CP 343-1 Advanced communication processor for PROFINET IO and Industrial Ethernet integration in SIMATIC S7-300 systems.
Siemens 6GK7343-1GX21-0XE0 is the SIMATIC NET CP 343-1 Advanced communication processor for connecting a SIMATIC S7-300 station to Industrial Ethernet. The official Siemens manual documents PROFINET IO controller and PROFINET CBA controller functions for this order code. Procurement and replacement planning should verify the complete suffix, installed S7-300 CPU, STEP 7 project, firmware, Ethernet topology, connector arrangement and power conditions. Siemens also documents this processor as a replacement path for defined earlier CP 343-1 versions, but the listed functional differences and configuration requirements must be reviewed before installation rather than assuming direct interchangeability.
| 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.
| Manufacturer | Siemens |
|---|---|
| Complete Part Number | 6GK7343-1GX21-0XE0 |
| Product Type | SIMATIC NET CP 343-1 Advanced communication processor |
| Series | SIMATIC NET / SIMATIC S7-300 |
| Host System | SIMATIC S7-300 |
| Network | Industrial Ethernet and PROFINET IO |
| Controller Functions | PROFINET IO controller and PROFINET CBA controller |
| Supply Voltage | 24 V DC |
| Maximum Current Load | 0.15 A at 24 V DC; 0.2 A at 5 V DC |
| Documented Ambient Range | 0 to 60 °C |
| Temperature Class | T4 |
| Country of Origin | GERMANY |
| Application | Engineering Relevance |
|---|---|
| S7-300 Ethernet integration | Adds documented Industrial Ethernet communications to a verified SIMATIC S7-300 station. |
| PROFINET IO control | Supports the controller role when the CPU, devices, firmware and STEP 7 configuration are compatible. |
| PROFINET CBA communication | Provides documented component-based automation functions for suitable legacy projects. |
| Earlier CP replacement review | Can be evaluated against defined earlier CP 343-1 versions only after Siemens replacement caveats are checked. |
The reviewed Siemens technical documents confirm the exact order code and its CP 343-1 Advanced architecture but do not provide a current product lifecycle label. No Active, Classic or Discontinued status is assigned here. Siemens replacement guidance covers migration from defined earlier CP 343-1 versions with functional differences and configuration conditions, so compatibility must be checked against the installed CPU, firmware, STEP 7 project and network design.
6GK7343-1GX21-0XE0 identifies a Siemens SIMATIC NET CP 343-1 Advanced communication processor for SIMATIC S7-300.
The official technical documents reviewed do not provide a current exact lifecycle label, so this page does not classify the processor as Active or Discontinued.
Siemens documents Industrial Ethernet communication together with PROFINET IO controller and PROFINET CBA controller functions.
Not automatically. Siemens lists defined replacement cases, but functional differences, firmware and project configuration must be reviewed.
Confirm the S7-300 CPU, rack position, STEP 7 project, firmware, network topology, supply and connectors.
Yes. Available evidence can include the complete module, readable MLFB label, Ethernet interfaces, LEDs and packaging condition.
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.
A documented route from model verification to after-sales response.
Model and suffix verification, product and label photo confirmation, and condition confirmation before quotation.
Technical compatibility review covering interfaces, power, connectors, hardware revision and installed-system context.
Visual inspection, label checking and available functional evidence are organized for buyer review.
Protective packaging is selected for the housing, connectors and accessories before dispatch.
Worldwide shipping, shipment tracking and customs documentation are coordinated without unverified delivery promises.
Written warranty terms, a return authorization process and after-sales response support accountable communication.
| Quality inspection | Visible condition, label details and included items are checked against the agreed scope. |
|---|---|
| Label verification | The complete part number, suffix and available revision markings are compared before dispatch. |
| Packaging handling | Connectors and housings receive protective packing appropriate to international transport. |
| Documentation | Commercial and customs documents are prepared for the agreed shipment arrangement. |
| After-sales communication | Questions are handled with the order record, inspection evidence and written terms available for review. |
Check whether the supplier preserves complete part numbers, provides traceable photographs, explains commercial terms in writing and asks for installed-system details before claiming compatibility.
Request clear product, nameplate, connector, seal, accessory and packaging photos together with written condition, warranty and shipping terms.
Watch for shortened model numbers, copied specifications, unclear condition, unverifiable inventory quantities, guaranteed compatibility without engineering review and pressure to accept undocumented substitutes.
Compare the complete suffix, hardware revision, electrical ratings, interfaces, connectors, software requirements, project configuration, mounting and official migration guidance.
Share the complete part number, quantity, destination and clear label photos for a focused availability and compatibility review.
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