Siemens 443‑1EX20‑0XE0 Communication Processor Unit

Module Feature

443‑1EX20‑0XE0 is Siemens CP443‑1 communication processor for S7‑400 PLC rack. Equipped with dual RJ45 10/100Mbps Ethernet port, supports S7 communication, TCP/IP, UDP and PROFINET IO controller function. It realizes PLC‑to‑PLC, HMI and upper computer data exchange, used for industrial automation control system.

Working principle

The module inserts into S7‑400 backplane bus, exchanges data with CPU via rack backplane. It converts internal bus data into Ethernet protocol frames, transmits and receives data through RJ45 ports to complete network‑based data interaction.

Onboard components

Communication processing circuit, backplane bus interface, dual RJ45 Ethernet ports, status LED indicators, metal housing.

LED indicators

LED indicators show power status, link and network communication activity.

Hardware self‑diagnosis

Read module diagnostic information via STEP7, monitor link status, detect communication error and hardware fault codes.

Programming software

Configure parameters by Siemens STEP7 software, set IP address and communication protocol.

Electrical & Process Parameters

Model:443‑1EX20‑0XE0 Brand:Siemens Device type:Ethernet Communication Processor Interface:2×RJ45 10/100Mbps Applicable PLC:S7‑400 Function:Industrial Ethernet data communication for S7‑400 system

Mechanical & Structure

Mounting:S7‑400 rack slot mounting Protection class:IP20 Housing:Metal/plastic modular housing

Environmental

Operating temperature:0℃ ~ +60℃ Storage temperature:‑40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE industrial standard compliant Status: Siemens S7‑400 series communication processor

Installation

Insert module into S7‑400 rack slot, fasten locking mechanism. Connect Ethernet cable to RJ45 port. Complete hardware configuration and IP setting in STEP7, download configuration to PLC.

Interface

S7‑400 backplane bus interface, dual RJ45 Ethernet ports.

Diagnostic

No network link: cable fault or port damage. Communication interrupt: wrong IP configuration or bus fault. Module fault: read diagnostic buffer via STEP7 for error code.

Product Brief

Siemens 443‑1EX20‑0XE0 CP443‑1 communication processor, provides industrial Ethernet network function for SIMATIC S7‑400 PLC system.