Siemens 6GK7443-1EX30-0XE0 Communications Processor

The 6GK7443-1EX30-0XE0 is a CP 443-1 Industrial Ethernet Communications Processor Di Siemens SIMATIC NET series. It is specially designed for SIMATIC S7-400 and S7-400H redundant PLC systems. This module connects PLC controllers to Industrial Ethernet and acts as a PROFINET IO Controller to realize real-time control of distributed field devices.

As the official upgraded version of the previous CP 443-1 EX20, it integrates a 2-port real-time Ethernet switch and supports bus and ring network topologies. It features Isochronous Real-Time (IRT) comunicazione, Media Redundancy, IP access control and extended diagnostics. It serves as the core communication module for Ethernet communication and PROFINET networking in medium and large automation systems. Attualmente, the entire S7-400 series has entered the end of its product lifecycle, and this model is mainly used for maintenance, expansion and fault replacement of existing systems.

Aspetto del prodotto

Scomposizione del codice modello

Full Order Number: 6GK7 443-1EX30-0XE0

6GK7: Product category prefix, representing SIMATIC NET industrial communication product series.
443: Sub-category, communications processor (CP) dedicated for S7-400 series PLC.
1: Bus type, Industrial Ethernet interface.
EX30: Specification version code, standard CP 443-1 with V3.x firmware and an integrated 2-port 100 Mbps real-time switch.
0XE0: Version identifier, standard general industrial version without custom functions.
Parametri tecnici fondamentali

3.1 Communication Interface Parameters

Articolo	Specifica
Quantità & Type of Interfaces	2 × RJ45 Industrial Ethernet ports, with built-in 2-port switch
Transmission Rate	10/100 Mbps auto-negotiation, supports auto crossover
Real-Time Performance	Supports IRT isochronous real-time communication; minimum update cycle: 250 μs
Ring Redundancy	Complies with MRP (Media Redundancy Protocol); ring network recovery time ≤ 300 SM
Port Diagnostics	Independent LINK/ACT LED indicators for each port; supports individual port disablement and manual speed/duplex configuration

3.2 Protocolli di comunicazione & Prestazione

Articolo	Specifica
PROFINET Functions	Operates as PROFINET IO Controller; connects distributed I/O, convertitori di frequenza, servo drives and other field devices
S7 Communication	Supports both Client and Server modes for PG programming, HMI monitoring and data exchange between multiple PLCs
Open Communication	Supports TCP, UDP, ISO-on-TCP (RFC1006); communicates with third-party devices via SEND/RECEIVE instructions
Routing Function	Supports S7 routing for program download and device access across different networks
Maximum Concurrent Connections	Fino a 64 communication connections
Maximum Data Size per Packet	ISO-on-TCP: 1452 bytes; S7 Communication: 8 KB

3.3 Elettrico & Parametri meccanici

Articolo	Specifica
Alimentazione elettrica	5 V DC supplied via S7-400 backplane bus; nessuna alimentazione esterna richiesta
Typical Power Consumption	ca. 7.5 W
Larghezza del modulo	40 mm (standard single-width module for S7-400)
Slot Occupation	1 slot of S7-400 rack
Metodo di montaggio	Plug into rack backplane bus and fasten with screws
Peso netto	ca. 0.45 kg
Classe di protezione	IP20

3.4 Ambientale & Certification Parameters

Articolo	Specifica
Temperatura operativa	0℃ ~ +60 ℃ (horizontal mounting); 0℃ ~ +40 ℃ (montaggio verticale)
Magazzinaggio / Transportation Temperature	-40℃ ~ +70 ℃
Installation Altitude	No derating required below 2000 M
Grado di inquinamento	Massimo. Grado di inquinamento 3
Certificazioni	CEI 61131-2, CE, UL, cULus, FM

Compatible Scope & Modelli alternativi

4.1 Compatible PLC Models

Full range of standard S7-400 CPUs (CPU firmware version ≥ V4.1; firmware upgrade required for older versions)

S7-400H fault-tolerant redundant CPUs; supports dual-CP configuration for redundant communication links

Compatible with S7-400F/FH fail-safe CPUs for safety-related communication applications

4.2 In-brand Alternative Models

Upgrade Replacements within the Same Series

Direct Upgrade: Fully replaces legacy models 6GK7443-1EX20-0XE0 and 6GK7443-1EX11-0XE0. Simply update the module model in STEP7 hardware configuration. It is backward compatible with all basic communication functions and adds new features including IRT real-time communication and MRP ring redundancy.

