Siemens SIMATIC NET CP 443-1 Modules: 6GK7443-1EX30-0XE0

Technical Dossier

Product Details And Specifications

Siemens SIMATIC NET CP 443-1 Series Technical Notes

The Evolution of CP 443-1 Architecture

The CP 443-1 product line was introduced alongside the S7-400 platform in the mid-1990s as a dedicated Ethernet communications coprocessor. Early variants such as the 6GK7443-1EX02-0XE0 supported ISO transport and TCP/IP over 10 Mbit/s Ethernet using AUI or BNC interfaces, reflecting the dominant network topologies of that era. As Industrial Ethernet matured, Siemens released successive hardware revisions incorporating 100 Mbit/s Fast Ethernet (RJ45), expanded connection table capacity, and support for S7 communication, FETCH/WRITE, and UDP protocols.

The introduction of PROFINET IO controller functionality marked the most significant architectural shift in the series. Modules from the EX30 generation onward — including the 6GK7443-1EX30-0XE0 — integrate a PROFINET IO controller stack capable of managing distributed I/O devices (ET 200 series, third-party PROFINET devices) directly from the communications processor, independent of the S7-400 CPU's DP master interface. This architecture supports IRT (Isochronous Real-Time) and RT (Real-Time) PROFINET classes, enabling motion-critical and process-critical applications within a single module.

Compatibility constraints are a key operational consideration: CP 443-1 modules are exclusively compatible with the S7-400 backplane bus and cannot be used in S7-300, S7-1500, or ET 200 racks. Firmware versions must be matched to STEP 7 Classic (v5.x) or TIA Portal project versions. Modules from different hardware revisions (e.g., EX02 vs. EX30) are not interchangeable without project re-engineering due to differences in connection resource allocation and PROFINET stack implementation.

CP 443-1 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified CP 443-1 product range. Models are classified by primary function:

PROFINET IO Controller / Industrial Ethernet (Current Generation)

• 6GK7443-1EX30-0XE0: CP 443-1 EX30; PROFINET IO controller; 100 Mbit/s; 2-port switch; IRT support; S7 comm
• 6GK7443-1EX11-0XE0: CP 443-1 EX11; Industrial Ethernet; 100 Mbit/s; TCP/IP, ISO, S7 comm; no PROFINET IO
• 6GK7443-1EX20-0XE0: CP 443-1 EX20; PROFINET IO controller; 100 Mbit/s; RT class; predecessor to EX30
• 6GK7443-1EX40-0XE0: CP 443-1 EX40; PROFINET IO controller; enhanced port count; gigabit-ready interface
• 6GK7443-1EX41-0XE0: CP 443-1 EX41; PROFINET IO controller; 1 Gbit/s; IRT; expanded IO device capacity

Standard Industrial Ethernet (Legacy / Maintenance)

• 6GK7443-1EX02-0XE0: CP 443-1 EX02; 10/100 Mbit/s; TCP/IP, ISO, UDP; no PROFINET IO; AUI/RJ45
• 6GK7443-1EX05-0XE0: CP 443-1 EX05; 100 Mbit/s; TCP/IP; S7 routing; FETCH/WRITE server
• 6GK7443-1EX06-0XE0: CP 443-1 EX06; 100 Mbit/s; expanded connection resources vs EX05
• 6GK7443-1EX07-0XE0: CP 443-1 EX07; 100 Mbit/s; IT functions; FTP client/server; HTTP; email
• 6GK7443-1EX08-0XE0: CP 443-1 EX08; 100 Mbit/s; IT functions; enhanced security; VPN/firewall capable

Advanced IT / Security Variants

• 6GK7443-1GX20-0XE0: CP 443-1 Advanced; PROFINET IO; IT security; VPN; firewall; HTTPS; FTPS
• 6GK7443-1GX30-0XE0: CP 443-1 Advanced EX30; PROFINET IO controller; integrated security functions; SNMPv3
• 6GK7443-1GX11-0XE0: CP 443-1 Advanced EX11; Industrial Ethernet; VPN tunnel; stateful packet inspection

OPC / Special Function Variants

• 6GK7443-1EX30-0XB0: CP 443-1 EX30 (SIPLUS variant); extended temperature range; conformal coating; -25 to +60°C
• 6GK7443-1EX11-0XB0: CP 443-1 EX11 SIPLUS; harsh environment; conformal coating; extended temp
• 6GK7443-1EX40-0XB0: CP 443-1 EX40 SIPLUS; extended temp; PROFINET IO; industrial harsh-duty rating

Sourcing Hard-to-Find & Obsolete CP 443-1 Parts

The CP 443-1 series has entered the mature-to-declining phase of its product lifecycle. Siemens has announced migration pathways toward the S7-1500 platform with CP 1543-1 and CP 1545-1 communications processors. However, the installed base of S7-400 systems in process industries — where plant lifecycles routinely exceed 20–30 years — creates sustained demand for CP 443-1 spare parts well beyond Siemens' standard product support windows.

DriveKNMS maintains a dedicated inventory of CP 443-1 modules across multiple hardware revisions, including discontinued variants such as the EX02, EX05, EX06, and EX07 generations. Sourcing channels include decommissioned plant equipment, certified refurbishment programs, and direct manufacturer surplus. All units are catalogued by hardware revision (HW) and firmware version (FW) to ensure compatibility with the customer's existing STEP 7 or TIA Portal project configuration.

Quality Control for the CP 443-1 Range

CP 443-1 modules present specific test challenges due to their integrated Ethernet switch fabric, PROFINET IO stack, and S7-400 backplane bus interface. DriveKNMS applies a structured test protocol to all CP 443-1 units prior to dispatch:

• Backplane bus integrity test: Module is seated in a reference S7-400 rack and powered via PS 407 or PS 405 power supply. Backplane communication is verified via STEP 7 hardware configuration and online diagnostics.
• Ethernet port functional test: Each RJ45 port is tested for 10/100/1000 Mbit/s autonegotiation, link establishment, and frame transmission using a calibrated Ethernet test set.
• PROFINET IO controller test: For EX20/EX30/EX40/EX41 variants, the module is configured as a PROFINET IO controller and connected to a reference ET 200S or ET 200SP device. IO cycle, alarm handling, and device replacement without PG (DCP) are verified.
• S7 communication test: S7 PUT/GET operations are executed between the CP under test and a reference S7-400 CPU to confirm connection establishment and data integrity.
• Firmware version verification: Firmware version is read via STEP 7 online view and documented on the test certificate accompanying each unit.
• Visual and mechanical inspection: Connector pins, front panel LEDs, and housing integrity are inspected. SIPLUS variants are additionally checked for conformal coating condition.