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Siemens CP343-1LEAN Industrial Ethernet Processor for S7-300

Siemens CP343-1LEAN Industrial Ethernet Communication Processor

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ManufacturerSiemens

Part numberCP343-1LEAN

Interface Industrial Ethernet (2x RJ45)

Speed 10/100 Mbit/s

Protocols TCP/IP, UDP, ISO-on-TCP, PROFINET IO

Power Supply 24V DC

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Connects S7-300 to Industrial Ethernet Two RJ45 ports with autosensing Supports PROFINET IO Relieves CPU of communication tasks Easy DIN rail installation Media Redundancy (MRP) support

Product description

The Siemens CP343-1LEAN is a communications processor designed to connect SIMATIC S7-300 automation systems to Industrial Ethernet networks. It features two RJ45 sockets for 10/100 Mbit/s Ethernet connectivity with autosensing and autocrossover functionality. This module relieves the CPU of communication tasks, allowing for expanded network capabilities.

This processor supports various communication services including Open communication (TCP/IP, UDP), PG/OP communication, S7 communication (server only), and PROFINET IO device functionality. It is ideal for industrial automation applications requiring reliable and efficient data exchange, such as connecting to SCADA systems, other controllers, or higher-level networks.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens CP343-1LEAN. We provide quality components and dedicated support to help you enhance your industrial network infrastructure.

Technical specifications

Interface	Industrial Ethernet (2x RJ45)
Speed	10/100 Mbit/s
Protocols	TCP/IP, UDP, ISO-on-TCP, PROFINET IO
Power Supply	24V DC
Mounting	DIN rail snap-mount

Common applications

Industrial Ethernet networks

SCADA systems

PLC communication

Factory automation

Data acquisition

Network integration

Compatible systems

SIMATIC S7-300 STEP 7 V5.4+ TIA Portal V11+

Also known as

Siemens 6GK7343-1CX10-0XE0 SIMATIC CP 343-1 Lean

Replaces / compatible with

Replaces or expands communication capabilities for existing S7-300 systems requiring Industrial Ethernet connectivity.

Technical note

Expert tip

Configuration of the CP343-1LEAN requires STEP 7 V5.4 or higher, or TIA Portal V11 or higher.

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Frequently asked questions

What communication protocols does the Siemens CP343-1LEAN support?

The Siemens CP343-1LEAN supports Open communication (TCP/IP, UDP), PG/OP communication, S7 communication (server only), and PROFINET IO. It also supports ISO-on-TCP.