Siemens 6DD1607-0EA2 SIMATIC S7-400 EXM 448-2 Communication Expansion
01Technical Summary
Siemens 6DD1607-0EA2 is the EXM 448-2 communication expansion for the SIMATIC S7-400 FM 458-1 DP application module. It provides two SIMOLINK fiber-optic interfaces for high-speed communication and can couple multiple FM 458-1 DP application modules synchronously with the configured sampling time. The module is intended for an engineered FM 458 system rather than stand-alone communication service, so the existing rack, base module, SIMOLINK topology, option-module use and application project must be verified together.
02Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6DD1607-0EA2 |
| Product Designation | EXM 448-2 |
| Product Family | SIMATIC S7-400 / FM 458 |
| Module Function | Universal communication expansion |
| Primary Communication | Two SIMOLINK fiber-optic interfaces |
| Host Module | FM 458-1 DP application module |
| Synchronous Coupling | Multiple FM 458-1 DP application modules at the configured sampling time |
| Option Interface | Carrier function for a compatible MASTERDRIVES option module |
| Supply | 5 V DC from the host system |
| Installation Space | One expansion-module slot |
| Commercial Position | Legacy spare-part / product-cancellation planning required |
03Features
Key Functions
- Provides two dedicated SIMOLINK optical interfaces for deterministic communication within an FM 458 application.
- Supports synchronous coupling of multiple FM 458-1 DP application modules when the system project is configured accordingly.
- Uses fiber-optic links to separate the communication path from copper-based cabinet interference.
- Installs as an optional expansion on the FM 458-1 DP rather than operating as an independent S7-400 communications processor.
- Can carry a supported MASTERDRIVES option module in the documented EXM 448-2 arrangement.
- When the option-module function is used, the documented interface restrictions must be observed; the second SIMOLINK path is not automatically available in every configuration.
Identification
- Manufacturer: Siemens
- Model: 6DD1607-0EA2
- Product Type: SIMATIC S7-400 EXM 448-2 communication expansion module
- Status: Legacy spare-part review
04Compatibility
- Confirm that the host is an FM 458-1 DP and that an EXM 448-2 expansion position is available.
- Match both SIMOLINK optical channels, connectors, fiber type, node order, master/slave role and configured transmission topology.
- Review the CFC application, sampling times, synchronous coupling and all connected FM 458 modules before exchanging hardware.
- If a MASTERDRIVES option module is mounted, verify the exact option type and the documented effect on the second SIMOLINK interface.
- Retain the rack configuration, firmware information, application backup and optical-network documentation for commissioning.
- A generic S7-400 communications processor is not a functional substitute for this FM 458 expansion module.
05Replacement
- Treat this article as a legacy spare-part requirement and confirm current Siemens service availability before ordering.
- No automatic successor is asserted for this page because compatibility depends on the complete FM 458 and SIMOLINK architecture.
- Back up the CFC project and record the host FM 458-1 DP version, rack position, application sampling times and SIMOLINK node sequence.
- Inspect optical connectors and fibers before attributing communication faults to the module.
- After replacement, validate both optical paths, synchronous data exchange, diagnostics, application timing and every dependent drive or automation function.
06FAQ
What is Siemens 6DD1607-0EA2?
It is the EXM 448-2 communication expansion module used with an FM 458-1 DP application module in a SIMATIC S7-400 system.
How many SIMOLINK interfaces are provided?
The EXM 448-2 provides two SIMOLINK fiber-optic interfaces, subject to the documented option-module configuration restrictions.
Can the module operate independently?
No. It is an optional expansion for the FM 458-1 DP and must be engineered as part of that application system.
What must be checked when an option module is installed?
Confirm the exact MASTERDRIVES option module and the Siemens interface assignment because use of the option position can disable the second SIMOLINK interface.
Is a standard S7-400 communications processor equivalent?
No. A standard communications processor does not reproduce the EXM 448-2 SIMOLINK and FM 458 synchronous-coupling functions.
What should be tested after replacement?
Test optical communication, node order, both available SIMOLINK paths, synchronous coupling, sampling-time behavior, diagnostics and every dependent drive function.
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