• Product type: Communication processor (CP)
• Manufacturer: Siemens
• Product family: SIMATIC NET
• Model designation: CP 343-1
• Article number: 6GK7343-1EX11-0XE0
• Primary function:

Connects SIMATIC S7-300 PLC to Industrial Ethernet networks

Enables PLC communication with SCADA, HMI, and other PLCs

• Communication protocols:

TCP/IP

ISO-on-TCP (RFC1006)

UDP

S7 communication

Fetch/Write and Send/Receive services

• Transmission rate:

10/100 Mbit/s Ethernet (auto-sensing)

• Interface ports:

1 × Industrial Ethernet (RJ45 / AUI depending on version)

• Number of connections:

Up to 16 communication connections

• Supply voltage:

5 V DC (via rack)

24 V DC (external support)

• Power consumption:

Approx. 10 W

• Mounting type:

Plug-in module for S7-300 rack

• Diagnostics:

Built-in communication diagnostics

LAN initialization support

• Protection class: IP20
• Operating temperature:

Typically 0 °C to +60 °C (industrial use)

• Dimensions (W × H × D):

Approx. 125 × 80 × 120 mm

• Weight:

Approx. 0.45–0.6 kg

• Typical applications:

Industrial Ethernet networking

PLC-to-PLC communication

SCADA integration

Remote programming and diagnostics

1. Datasheet