Official Siemens documentation confirms the EXM 478 order code and its three interface-submodule receptacles.
Siemens 6ES7478-2AC00-0AC0 is the EXM 478 expansion module documented for SIMATIC M7-400 configurations. Its primary role is to provide three receptacles for compatible interface submodules, allowing an M7-400 application function module or central processor configuration to be extended with the interfaces required by the engineered system. Siemens documentation also lists the module within AS 488/TM hardware built in M7-400 design. Replacement procurement should verify the complete order code, host module, expansion position, installed IF submodules, addressing, interrupt assignments, signal routing and the existing engineering records. Similar 478-series modules serve different functions and must not be substituted by appearance alone.
| Commercial Item | Status |
|---|---|
| Product Condition | Original new |
| Availability | In stock |
| Warranty | With 1 year warranty |
| Shipping | Worldwide shipping options available |
Condition, availability and warranty are Stockoems commercial information, not manufacturer commitments.
| Item | Officially Confirmed Information |
|---|---|
| Manufacturer | Siemens |
| Complete Part Number | 6ES7478-2AC00-0AC0 |
| Manufacturer Order Code | 6ES7 478-2AC00-0AC0 |
| Product Type | EXM 478 expansion module |
| Platform | SIMATIC M7-400 |
| Interface Submodule Capacity | 3 receptacles |
| Rack Space | 1 slot |
| Module Height | 290 mm |
| Depth | 210 mm; 227.5 mm when fitted |
| Documented System Use | M7-400 expansions and AS 488/TM configurations |
| Country of Origin | GERMANY |
| Application Context | Required Review |
|---|---|
| M7-400 interface expansion | Confirm the host module and available expansion position. |
| AS 488/TM maintenance | Match the documented M7-400 architecture and installed system revision. |
| IF submodule integration | Identify each installed IF type, address range, interrupt and signal path. |
| Legacy control-system spare planning | Retain configuration records and label photographs for the complete assembly. |
The reviewed Siemens manuals confirm the exact 6ES7478-2AC00-0AC0 order code and EXM 478 function but do not state a current Product Lifecycle Management classification. This page therefore does not label the module Active, Classic, Obsolete or Discontinued.
It is the SIMATIC M7-400 EXM 478 expansion module with three receptacles for compatible interface submodules.
Official Siemens documentation specifies three interface-submodule receptacles.
Siemens documents it within M7-400 expansion configurations and AS 488/TM hardware in M7-400 design.
The reviewed official documentation does not provide a current lifecycle classification, so no discontinuation claim is made.
No. ATM, MSM, TPM and EXM 478 products perform different functions; the complete order code and system design must be checked.
Check the host hardware, installed IF submodules, addresses, interrupt routing, mechanical position, configuration records and label photographs.
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.
Structured checks for Siemens 6ES7478-2AC00-0AC0 identity, installed interface submodules, visible condition and international shipment preparation.
Request exact model verification, readable label photographs, condition evidence, written commercial terms, traceable contact information and a documented return process.
Review the host system, hardware revision, installed submodules, connectors, addressing, software records and installation constraints.
Risks include incomplete suffixes, reused photographs, unverifiable claims, pressure to accept a similar model and promises of stock or delivery without evidence.
They help protect sensitive industrial electronics and create a traceable handover from inspection through delivery.
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