating Temperature | Not reliably confirmed |
The strongest available references identify LDMTR-01 63940135F as a measuring transducer board or LCDC/drive I/O-related module. One supplier reference also associates it with assembly number 3BHB007445P0001.
There is conflicting secondary information about this part. Some listings call it a generic I/O module, while others describe it as a motor-control or module-registration device. Those descriptions are not sufficiently supported to use as hard specifications.
Product Introduction
The ABB LDMTR-01 63940135F is a legacy measuring transducer board used within ABB LD-series power-electronics and drive-control equipment. Its role is associated with processing electrical measurement information required by the drive control system rather than acting as a conventional PLC digital or analog I/O module. The exact measurement channels depend on the host equipment and board revision.
For maintenance engineers, the critical issue is system matching. Public documentation for this older board is limited, and current reseller descriptions disagree substantially on its function and electrical specifications. I would therefore treat the complete LDMTR-01 / 63940135F / 3BHB007445P0001 identification and the host converter model as mandatory procurement information.
LDMTR-01 63940135F
Application Scenarios & Field Pitfalls
Engineering Pain Point
A failed LDMTR-01 can be mistaken for a general-purpose I/O problem because several current listings describe it simply as an input/output module. That classification is too broad. The board appears in the same legacy ABB ecosystem as LDSTA-01, LDMUI-01, SCYC51204, and SCYC51220, but these boards perform different functions and are not interchangeable.
Typical Applications
- Legacy ABB drive systems — electrical measurement and feedback processing within drive-control electronics.
- Industrial power-converter cabinets — measurement interfaces supporting converter regulation and protection.
- Large motor-control equipment — signal conditioning associated with drive measurement functions.
- Legacy ABB power-electronics maintenance — replacement of failed or degraded measurement boards where the original control architecture must be retained.
Technical Pitfalls to Avoid
- Do not approve it as a generic analog I/O module. Public listings disagree on its exact I/O configuration, and no reliable primary documentation was found confirming specific channel counts or 4–20mA/0–10V characteristics.
- Do not rely on generic 24VDC specifications. One reseller lists 24VDC ±10%, while other sources provide different or unsupported electrical descriptions. This should be verified against the actual cabinet documentation or board marking.
- Verify the host converter before substitution. The LDMTR-01 appears alongside several specialized ABB LD-series control and converter boards; physical similarity does not establish functional compatibility.
- Match revision suffix F. For an obsolete measurement board, the complete 63940135F identifier is more useful than ordering only “.”
Related Products
- LDSTA-01 63940143B — Related ABB LD-series control hardware; different control function and not a direct replacement.
- LDMUI-01 61320946C — Legacy ABB interface module found in the same converter ecosystem; verify application before substitution.
- SCYC51204 63912476C — Transient-absorber hardware associated with legacy ABB converter systems; different protection function.
- SCYC51213 63911607C — Firing unit for ABB cycloconverter control; not a substitute for .
- SCYC51220 63901075C — Pulse-amplifier hardware used in related power-converter systems; different electrical function.
- PPC907BE 3BHE024577R0101 — ABB processor/control hardware used in related converter architectures.
- UFC911B106 3BHE037864R0106 — ABB power-converter control hardware from the broader legacy ecosystem.
- UFC921A101 3BHE024855R0101 — Related ABB converter control board requiring host-system verification.
Procurement Check
For a replacement, specify ABB 63940135F and, where applicable, 3BHB007445P0001. Before purchasing, verify the host ABB converter/drive, PCB revision, connector layout, cabinet position, and the original board’s measurement wiring. Given the conflicting secondary descriptions, I would not approve a substitute based only on claims such as “24VDC I/O,” “4–20mA module,” or “motor control board” without matching the installed system.
