Siemens 6GK7343-1GX21-0XE0 CP 343-1 Advanced

The Siemens 6GK7343-1GX21-0XE0 CP 343-1 Advanced communications processor connects SIMATIC S7-300 PLCs to Industrial Ethernet networks with enhanced security features. This module supports PROFINET IO controller and device functionality for flexible network architectures. It provides integrated firewall and VPN capabilities to protect industrial communication. The processor offloads communication tasks from the CPU, improving overall system performance.

Technical Specifications of Siemens 6GK7343-1GX21-0XE0

The Siemens 6GK7343-1GX21-0XE0 communications processor features a single RJ45 Ethernet port with auto-sensing 10/100 Mbps transmission. It includes 8 MB of flash memory and 16 MB of SDRAM for data buffering. The module supports up to 32 simultaneous TCP/IP connections. It operates with a current consumption of 220 mA from the 5 V DC backplane. The processor offers PG/OP communication and S7 communication for comprehensive connectivity. It also supports the NTP protocol for time synchronization across the network.

Parameter	Specification
Model Number	Siemens 6GK7343-1GX21-0XE0
Product Type	CP 343-1 Advanced Communications Processor
Product Family	SIMATIC NET
Network Interface	1 x RJ45 Ethernet
Transmission Speed	10/100 Mbps
Flash Memory	8 MB
SDRAM	16 MB
Protocols	PROFINET IO, TCP/IP, UDP, ISO-on-TCP
Security	Firewall, VPN
Connections	Up to 32 simultaneous
Current Consumption	220 mA from 5 V DC
Power Loss	4.5 W typical
Dimensions (W x H x D)	40 mm x 125 mm x 120 mm
Weight	Approx. 0.26 kg

Integration and Application

The Siemens 6GK7343-1GX21-0XE0 mounts on the S7-300 DIN rail and connects via the backplane bus. This processor supports PROFINET IO with RT and IRT communication. Its integrated security features protect against unauthorized network access. You can deploy this module for connecting S7-300 systems to enterprise networks, SCADA systems, and other Ethernet devices.