Siemens SIMATIC NET CP 343-1 Communications Processor

Description

The Siemens CP 343-1, with order number 6GK7343-1EX30-0XE0, is an Industrial Ethernet communications processor designed for the SIMATIC S7-300 PLC series. It facilitates seamless integration of the S7-300 controller into 10/100 Mbit/s Ethernet networks. The module supports a variety of protocols including ISO, TCP/IP, UDP, and PROFINET IO (as an IO Device), making it a versatile solution for data exchange between PLCs, HMIs, and higher-level systems.

Specifications

• Manufacturer: Siemens
• Product Line: SIMATIC NET
• Model: CP 343-1
• Order Number (MLFB): 6GK7343-1EX30-0XE0
• Power Supply: 24V DC
• Current Consumption: 0.2A
• Interface: 1x RJ45 for Industrial Ethernet
• Transmission Rate: 10/100 Mbit/s
• Supported Protocols: TCP/IP, UDP, ISO, S7 Communication, PROFINET IO Device

Label Info

• Input: DC 24V, 0.2A
• MAC Address: 20-87-56-01-42-17
• Certifications: CE, UL, FM, ATEX, IECEx

Application

This module is ideal for applications requiring communication between S7-300 controllers and other devices over an Ethernet network. Common uses include machine-to-machine (M2M) communication, data acquisition (SCADA), and connecting to visualization systems (HMI). Its PROFINET IO Device capability allows it to be integrated into modern PROFINET networks controlled by an IO Controller.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned module, you are contributing to the circular economy and helping to avoid approximately 12.0 kg of CO2 emissions that would be generated from manufacturing a new unit. This saving is comparable to the emissions from a 60 km car journey.

Availability

This is an obsolete item, but it is available from stock as a tested, refurbished part to extend the life of your existing S7-300 systems. Order now from PLC2Day for expert support and fast delivery.

FAQ

The primary difference lies in the supported features. The Advanced version (GX31) offers additional functionalities like IT-functions (email, FTP client/server, web server), PROFINET IO Controller capabilities, and enhanced security features which are not present in this standard EX30 model. The EX30 model primarily functions as a PROFINET IO Device.

Yes, the CP 343-1 (6GK7343-1EX30-0XE0) can be configured using both the classic SIMATIC Manager (STEP 7 V5.5 or higher) and the modern TIA Portal (e.g., V13 or higher). However, full functionality and diagnostics are best accessed within the environment it was designed for, the S7-300 system architecture.

No, this specific model, the standard CP 343-1 (6GK7343-1EX30-0XE0), does not natively support ring redundancy protocols like MRP. For such features, you would need to look at more advanced communication processors, such as the CP 343-1 Advanced (GX31) or modules within the newer S7-1500 series.

Last Update: Friday, March 13, 2026

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