Overview
Manuals
FM 458 Compatibility
Analog I/O Channels
Encoder Interfaces
Features:
- Mixed-signal expansion: Combines sixteen digital inputs, eight digital outputs and five differential analog inputs for the documented FM 458 arrangement.
- Two output-resolution groups: Four analog outputs provide 16-bit conversion and four provide 12-bit conversion over the specified voltage range.
- Encoder interfaces: Supports up to eight incremental and four absolute encoders within Siemens' stated interface and configuration limits.
EXM 438-1 extends a configured FM 458 system with field-signal and encoder interfaces. Power, grounding, connection accessories and control-project assignments must be evaluated together; a matching connector shape alone does not establish compatibility.
The complete 6DD1607-0CA1 order number is important during maintenance because Siemens states that EXM 438-1 is not spare-part compatible with EXM 438. Preserve the installed project and compare the exact hardware and documentation edition before planning the replacement.
Siemens identifies 6DD1607-0CA1 as a spare part with PM410 product cancellation effective October 1, 2022. Moore Automated can check replacement supply subject to exact-model, revision, condition and availability confirmation.
Siemens 6DD1607-0CA1 product data sheet Manual(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.
Documented expansion arrangement
EXM 438-1 exchanges process data with the FM 458 through the documented LE-bus arrangement. The S7-400 backplane supplies power. Siemens explicitly states that EXM 438-1 is not spare-part compatible with EXM 438.
Different conversion groups
The current exact-model data sheet specifies five differential analog inputs and eight analog outputs. Four outputs are 16-bit and four are 12-bit. Use the channel-specific limits and do not apply one output group's specifications to the other.
Interface and cable verification
The documented capacity is eight incremental and four absolute encoders. Check the actual signal format, cable length, supply requirements and SSI or EnDat configuration against the system instructions before connection.
