Features:
- The EXM 448 adds a PROFIBUS-DP communication path to an FM 458 application module.
- COM-PROFIBUS parameterizes the documented DP-master configuration.
- Separate green and yellow indicators report processor initialization and bus condition.
The EXM 448 architecture places 6DD1607-0EA0 beside the FM 458 so the expansion can exchange data through the internal P-bus and LE-bus connections.
PROFIBUS-DP traffic leaves 6DD1607-0EA0 through its fieldbus connector, while the MASTERDRIVES option position is reserved for the documented plug-in module path.
COM-PROFIBUS supplies the master parameter set used by 6DD1607-0EA0, and the compatible operating-system version must be checked before that configuration is loaded.
The Siemens 6DD1607-0EA0 SIMATIC S7-400 EXM 448 Communication Expansion Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6DD1607-0EA0 SIMATIC S7-400 EXM 448 Communication Expansion Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD. USD.
How the EXM 448 establishes the fieldbus path
- Host relationship: 6DD1607-0EA0 operates as the communication expansion attached to an FM 458 application module.
- Fieldbus path: The external connector carries the PROFIBUS-DP network connection.
- Master setup: COM-PROFIBUS supplies the parameterization used for DP-master operation.
- Version check: The compatible FM 458 operating-system version must match the selected parameter set.
Data movement between the expansion and FM 458
- P-bus link: The SIMATIC P-bus on 6DD1607-0EA0 forms part of the internal S7-400 module connection.
- LE-bus link: The LE-bus provides the companion internal path between the EXM 448 and its host environment.
- Option position: A dedicated position accepts the documented MASTERDRIVES option module.
- Slot use: The EXM 448 occupies one S7-400 module slot.
Reading processor and PROFIBUS conditions
- Green indicator: On 6DD1607-0EA0, the green LED reports initialization of the associated processor connection.
- Yellow indicator: The yellow LED reports whether PROFIBUS operation is absent, faulty, restricted or active.
- Access point: Both indicators are visible through the ventilation slots at the top of the housing.
- Error separation: Flash patterns distinguish a bus cable fault from a missing or mismatched COM database.
Conditions that define a usable master configuration
- Software tool: 6DD1607-0EA0 uses COM-PROFIBUS for the specified DP-master parameterization.
- Database state: A missing or inactive COM database prevents normal fieldbus operation.
- Configuration match: CFC and COM settings must agree to avoid restricted bus operation.
- Cabinet boundary: The EXM 448 is specified for installation inside a closed control cabinet.