Higher-end Version: 6GK7443-1GX30-0XE0 (CP 443-1 Avanzato). Dotato di 1 × Gigabit Ethernet port and 4 × 100 Mbps switch ports. It supports firewall, IPsec encryption, Server Web, FTP, email and other IT functions, ideal for high-security and multi-port networking scenarios.

Migration for New Systems

Siemens next-generation platform is SIMATIC S7-1500 series, with the corresponding Ethernet module 6GK7543-1AX00-0XE0 (CP 1543-1).

> Nota: S7-1500 modules are completely incompatible with S7-400 racks and backplane buses. This is a full system migration solution and direct single-module replacement is not feasible.

4.3 Note sulla compatibilità

S7-400 systems with CPU firmware lower than V4.1 cannot operate with EX30 CP. Please upgrade CPU firmware to V4.1 or above first.

Native IT functions (FTP, Server Web, e-mail) supported by older CP models are removed in the standard EX30 version. Select GX30 Advanced version if IT functions are required.

Supporting Accessories & Expansion Components

Tipo di accessorio	Common Model	Descrizione della funzione
C-PLUG Memory Card	6GK1900-0AB00-0AA0	Stores module configuration and firmware data. Enables plug-and-play replacement without re-downloading programs
Industrial Ethernet Cable	6XV1840 series	Standard Cat5e industrial shielded cable for reliable on-site cabling
Fast Connect Plug	6GK1901-1BB10-2AA0	Tool-free RJ45 industrial plug for quick field termination
Redundancy Synchronization Kit	S7-400H supporting components	Realizes redundant communication switchover and status synchronization for dual-CP configurations

Scenari applicativi tipici
Networking for Medium & Large PLC Systems: Applied to S7-400 control systems in metallurgy, energia, petrolchimico, trattamento delle acque e altre industrie. It enables Ethernet data exchange, remote programming and debugging between PLCs, SCADA hosts, HMI panels and engineering stations.
PROFINET Distributed Control: Acts as PROFINET IO Controller to connect ET200 distributed I/O, G120 frequency converters, V90 servo drives and other field devices, building real-time Industrial Ethernet control systems.
Communication for Redundant Control Systems: Dual-CP redundant configuration in S7-400H PLC systems provides redundant communication links to ensure uninterrupted communication for high-reliability production facilities.
Data Exchange Between Multiple Systems: Implements S7 data communication among multiple S7-400 PLCs, as well as TCP/IP open communication with third-party equipment and MES systems.
Industrial Ring Networking: Leverages the built-in switch and MRP function to build bus and ring Industrial Ethernet networks, reducing the use of external switches and improving network reliability.
Troubleshooting Matrix

Fenomeno di guasto	Causa ultima	Step-by-Step Solutions
All indicators off, module fails to start after power-on	1. Module not fully inserted, poor backplane bus contact	1. Re-insert the module after power off, ensure firm connection of backplane connector and tighten screws
	2. Abnormal 5 V rack power supply or faulty power module	2. Measure 5 V backplane voltage and troubleshoot power module and rack bus faults
	3. Hardware damage of the module	3. Test with a spare module; send for repair if hardware damage is confirmed
LINK indicator off, no port connection	1. Broken cable or poorly crimped RJ45 connector	1. Replace with a spare cable and check wire sequence and crimp quality
	2. Remote device powered off or faulty port	2. Verify power supply and port status of the remote device, ensure matching speed and duplex mode
	3. Port disabled in configuration	3. Open STEP7 hardware configuration, enable the corresponding port and re-download configuration
Communication interrupted between PLC and host computer, red SF indicator steady on	1. IP address conflict or mismatched network segment	1. Scan the network via PST tool, check IP addresses and eliminate conflicts
	2. Incorrect configuration or exceeded maximum communication connections	2. Verify connection settings in hardware configuration and ensure connection quantity within limits
	3. Network loop or broadcast storm causing congestion	3. Inspect network topology, remove redundant loops and enable MRP ring management
Frequent disconnection of PROFINET IO devices	1. Poor cable shielding and severe on-site electromagnetic interference	1. Use shielded industrial cables, separate power cables from signal cables and properly ground shielding layers
	2. Excessive bus length beyond transmission limit	2. Control cable length within 100 m for 100 Mbps Cat5e cable; add repeaters for longer distance
	3. Overhigh communication load caused by too short real-time update cycle	3. Increase PROFINET update cycle appropriately to reduce communication load
MRP ring network failure, redundancy invalid	1. Broken link in the ring	1. Inspect each segment of the ring network, locate and repair faulty cables or ports
	2. Incorrect ring manager configuration	2. Check ring manager settings including priority and ring domain
	3. Topology anomaly caused by non-ring devices	3. Remove non-ring-compatible devices and ensure all ring nodes support MRP
Red BF indicator flickering, abnormal bus communication	1. Poor backplane bus contact or oxidized pins	1. Clean backplane connector pins and re-insert the module
	2. Corrupted module firmware or firmware version incompatible with CPU	2. Update firmware to compatible version via C-PLUG card, or restore factory settings and re-download configuration
	3. Defective C-PLUG card or corrupted configuration data	3. Replace C-PLUG card and rewrite configuration data

