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6GK7343-1EX11-0XE0

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An S7-300 station uses Siemens 6GK7343-1EX11-0XE0 as a SIMATIC NET CP 343-1 communication processor for S7, ISO, TCP/IP and UDP exchange over Industrial Ethernet.
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Technical specifications for 6GK7343-1EX11-0XE0

  • Manufacturer:
    Siemens
  • Part Number:
    6GK7343-1EX11-0XE0
  • Product Family:
    Siemens Simatic S7-300
  • Product Type:
    SIMATIC NET CP 343-1 Industrial Ethernet Communication Processor
  • Stock:
    1
  • Industrial Ethernet Interfaces:
    1
  • Ethernet Connection:
    RJ45 port / AUI
  • Transfer Rate:
    10 to 100 Mbit/s
  • Communication Services:
    S7 communication, ISO transport, TCP/IP and UDP
  • S5-Compatible Services:
    SEND/RECEIVE and FETCH/WRITE
  • RFC 1006:
    Supported
  • Multicast:
    Supported
  • Initialization:
    Through LAN
  • External Supply:
    24 V DC
  • Backplane Supply:
    5 V DC
  • External Current Consumption:
    200 mA maximum
  • Backplane Current Consumption:
    1 A maximum
  • Maximum Power Loss:
    5.8 W
  • Protection Rating:
    IP20
  • Rail Mounting:
    S7-300 mounting rail
  • Weight:
    1.3228 lbs (0.6 kg)
  • Estimated shipping dimensions:
    13.6x14.5x10.6cm
  • Tariff Code:
    85176200
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Protocol Paths CPU to Ethernet Supply Connections Address Initialization

Features:

  • One Industrial Ethernet interface links the S7-300 station to the network.
  • Open and S7 communication services share the configured processor connections.
  • External 24 V DC and the 5 V backplane feed different module sections.
CPU communication jobs cross the S7-300 backplane before entering the network stack.

SEND/RECEIVE and FETCH/WRITE provide the documented S5-compatible exchange paths.

LAN initialization and front diagnostics support commissioning without combining network and CPU faults.

The Siemens 6GK7343-1EX11-0XE0 CP 343-1 Communication Processor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK7343-1EX11-0XE0 CP 343-1 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.

Assigning controller jobs to the configured Ethernet service

  • S7 communication: Configured S7 connections exchange controller and operator data.
  • Open communication: ISO, ISO-on-TCP, TCP and UDP carry user-defined telegrams.
  • S5-compatible blocks: SEND/RECEIVE and FETCH/WRITE expose the documented data paths.
  • Multicast: Selected UDP traffic can be delivered to configured multicast groups.

Moving data from the rack backplane to the plant network

  • Backplane side: The S7-300 bus transfers CPU communication jobs to the processor.
  • Network side: One RJ45/AUI interface sends the resulting frames to Industrial Ethernet.
  • Connection table: Configured partners and protocol types determine how each job is handled.
  • Status separation: Processor diagnostics remain distinct from ordinary CPU program execution.

Powering controller and network sections through separate paths

  • External input: A 24 V DC terminal supplies the communication processor electronics.
  • Rack input: The S7-300 backplane provides the documented 5 V DC current.
  • Wiring check: Both supplies must be present before network and rack operation can be evaluated together.
  • Power indication: Front status identifies module supply before connection diagnostics are interpreted.

Establishing network parameters before communication starts

  • LAN initialization: The processor accepts initial network settings through the Ethernet path.
  • Project data: Connection parameters must match the S7 engineering configuration.
  • Partner check: Remote IP and protocol definitions are verified for each configured connection.
  • Diagnostics: Expanded records separate address, link and communication-job conditions.
Description
Installed beside an S7-300 CPU, Siemens 6GK7343-1EX11-0XE0 is the SIMATIC NET CP 343-1 communication processor that gives the station an Industrial Ethernet connection. CPU data reaches the processor across the backplane, and the external interface carries the configured S7, ISO, TCP/IP or UDP communication.

Through SEND/RECEIVE and FETCH/WRITE services, 6GK7343-1EX11-0XE0 maps user-program communication jobs onto the selected network connection. RFC 1006 support places ISO-on-TCP traffic on the TCP/IP stack without changing the S7 backplane path.

External 24 V DC powers the network section of 6GK7343-1EX11-0XE0, while the S7-300 rail and backplane provide the controller-side 5 V connection. The front Ethernet port and supply terminal therefore serve different electrical paths even though both are required for station communication.

Initialization through LAN lets 6GK7343-1EX11-0XE0 receive its network parameters before configured connections start. Front indicators and expanded diagnostics distinguish processor state, Ethernet activity and connection faults from the CPU program itself.
Alternative Names
6GK73431EX110XE0 6GK7 343-1EX11-0XE0 6GK7343 1EX11 0XE0 Siemens CP343-1 6GK7343-1EX11-0XE0 SIMATIC NET CP 343-1 S7-300 Ethernet Communication Processor 6GK7343-IEX11-0XE0 6GK7343-1EXII-0XE0
Technical notes
The RJ45/AUI interface on Siemens 6GK7343-1EX11-0XE0 carries one Industrial Ethernet connection. Preserve its address and configured communication connections.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why can the S7-300 CPU detect 6GK7343-1EX11-0XE0 while Ethernet communication is unavailable?
The backplane and external network sections of 6GK7343-1EX11-0XE0 use separate paths. Check the 24 V DC supply, Ethernet link, assigned address and configured partner connections.
Which protocol should be selected for a user telegram on 6GK7343-1EX11-0XE0?
Choose the ISO, ISO-on-TCP, TCP or UDP connection supported by the partner and configure the corresponding communication blocks for 6GK7343-1EX11-0XE0.
How is the first network address assigned to Siemens 6GK7343-1EX11-0XE0?
Use the documented LAN initialization procedure for Siemens 6GK7343-1EX11-0XE0, then load the matching S7 and connection configuration before starting data exchange.
What should be preserved before replacing 6GK7343-1EX11-0XE0?
Keep the exact S7 hardware project, IP or ISO addressing, connection table and communication-block assignments for 6GK7343-1EX11-0XE0.
Can 6GK7343-1EX11-0XE0 exchange S5-style data over Ethernet?
Yes. Siemens 6GK7343-1EX11-0XE0 provides SEND/RECEIVE and FETCH/WRITE services over the documented network connection types.
Why does 6GK7343-1EX11-0XE0 need both 5 V and 24 V supplies?
The S7-300 backplane supplies the controller interface of 6GK7343-1EX11-0XE0, while the external 24 V DC connection powers its communication electronics.