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6GK7343-1GX31-0XE0

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The Siemens 6GK7343-1GX31-0XE0 CP 343-1 Advanced links an S7-300 CPU to Industrial Ethernet as a PROFINET IO controller or device.
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Technical specifications for 6GK7343-1GX31-0XE0

  • Manufacturer:
    Siemens
  • Part Number:
    6GK7343-1GX31-0XE0
  • Product Family:
    Siemens Simatic S7-300
  • Product Type:
    CP 343-1 Advanced Communications Processor
  • Stock:
    1
  • Industrial Ethernet Interfaces:
    3
  • Gigabit Interface:
    1 RJ45, 10 to 1000 Mbit/s
  • PROFINET Interface:
    2 RJ45, 10 to 100 Mbit/s
  • External Supply:
    24 V DC, -15%/+20%
  • Backplane Supply:
    5 V DC
  • External Current:
    0.48 A typical; 0.62 A maximum
  • Backplane Current:
    0.14 A typical
  • Power Loss:
    14.7 W
  • Protection Degree:
    IP20
  • Open Communication Connections:
    16 maximum
  • S7 Communication Connections:
    16 maximum
  • Multi-Protocol Connections:
    48 active maximum
  • Flash File System:
    28 Mibyte
  • RAM File System:
    30 Mibyte
  • PROFINET IO Devices:
    128 maximum
  • PN IO Process Data:
    4 Kibyte inputs and 4 Kibyte outputs
  • Required STEP 7:
    V5.5 SP2 HF1 or STEP 7 Professional V12 and higher
  • Firewall Type:
    Stateful inspection
  • VPN:
    IPSec, up to 32 connections
  • Media Redundancy:
    MRP supported
  • Web Diagnostics:
    Supported
  • Time Synchronization:
    NTP supported
  • Weight:
    1.1177 lbs (0.507 kg)
  • Estimated shipping dimensions:
    3.5x12.9x14.2cm
  • 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 Roles Data Services Security Controls Network Resilience

Features:

  • The CP connects an S7-300 CPU to Industrial Ethernet through three RJ45 network connections.
  • PROFINET IO controller and device roles can operate with RT, IRT and MRP services.
  • Stateful firewall and IPSec VPN functions protect the configured network boundary.
The Gigabit-facing port and the paired PROFINET ports have different speeds and network responsibilities.

Open communication, S7 messaging and IT services share the processor while retaining their documented connection limits.

STEP 7 assigns the interface roles, diagnostics, redundancy and access-control settings used by the installed CP.

The Siemens 6GK7343-1GX31-0XE0 CP 343-1 Advanced Communications Processor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK7343-1GX31-0XE0 CP 343-1 Advanced Communications 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 the three Ethernet connections divide their work

  • Gigabit side: The first RJ45 interface negotiates from 10 to 1000 Mbit/s for the broader Industrial Ethernet connection.
  • PROFINET side: Two 10/100 Mbit/s RJ45 ports form the real-time PROFINET interface.
  • Controller role: The CP can coordinate up to 128 PROFINET IO devices.
  • Device role: The CP can also expose up to 32 submodules while operating as a PROFINET IO device.

Open communication and IT services

  • Open links: SEND/RECEIVE communication supports ISO, ISO-on-TCP, TCP and UDP data exchange.
  • Controller messaging: Up to 16 S7 communication connections are documented.
  • File services: FTP client/server functions use the CP flash and RAM file systems.
  • Management: SNMP, DHCP, LLDP, DCP and web diagnostics support network commissioning and observation.

Security controls at the CP boundary

  • Firewall: Stateful inspection filters traffic crossing the configured processor interfaces.
  • VPN tunnel: IPSec supports preshared keys or X.509v3 certificates for up to 32 VPN connections.
  • Access lists: IP-based ACL functions can cover the CP and PLC routing path.
  • Service reduction: Unneeded services and communication through physical ports can be disabled.

