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SIEMENS SIMATIC S7-300 6GK7343-1EX30-0XE0 CP 343-1 Communications Processor | Original New

SIEMENS SIMATIC S7-300 6GK7343-1EX30-0XE0 CP 343-1 Communications Processor | Original New

SIEMENS · SIMATIC S7-300 · CP 343-1

6GK7343-1EX30-0XE0

Industrial Ethernet Communications Processor

Network: 2 × RJ45, 10/100 Mbit/s · Roles: PROFINET IO Controller / Device · Protection: IP20

Order check: Confirm the exact article number, host CPU/rack and project requirements before quotation.
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Overview
Applications
Technical Data
Interfaces
Environment
Setup Check
Availability
FAQ
Related Models
Recommended Products

OFFICIAL PRODUCT OVERVIEW

CP 343-1 for SIMATIC S7-300 Industrial Ethernet

Article 6GK7343-1EX30-0XE0 is a Siemens CP 343-1 communications processor for connecting SIMATIC S7-300 to Industrial Ethernet through ISO and TCP/IP. Siemens specifies PROFINET IO Controller or PROFINET IO Device operation, S7 communication, open communication and an integrated ERTEC 200 two-port switch.

Lifecycle note: Siemens lists this article as a spare part with product phase-out announced. Confirm current procurement status and exact replacement planning before quotation.

Applications

NETWORK ROLE

Industrial Ethernet connection for S7-300

Connects a SIMATIC S7-300 station to Industrial Ethernet.
Supports operation as a PROFINET IO Controller or PROFINET IO Device.
Provides S7 communication and open communication using SEND/RECEIVE services.
Supports ISO, TCP/IP, RFC1006, multicast and DHCP functions stated by Siemens.
Provides CPU time synchronization and LAN-based initialization.

Technical Data

SIEMENS DATA SHEET

Key technical values

Product type	CP 343-1 communications processor
Ethernet ports	2 × RJ45, 10 to 100 Mbit/s
Supply	24 V DC external; 5 V DC from backplane bus
Power loss	5.8 W
Module size	40 × 125 × 120 mm (W × H × D)
Net weight	0.22 kg

Interfaces

CONNECTION MAP

Front-access Ethernet and power connections

The front panel covers two 8-pin RJ45 jacks for the PROFINET interface. A separate front socket accepts the 24 V DC supply. The module also provides status LEDs, a ground-connection slider and printed MAC-address / firmware identification beneath the front panel.

Integrated switch: ERTEC 200 two-port switch · Power connection: 2-pole plug-in terminal block

Environment

OPERATING LIMITS

Environment and protection

Vertical installation	0 to 40 °C during operation
Horizontal rail	0 to 60 °C during operation
Storage / transport	-40 to +70 °C
Humidity	Up to 95% at 25 °C, non-condensing
Protection	IP20

Setup Check

INSTALLATION PATH

Single-width S7-300 rail module

Confirm that the host station and project support article 6GK7343-1EX30-0XE0.
Mount the single-width module on the S7-300 rail and connect the backplane bus.
Connect the rated 24 V DC external supply using the specified plug-in terminal.
Connect one or both RJ45 network ports and complete grounding according to the equipment manual.
Assign network parameters and initialize through LAN using the Siemens engineering workflow.

Firmware, hardware version and STEP 7 project compatibility are subject to verification for the installed system.

BEFORE ORDER

Verification checklist

Exact MLFB: 6GK7343-1EX30-0XE0	Host CPU and rack type
Required PROFINET role	STEP 7 project and firmware
24 V DC supply and grounding	Current unit photos and nameplate

Send the installed CPU model, rack position, network role and project version for a compatibility review before purchase.

Availability

WRITTEN CONFIRMATION

Commercial information before payment

Stock status	Confirm before quotation for the exact article number.
Condition	New, used or refurbished status is stated in the written quotation.
Photos / nameplate	Current unit and nameplate photos are available on request.
Test statement	Available on request and subject to the agreed test scope.
Warranty	Confirmed in the formal quotation.
Dispatch	Confirmed after stock, destination and order approval are verified.
Payment	Supported methods are listed in the formal quotation.
Quote response	Subject to verification and request completeness.
Transaction trust	Seller details, quotation, invoice and payment instructions are available for review before payment.

FAQ

COMMON QUESTIONS

Compatibility and quotation

Is this exact article available?
Availability is confirmed before quotation for 6GK7343-1EX30-0XE0 and the requested quantity.

Can I receive current photos and a test statement?
Yes, both are available on request and remain subject to the quoted unit and agreed test scope.

What should I send for a compatibility check?
Provide the exact article number, host CPU/rack, network role, firmware or project version, quantity and destination.

Related Models

RELATED SIEMENS COMMUNICATION PROCESSORS

Recommended Models

Review the exact communication role, host system and firmware requirements before selecting an alternative article number.

6GK7343-1CX10-0XE0	6GK7343-1GX30-0XE0
6GK7343-1GX31-0XE0	6GK7343-1EX00-0XE0
6GK7343-1EX10-0XE0	6GK7343-1EX11-0XE0
6GK7343-1EX20-0XE0	6GK7343-1EX21-0XE0
6GK7343-1BA00-0XE0	6GK7343-1GX20-0XE0
6GK7343-1CX00-0XE0	6GK7343-1HX00-0XE0