SIMATIC S7-400 | FM 458 EXPANSION
Siemens 6DD1607-0CA1 EXM 438-1 I/O Expansion Module
Siemens 6DD1607-0CA1 is the EXM 438-1 I/O expansion module listed for the SIMATIC S7-400 FM 458 system. The Siemens catalog identifies four 16-bit analog outputs and states that this version is not spare-part-compatible with the earlier EXM 438. That distinction matters when maintaining an installed controller: the complete order number, extension hardware and project documentation should be checked before replacement. Siemens lists this exact order number with the life-cycle wording PM410: Product cancellation, effective 1 October 2022, and identifies it as a spare part. Stockoems offers original new condition, in-stock availability and a one-year warranty as its own commercial terms, with protective packaging and worldwide shipping coordination for confirmed orders.
Confirmed product scope
Condition, availability and warranty above are Stockoems commercial information, not Siemens commitments. Availability is reconfirmed before order processing.
Signal path and use
FM 458 system
The expansion works within the FM 458 control architecture; it is not a stand-alone controller.
EXM 438-1 extension
Use the full order code to distinguish this extension from the earlier EXM 438.
Analog outputs
The current Siemens order record specifies four 16-bit analog outputs.
Typical procurement situations
- Maintenance of an installed FM 458 control station.
- Planned refurbishment of S7-400 motion-control hardware.
- Documented spare-parts review for drive or machinery control projects.
- Comparing module labels and hardware revisions during cabinet service.
Compatibility and revision notice
Siemens explicitly states that EXM 438-1 is not spare-part-compatible with the earlier EXM 438. Review the installed FM 458 assembly, order-number suffix, module cover, wiring and engineering documentation before purchase. Do not substitute by visual similarity alone.
Frequently asked questions
What is Siemens 6DD1607-0CA1?
It is the SIMATIC S7-400 EXM 438-1 I/O expansion module for the FM 458 system.
How many analog outputs are listed?
The Siemens order record specifies four 16-bit analog outputs for this exact part number.
Can EXM 438-1 directly replace EXM 438?
No. Siemens states that this EXM 438-1 version is not spare-part-compatible with the earlier EXM 438.
Is 6DD1607-0CA1 discontinued?
Siemens lists this exact order number as PM410: Product cancellation, effective 1 October 2022, and identifies it as a spare part. That is the official life-cycle wording used here.
What should be checked before ordering?
Match the complete order number and installed module label, then review the FM 458 configuration and engineering documents for compatibility.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
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