Redundancy, time and diagnostics

  • Ring recovery: Media Redundancy Protocol is supported and the CP can act as redundancy manager.
  • Real-time switching: The integrated switch supports IRT for PROFINET IO traffic.
  • Clock path: NTP and time-synchronization forwarding align the communication station with the plant time source.
  • Maintenance view: Web-based diagnostics and I&M data expose device identity and location information.
Description
Siemens 6GK7343-1GX31-0XE0 is the SIMATIC NET CP 343-1 Advanced communications processor for linking an S7-300 CPU to Industrial Ethernet. It can operate as a PROFINET IO controller, a PROFINET IO device, or both, placing the controller at the boundary between its backplane and the plant Ethernet network.

The hardware separates one 10/100/1000 Mbit/s RJ45 interface from a two-port 10/100 Mbit/s PROFINET interface. This arrangement lets 6GK7343-1GX31-0XE0 serve an upstream Ethernet connection while the paired PROFINET ports form the real-time device network and support RT, IRT and MRP behavior.

Beyond cyclic PROFINET traffic, 6GK7343-1GX31-0XE0 handles S7 communication, ISO, TCP/IP, UDP, SEND/RECEIVE, Fetch/Write with RFC 1006, SNMP, DHCP, FTP client/server and email functions. The processor stores files in flash and RAM areas and exposes web-based diagnostics so engineering data and communication state can be inspected through the configured network path.

Security functions on 6GK7343-1GX31-0XE0 include a stateful-inspection firewall, IP-based access control and IPSec VPN support. These controls belong to the CP boundary, while unused services and physical-port communication can be disabled as part of the S7-300 cell-protection design.
Alternative Names
6GK73431GX310XE0 6GK7 343-1GX31-0XE0 6GK7343 1GX31 0XE0 Siemens 6GK73431GX310XE0 CP 343-1 Advanced SIMATIC NET CP 343-1 Advanced S7-300 Industrial Ethernet CP 343-1 Siemens CP 343-1 Advanced Communications Processor
Technical notes
Siemens 6GK7343-1GX31-0XE0 uses separate RJ45 roles for its Gigabit and two-port PROFINET interfaces. Verify the external 24 V DC supply and required STEP 7 release before loading the network configuration.
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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.
Does 6GK7343-1GX31-0XE0 replace the S7-300 CPU or extend its network access?
The 6GK7343-1GX31-0XE0 extends an existing S7-300 CPU with Industrial Ethernet and PROFINET communication; it is a communications processor, not the controller CPU.
Which 6GK7343-1GX31-0XE0 port should carry Gigabit traffic?
Use the first RJ45 interface for the documented 10/100/1000 Mbit/s link; the two-port interface on 6GK7343-1GX31-0XE0 is limited to 10/100 Mbit/s and serves PROFINET.
Can 6GK7343-1GX31-0XE0 be engineered as both a PROFINET controller and device?
Yes. 6GK7343-1GX31-0XE0 supports PROFINET IO controller and IO device roles, subject to the documented device, submodule and process-data limits.
Why does 6GK7343-1GX31-0XE0 need an external supply when it is in an S7-300 rack?
The 6GK7343-1GX31-0XE0 draws logic power from the 5 V backplane and also requires an external 24 V DC connection for its communications hardware.
What software baseline is needed to configure 6GK7343-1GX31-0XE0?
Configure 6GK7343-1GX31-0XE0 with STEP 7 V5.5 SP2 HF1 or higher, or STEP 7 Professional V12 or higher; PROFINET CBA additionally requires the stated SIMATIC iMap release.
How should the security functions of 6GK7343-1GX31-0XE0 be incorporated into a cell design?
Treat the 6GK7343-1GX31-0XE0 stateful firewall, IP ACLs, IPSec VPN and service-disable controls as part of the documented network boundary, then align them with the plant security architecture.

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