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6GK7343-1CX10-0XE0

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Siemens 6GK7343-1CX10-0XE0 is a SIMATIC NET CP 343-1 Lean communication processor that connects an S7-300 or C7-300 station to Industrial Ethernet through two switched RJ45 ports.
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Technical specifications for 6GK7343-1CX10-0XE0

  • Manufacturer:
    Siemens
  • Part Number:
    6GK7343-1CX10-0XE0
  • Product Family:
    Siemens Simatic Net
  • Product Type:
    CP 343-1 Lean Communication Processor
  • Stock:
    1
  • Ethernet Interfaces:
    2 x RJ45 with integrated switch
  • Transfer Rate:
    10 to 100 Mbit/s
  • Supported Transport Services:
    TCP/IP, UDP, multicast, ISO-on-TCP, and S7 communication
  • PROFINET Role:
    IO Device
  • Open Communication Connections:
    Up to 8
  • Maximum TCP/ISO User Data:
    8 KiB per job
  • Maximum UDP User Data:
    2 KiB per job
  • External Supply:
    24 V DC
  • Typical External Current:
    0.16 A
  • Typical Power Loss:
    5.8 W
  • Operating Temperature:
    0 to +60 °C for horizontal mounting; 0 to +40 °C for vertical mounting
  • Storage and Transport Temperature:
    -40 to +70 °C
  • Protection Rating:
    IP20
  • Engineering Software:
    STEP 7 V5.4 or STEP 7 Professional V11 and later
  • Diagnostics and Management:
    Web diagnostics, SNMP v1, LLDP, MRP, and NTP
  • Weight:
    0.659 lbs (0.299 kg)
  • Estimated shipping dimensions:
    2.5x21x29cm
  • 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 Ethernet PROFINET Connections Diagnostics

Features:

  • Two switched RJ45 ports place the S7-300 station on a 10/100 Mbit/s Industrial Ethernet segment.
  • S7 communication, TCP/IP, ISO-on-TCP, UDP, and multicast services share the module communication resources.
  • PROFINET IO device operation lets the station exchange cyclic data under an external IO controller.
Siemens 6GK7343-1CX10-0XE0 adds Industrial Ethernet communication to an S7-300 or C7-300 rack.

The CP exchanges data with the CPU through the backplane and sends it over the Ethernet ports according to the configured service.

Its diagnostics pages and management protocols provide link, time, and redundancy information during commissioning.

The Siemens 6GK7343-1CX10-0XE0 CP 343-1 Lean Communication Processor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK7343-1CX10-0XE0 CP 343-1 Lean 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.

Switched Ethernet Connection

  • Port arrangement: Two RJ45 sockets connect through one integrated switch.
  • Line rate: Each port negotiates 10 or 100 Mbit/s operation.
  • Network path: The switch can continue an Ethernet segment through the rack station.
  • Backplane role: Controller data enters the CP through the S7-300 backplane.

PROFINET IO Device Operation

  • Configured role: The CP operates as a PROFINET IO Device rather than an IO Controller.
  • Cyclic exchange: An external IO controller reads and writes the assigned process data.
  • Addressing: The device name and IP parameters identify the station on Ethernet.
  • Engineering: STEP 7 assigns the communication services and PROFINET data areas.

Communication Resource Limits

  • Open services: Up to eight open communication connections share the CP resources.
  • S7 channels: S7 server connections operate alongside configured open communication.
  • Message length: TCP and ISO jobs allow more user data than UDP datagrams.
  • Selection check: Connection counts and message sizes must be checked together before configuration.

Network Diagnosis and Recovery

  • Web pages: The integrated server reports module and connection state.
  • Management: SNMP and LLDP expose port and neighbor information.
  • Ring operation: MRP supports a configured Ethernet ring recovery path.
  • Time service: NTP synchronizes the CP clock with a network time source.
Description
Siemens 6GK7343-1CX10-0XE0 is a CP 343-1 Lean communication processor for the SIMATIC S7-300 and C7-300 control platforms. It occupies an S7-300 rack position and gives the controller an Industrial Ethernet path for S7 communication, open transport services, and PROFINET IO device operation.

The two RJ45 sockets on 6GK7343-1CX10-0XE0 form an integrated switch, so one cable can connect the station upstream while the second continues the Ethernet segment to another device. The ports negotiate 10 or 100 Mbit/s and keep network cabling separate from the S7 backplane connection used to exchange controller data.

External 24 V DC powers 6GK7343-1CX10-0XE0, while the backplane supplies the module-side logic connection to the CPU. Web diagnostics, SNMP, LLDP, MRP, and NTP expose link and network state for commissioning without changing the communication role assigned in STEP 7.
Alternative Names
6GK73431CX100XE0 6GK7343 1CX10 0XE0 6GK 7343 1CX10 0XE0 Siemens 6GK7343-1CX10-0XE0 6GK7343-1CX10-0XE0 CP 343-1 Lean Communication Processor 6GK7343-ICX10-0XE0 6GK7343-1CX1O-0XE0 6GK7343-1CX10-OXE0
Technical notes
On Siemens 6GK7343-1CX10-0XE0, the two RJ45 sockets are switch ports for one Ethernet interface; they do not create two independent controller networks.
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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 Siemens 6GK7343-1CX10-0XE0 show link on both RJ45 ports but still fail to exchange S7 data?
On Siemens 6GK7343-1CX10-0XE0, verify the configured IP parameters, rack slot, S7 connection resources, CPU data blocks, and partner address after confirming physical link.
Can the two RJ45 sockets on 6GK7343-1CX10-0XE0 be configured as separate IP networks?
No. The two sockets on 6GK7343-1CX10-0XE0 belong to one integrated switch and one Industrial Ethernet interface.
What should be checked when UDP telegrams from Siemens 6GK7343-1CX10-0XE0 are truncated or rejected?
For Siemens 6GK7343-1CX10-0XE0, keep the configured UDP user data within the documented 2 KiB limit and match the partner port and message format.
Why does PROFINET commissioning fail when 6GK7343-1CX10-0XE0 is configured as a controller?
The 6GK7343-1CX10-0XE0 supports the PROFINET IO Device role, so an external IO Controller must own the cyclic connection.
How should an intermittent ring fault around Siemens 6GK7343-1CX10-0XE0 be investigated?
Use Siemens 6GK7343-1CX10-0XE0 web diagnostics, SNMP counters, LLDP neighbor data, and MRP state to identify the affected port or cable.
Which power paths must be present before 6GK7343-1CX10-0XE0 can communicate?
The 6GK7343-1CX10-0XE0 requires its external 24 V DC supply and a valid seated backplane connection to the S7-300 rack.