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6GK7343-1GX21-0XE0

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Siemens 6GK7343-1GX21-0XE0 is a SIMATIC S7-300 CP 343-1 Advanced processor that links the controller to Industrial Ethernet for PROFINET, open communication, and IT services.
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Technical specifications for 6GK7343-1GX21-0XE0

  • Manufacturer:
    Siemens
  • Part Number:
    6GK7343-1GX21-0XE0
  • Product Family:
    Siemens Simatic S7-300
  • Product Type:
    CP 343-1 Advanced Industrial Ethernet Communication Processor
  • Stock:
    1
  • Ethernet Rate:
    10 to 100 Mbit/s
  • Ethernet Connection:
    RJ45
  • Open Protocols:
    ISO, TCP, ISO-on-TCP, UDP, and multicast
  • Open-Communication Connections:
    16 maximum
  • Maximum ISO or TCP User Data:
    8 KiB per connection
  • Maximum UDP User Data:
    2 KiB per connection
  • Maximum Multicast Stations:
    16
  • S7 Communication Connections:
    16 maximum
  • Active Multiprotocol Connections:
    48 maximum
  • FTP Client Connections:
    10 maximum
  • FTP Server Connections:
    2 maximum
  • HTTP Server Connections:
    4 maximum
  • Email Client Connections:
    1
  • Flash File System:
    28 MiB
  • RAM File Storage:
    30 MiB
  • PROFINET IO Devices:
    125 maximum
  • PROFINET Input Data:
    4 KiB maximum
  • PROFINET Output Data:
    4 KiB maximum
  • Backplane Supply:
    5 V DC
  • External Supply:
    24 V DC
  • Typical Backplane Current:
    0.14 A
  • Power Loss:
    14.7 W
  • Protection Rating:
    IP20
  • Weight:
    0.94 lbs (0.425 kg)
  • Estimated shipping dimensions:
    14.4x13.2x10.4cm
  • 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 IE Protocols PN IO IT Services Rack Limits

Features:

  • Industrial Ethernet communication includes ISO, TCP, ISO-on-TCP, UDP, and multicast.
  • PROFINET IO controller operation supports up to 125 configured IO devices.
  • FTP, HTTP, email, SNMP, DHCP, and NTP extend the processor beyond cyclic control traffic.
Siemens 6GK7343-1GX21-0XE0 gives an S7-300 station a CP 343-1 Advanced connection to Industrial Ethernet.

The connection resources of 6GK7343-1GX21-0XE0 are shared across open communication, S7 traffic, PROFINET, and IT services.

Flash and RAM file areas allow 6GK7343-1GX21-0XE0 to serve or transfer stored content while the controller exchanges process data.

The Siemens 6GK7343-1GX21-0XE0 CP 343-1 Advanced 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 6GK7343-1GX21-0XE0 CP 343-1 Advanced 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.

Open Ethernet Communication

  • ISO transport: ISO communication carries configured data directly over the Industrial Ethernet service.
  • TCP transport: TCP provides a connection-oriented IP path for larger user-data blocks.
  • ISO-on-TCP: ISO-on-TCP adds the ISO transport service above TCP/IP for partners configured for that protocol.
  • UDP transport: UDP sends shorter datagrams without the connection handling used by TCP.
  • Multicast: A configured sender can address multiple multicast stations without creating a separate unicast path for every partner.

PROFINET Controller Operation

  • Controller role: 6GK7343-1GX21-0XE0 exchanges cyclic input and output data as the PROFINET IO controller.
  • Device count: That controller configuration can include up to 125 PROFINET IO devices.
  • Process-data areas: The input and output directions each provide up to 4 KiB for the controller exchange.
  • Diagnostic path: PROFINET diagnostics distinguish link, device, and configuration faults from errors in the CPU program.

Stored Content and Network Services

  • FTP client: The CP initiates configured transfers from its file area to an Ethernet file server.
  • FTP server: Remote clients use the separate server connections to access permitted files on the processor.
  • HTTP service: The integrated HTTP connections serve stored web content to configured browser clients.
  • Email service: The email client sends configured messages through the Ethernet network.
  • Network support: NTP supplies time synchronization while DHCP can provide the configured IP addressing arrangement.

S7-300 Installation Resources

  • Backplane supply: The S7-300 rack supplies 5 V DC to the internal module electronics.
  • External supply: A separate 24 V DC feed powers the communication processor through its external supply connection.
  • Shared dependency: 6GK7343-1GX21-0XE0 needs both the rack interface and the external feed before its Ethernet services can operate.
  • Thermal planning: The documented 14.7 W power loss becomes cabinet heat, so mounting orientation and enclosure temperature must be evaluated together.
Description
Siemens 6GK7343-1GX21-0XE0 is a CP 343-1 Advanced communication processor for the SIMATIC S7-300 system. It places the controller on Industrial Ethernet and handles PROFINET IO controller duties, S7 communication, open TCP/IP services, and IT functions outside the CPU's onboard interface.

Through the RJ45 Ethernet connection, 6GK7343-1GX21-0XE0 carries ISO, TCP, UDP, ISO-on-TCP, multicast, and SEND/RECEIVE traffic. Each service uses its own configured connections and data limits, so an application must allocate resources across all protocols rather than count each service independently.

As a PROFINET IO controller, 6GK7343-1GX21-0XE0 exchanges cyclic input and output data with configured IO devices. The module maps those device values to the S7 station while diagnostics distinguish Ethernet-link faults, partner failures, and controller-side configuration errors.

The file system in 6GK7343-1GX21-0XE0 supports FTP client/server, HTTP, email, and stored web content. Flash storage holds retained files, RAM serves active data, and NTP CPU synchronization aligns controller time with the Ethernet time source.
Alternative Names
6GK73431GX210XE0 6GK7343 1GX21 0XE0 Siemens 6GK7343-1GX21-0XE0 CP 343-1 Advanced SIMATIC NET CP343-1 ADV 6GK7343-1GX21-0XE0 Ethernet CP S7-300 PROFINET IO controller CP Siemens CP343-1 Advanced 6GK7 343-1GX21-0XE0
Technical notes
Mounted in a SIMATIC S7-300 rack, Siemens 6GK7343-1GX21-0XE0 combines PROFINET IO controller operation with open Ethernet and IT communication services.
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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 6GK7343-1GX21-0XE0 run out of connections before reaching one protocol's limit?
Siemens 6GK7343-1GX21-0XE0 shares resources across open, S7, PROFINET, and IT services, so the complete connection plan must be counted together.
What should be checked when a UDP partner receives truncated data from 6GK7343-1GX21-0XE0?
The 6GK7343-1GX21-0XE0 has a smaller documented user-data limit for UDP than for ISO or TCP, so block length and application framing require review.
Can 6GK7343-1GX21-0XE0 serve files while controlling PROFINET IO devices?
Yes, 6GK7343-1GX21-0XE0 supports FTP and HTTP beside PROFINET IO, provided the configured services remain within connection, memory, and performance limits.
Why does the S7-300 CPU time differ from the network time on 6GK7343-1GX21-0XE0?
For 6GK7343-1GX21-0XE0, verify the NTP server, time zone handling, synchronization configuration, network reachability, and whether CPU time forwarding is enabled.
What causes a PROFINET device to remain unavailable behind 6GK7343-1GX21-0XE0?
The 6GK7343-1GX21-0XE0 requires matching device name, IP parameters, hardware configuration, and reachable Ethernet topology before cyclic IO exchange can start.

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