Features:
- One 10/100 Mbit/s Industrial Ethernet RJ45 interface
- PROFINET IO controller and S7 communication services
- ISO, TCP, UDP, SEND/RECEIVE, and FETCH/WRITE paths
Siemens 6GK7343-1EX21-0XE0 places Industrial Ethernet communication beside the S7-300 CPU on the station backplane.
Its protocol stack separates PROFINET IO, S7 communication, and open TCP or UDP data exchange into the configured connection types.
A C-PLUG, mode LEDs, and STEP 7 diagnostics preserve configuration and expose faults independently of normal cyclic controller processing.
The Siemens 6GK7343-1EX21-0XE0 Industrial Ethernet Communication Processor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK7343-1EX21-0XE0 Industrial Ethernet Communication Processor 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.
How protocols divide the data paths
- S7 services: 6GK7343-1EX21-0XE0 handles PG/OP traffic and configured S7 client or server connections.
- Open communication: ISO transport, ISO-on-TCP, TCP, and UDP connections carry user-defined data through communication blocks.
- S5-compatible path: SEND/RECEIVE and FETCH/WRITE preserve the specified S5-style data exchange methods.
- Management queries: SNMP v1 exposes standard network information without replacing STEP 7 communication diagnostics.
Controller access to distributed Ethernet I/O
- IO controller: 6GK7343-1EX21-0XE0 exchanges cyclic data with configured PROFINET IO devices.
- User program: PNIO communication blocks transfer the IO data between the processor and the S7 user program.
- Shared Ethernet: PROFINET IO can operate beside other configured communication services on the same RJ45 interface.
- Access protection: Configured IP access control is evaluated above the Ethernet visibility needed for PROFINET IO operation.
From S7 rack to plant Ethernet
- Rack position: The processor fits slots 4–11 in racks 0–3 connected through IM 360/361.
- Backplane link: The enclosed bus connector carries data between 6GK7343-1EX21-0XE0 and the S7-300 station.
- Common supply: CPU, communication processor, and interface module share the same 24 V DC supply arrangement.
- Ethernet attachment: The RJ45 port connects the completed station to the Industrial Ethernet network after rack wiring is finished.
Project data, addressing, and clock transfer
- Engineering route: STEP 7 with NCM S7 configures 6GK7343-1EX21-0XE0 through MPI or Industrial Ethernet.
- Address assignment: The factory MAC address provides the initial route for assigning IP parameters to the processor.
- Stored project: A C-PLUG keeps communication configuration available independently of the module electronics.
- Clock modes: SIMATIC frames or NTP queries synchronize the processor, which then updates the CPU time at defined intervals.