SIMATIC NET · S7-300 INDUSTRIAL ETHERNET
A legacy Ethernet communications processor for connecting SIMATIC S7-300 stations through Siemens-supported industrial protocols.
Siemens 6GK7343-1EX11-0XE0 is a CP 343-1 communications processor for connecting SIMATIC S7-300 to Industrial Ethernet. Siemens lists ISO, TCP/IP and UDP, S7 communication, fetch/write, SEND/RECEIVE with and without RFC1006, diagnostic extensions, multicast, PBK and initialization via LAN.
Siemens identifies 6GK7343-1EX30-0XE0 as the successor. Replacement planning should compare the installed S7-300 CPU, STEP 7 hardware configuration, firmware, communication connections and project backup.
| Record | Manufacturer-Verified Position |
|---|---|
| Complete order number | 6GK7343-1EX11-0XE0 |
| Lifecycle | Discontinued |
| Successor | 6GK7343-1EX30-0XE0 |
| Official evidence | Siemens SiePortal product record for the complete order number |
| Parameter | Verified Detail |
|---|---|
| Product designation | SIMATIC NET CP 343-1 communications processor |
| Controller system | SIMATIC S7-300 |
| Network | Industrial Ethernet |
| Protocols | ISO, TCP/IP and UDP |
| S7 communication services | S7 communication, fetch/write and SEND/RECEIVE |
| RFC1006 | Operation with and without RFC1006 |
| Additional functions | Diagnostic extensions, multicast and PBK |
| Initialization | Via LAN |
| Transmission rate | 10/100 Mbit/s |
| Packaging dimensions | 14.5 × 13.6 × 10.6 cm |
| Net weight | 0.607 kg |
| Country of origin | Germany |
For final identification, compare three concise image views with the installed unit.



Connects an S7-300 station to Industrial Ethernet for configured controller communication.
Supports the Siemens-documented ISO, TCP/IP, UDP and S7 services required by the project.
Supports planned exchange work when the existing module carries the identical complete order number.
Match the complete order number 6GK7343-1EX11-0XE0 and front-label revision.
Check the installed S7-300 CPU against Siemens CPU/CP compatibility information.
Record STEP 7 hardware configuration, firmware and configured connections.
Review successor migration requirements before substituting 6GK7343-1EX30-0XE0.
Siemens SiePortal states that the main product is discontinued and identifies 6GK7343-1EX30-0XE0 as its successor.
It is a SIMATIC NET CP 343-1 communications processor for connecting SIMATIC S7-300 to Industrial Ethernet.
Siemens lists ISO, TCP/IP, UDP, S7 communication, fetch/write and SEND/RECEIVE with and without RFC1006.
Siemens SiePortal states that the main product is discontinued.
Migration depends on the installed CPU, STEP 7 project, firmware, communication connections and network design.
Send the full nameplate, installed CPU and STEP 7 project details for a focused compatibility review.
Email: sales6@apterpower.com | WhatsApp: +86 181 5988 9985
Lifecycle-Aware Industrial Support
A focused workflow for identification, S7-300 compatibility review, physical inspection and protected delivery.
STEP 01
We organize front-label, side-label and connector-area evidence around the complete order number, visible hardware revision and module condition.
STEP 02
The installed CPU, STEP 7 hardware catalog entry, firmware, network addressing and configured connections are compared with the requested CP 343-1.

STEP 03
Visible housing, connector and label condition are recorded before protective packing and shipment planning for the confirmed destination.
Supply and interchange review are tied to the complete 6GK7343-1EX11-0XE0 request, the installed S7-300 environment and documented project requirements.
Send the module label, installed CPU and project details for service scope, compatibility and delivery review.
Email: sales6@apterpower.com | WhatsApp: +86 181 5988 9985
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Send the exact model and quantity for availability, compatibility, warranty and worldwide delivery review.
Email: sales6@apterpower.com | WhatsApp: +86 181 5988 9985