6GK7343-1EX30-0XE0 Siemens CP 343-1 Communications Processor SIMATIC S7-300

6GK7343-1EX30-0XE0 Siemens CP 343-1 Communications Processor SIMATIC S7-300

1.Overview of the 6GK7343-1EX30-0XE0 Siemens

The Siemens 6GK7343-1EX30-0XE0 is a CP 343-1 Ethernet communications processor specifically designed for the SIMATIC S7-300, bringing Industry 4.0 capabilities to legacy systems. It directly connects the S7-300 to 10/100 Mbit/s Industrial Ethernet. Featuring a built-in 2-port ERTEC 200 switch, it enables linear topologies without the need for an external hub. It also supports PROFINET IO controller or device mode, ISO/TCP/UDP, S7 communication, open SEND/RECEIVE (RFC1006), Multicast, DHCP, and NTP time synchronization, enabling instantaneous data exchange between PLCs, PLCs, SCADA systems, and PLCs and MES systems. The module provides IP access control lists and Web diagnostics, balancing security and visualization. It features two RJ45 connectors on the front with green link indicators, a 5 V backplane bus power supply, an optional 24 V external redundant connection, and a wide operating temperature range of -25°C to +70°C, ensuring true plug-and-play operation.

Powerful Communication Capabilities: This communications processor supports a variety of communication services, including S7 communication (supporting client, server, and multiplexing technologies) and open communication, supporting protocols such as ISO, TCP/IP, and UDP. It supports PROFINET IO, enabling it to connect field devices as a controller or integrate into higher-level systems as an IO device. Its S7 routing functionality facilitates cross-network programming and debugging.

Highly Integrated and Flexible Configuration: The module features an integrated 2-port real-time switch with auto-negotiation and auto-crossover functions, facilitating the construction of bus-type networks without the need for additional switches. It supports MRP, enabling the creation of redundant network rings. Flexible IP address allocation options include DHCP or allocation via a programmer/user program. It supports integration into network management systems via SNMP and offers extensive Web diagnostics.

Reliability and security: The module features network-based diagnostics for quick fault location. Configurable access lists provide access protection, enhancing network security. Its compact design saves installation space and allows for fanless operation without the need for a backup battery.

2.Core Features:

Siemens 6GK7343-1EX30-0XE0
CP 343-1 Industrial Ethernet Communications Processor for SIMATIC S7-300

I. Product Positioning
Plug-and-play in the S7-300 rack, connecting PLCs to 10/100 Mbit/s Industrial Ethernet. Supporting multiple protocols including PROFINET IO (controller or device), S7, TCP/UDP, and ISO-on-TCP, it provides digitalization, remote maintenance, and cloud connectivity for legacy systems.

II. Main Technical Specifications
Order Number: 6GK7343-1EX30-0XE0
Module Type: CP 343-1 (Firmware ≥ V2.2)
Number/Specifications of Interfaces: 2 x RJ45, Built-in 2-Port ERTEC-200 Switch
Transmission Rate: 10/100 Mbps, Auto-Negotiation
Cable Type: Twisted Pair Cat-5, Maximum Length: 100 m
Protocol Support: PROFINET IO Controller & Device, S7, TCP, UDP, ISO-on-TCP, Multicast, DHCP, NTP
Open Communication: SEND/RECEIVE (RFC1006) up to 8 KiB/connection; UDP up to 2 KiB
S7 Communication: Server/Client, up to 16 Connections
PROFINET IO Controller: Up to 32 IO Devices; 1 KiB I/O Per Device; Submodule: 240 Bytes
PROFINET IO Device: Self-acting as a Device, up to 512 Byte I/O
Total connections: Up to 32 (multi-protocol parallel)
Time synchronization: NTP, SICLOCK, CPU clock forwarding
Redundancy: MRP ring client (≤ 200 ms switchover)
Security: ACL-IP, disable idle ports/services, event log
Diagnostics: Web server, SNMP v1, LLDP, PROFINET alarms
Startup/maintenance: LAN initialization, DHCP, I&M0…I&M3
Power supply: Backplane 5 V/0.2 A + external 24 V/0.16 A (typical)
Power consumption: 5.8 W
Operating temperature: 0…+60°C (horizontal installation); 0…+40°C (vertical installation)
Dimensions: 40 × 125 × 120 mm (W × H × D)
Weight: 0.3 kg
Protection class: IP20
Approvals: CE, UL, CSA, ATEX Zone 2. IECEx, RCM, UKCA, CCC, RoHS

III. Feature Highlights
Dual-port switch: Build a linear Ethernet topology without an external hub
PROFINET IO controller: Supports up to 32 remote I/O devices, with 1 KiB of data per device, meeting the needs of medium-to-large projects
PROFINET IO device: Connects the S7-300 as a high-end I/O device to an S7-1500/PLCopen controller
0-Code integration: Automatically identifies and configures with drag-and-drop support in STEP7 V6.4 SP2 or TIA Portal V11 or later
MRP ring redundancy: Switchover in ≤ 200 ms ensures uninterrupted data
IP-ACL & port disabling: Prevent unauthorized access and meet factory security regulations
Web diagnostics: View port status, packet traffic, and fault history in real time, eliminating on-site device disassembly
NTP/SICLOCK: Provides a unified clock reference for PLCs, HMIs, and SCADA systems
PROFIenergy: Automatically shuts down I/O power during idle periods, saving energy
-40 70°C Storage / 70°C Transport: Suitable for global logistics and extremely cold warehouses.

IV. Typical Application Scenarios
Upgrading existing S7-300 production lines to Ethernet for seamless integration with MES/SCADA.
Connecting ET200SP, ET200MP, and V90 PN servos via PROFINET replaces the existing DP solution.
Establishing a high-speed "controller-to-device" data channel with the S7-1500 controller enables independent replacement of process sections.
Utilizing an MRP ring network, building a low-cost redundant link without fiber.
Remote VPN Maintenance: Web diagnostics + ACL whitelisting enable on-site engineer troubleshooting.

3.Product details pictures

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