Indicator Description: SF = System Fault (Rosso), BF = Bus Fault (Rosso). Each RJ45 port is equipped with a green LINK/ACT indicator.

Comparison Table: CP443-1 EX30 vs EX20

The 6GK7443-1EX30-0XE0 is the officially designated upgraded replacement for 6GK7443-1EX20-0XE0. It adopts fully upgraded hardware architecture with enhanced protocol support and real-time performance. It is backward compatible with basic communication functions and can directly replace the old model. Please update hardware configuration in STEP7 and re-download the project after replacement.

Confronto dei parametri principali

Elemento di confronto	6GK7443-1EX20-0XE0 (Old Version)	6GK7443-1EX30-0XE0 (New Version)
Hardware Interfaces	1 × RJ45 port + 1 × AUI/ITP coaxial port, no built-in switch	2 × Industrial RJ45 ports, built-in 2-port 10/100 Mbps real-time switch, supports bus & ring topologies
Firmware Architecture	V2.x firmware	New-generation V3.x firmware
Typical Power Consumption	ca. 8.6 W	ca. 7.5 W (13% riduzione della potenza)
PROFINET Real-Time Performance	Only RT real-time communication; min. update cycle: 1 SM	Supports IRT isochronous real-time communication; min. update cycle: 250 μs, suitable for high-precision motion control
Ring Redundancy	No MRP support; external ring switch required	Native MRP Media Redundancy Protocol support; recovery time ≤ 300 SM, no extra devices needed
Maximum Connections	32 concurrent communication connections	64 concurrent communication connections (doubled capacity)
IP Access Control	Non supportato	Native Access Control List (ACL) support to restrict IP access and improve network security
Fast Startup	Non supportato	Fast Startup enabled; module initialization time reduced by 30%
PROFIenergia	Non supportato	PROFIenergy protocol supported for standby power management of field devices
Network Diagnostics	Basic port status diagnosis	Extended network diagnostics including port statistics, link quality monitoring and fault location
Clock Synchronization	Basic NTP synchronization	High-precision clock synchronization for PROFINET IRT
IT Functions (FTP/Web/Email)	Built-in basic IT functions	Standard version without embedded IT functions; select GX30 Advanced version for IT requirements
C-PLUG Memory Card	Non supportato	C-PLUG card supported for plug-and-play module replacement

Key Notes for Replacement

Configuration Modification: Dopo la sostituzione, you must change the module model to EX30 in STEP7 hardware configuration, recompile and download the project. Hot-swap without configuration update is not allowed.
CPU Firmware Compatibility: Replacing EX20 has no CPU firmware version restrictions and works with all S7-400 CPUs. Upgrading from earlier EX11/EX10 requires CPU firmware ≥ V4.1.
Interface Migration: If the old AUI/ITP coaxial interface was used, rewire to RJ45 Ethernet as the coaxial port is removed in EX30.
IT Function Migration: If the original system relies on FTP, Server Web, email alarm and other IT functions, upgrade to 6GK7443-1GX30-0XE0 (Versione avanzata) since standard EX30 does not support these features.
Redundant System Compatibility: Single-module replacement is available for S7-400H systems. Dual-CP redundant configuration is also supported with full compatibility to original redundant communication mechanism.