SIEMENS A5E02267957 CP 343-1 – Industrial Ethernet Communication Processor | SIMATIC S7-300 Platform
Engineering Background
The SIEMENS A5E02267957 is the CP 343-1 Communication Processor module designed for the SIMATIC S7-300 programmable logic controller platform. As a dedicated Ethernet interface module, it enables seamless integration of S7-300 CPUs into Industrial Ethernet networks, supporting PROFINET IO, S7 communication, and open TCP/IP protocols. This module is a cornerstone component in distributed automation architectures across process, manufacturing, and infrastructure industries worldwide.
Product Positioning
Engineered for procurement engineers and system integrators who require a reliable, OEM-verified Ethernet communication module for SIMATIC S7-300 systems. The A5E02267957 delivers deterministic network performance, broad protocol support, and seamless compatibility with TIA Portal and STEP 7 engineering environments — making it the preferred choice for both greenfield installations and legacy system expansions.
Complete Technical Specifications
| Part Number / SKU | A5E02267957 |
| Module Type | CP 343-1 Communication Processor |
| Compatible Platform | SIMATIC S7-300 |
| Network Interface | Industrial Ethernet (10/100 Mbit/s), RJ45 |
| Supported Protocols | PROFINET IO, S7 Communication, TCP/IP, ISO-on-TCP, UDP, SNMP |
| Max. Connections | 16 simultaneous connections |
| Supply Voltage | DC 24 V (via S7-300 backplane bus) |
| Power Consumption | Approx. 2.5 W |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Degree of Protection | IP20 |
| Dimensions (W×H×D) | 40 × 125 × 120 mm |
| Weight | Approx. 200 g |
| Country of Origin | Germany |
| Certifications | CE, UL, cULus, ATEX (Zone 2) |
| Engineering Software | STEP 7 V5.x, TIA Portal V13+ |
| Firmware Update | Supported via TFTP / TIA Portal |
Proven Application Environments
- Automotive Manufacturing: Real-time Ethernet communication between S7-300 PLCs and SCADA/MES systems on assembly lines.
- Water & Wastewater Treatment: Remote monitoring and control of distributed pump stations via Industrial Ethernet.
- Oil & Gas: Integration of S7-300 controllers into plant-wide DCS networks with PROFINET IO device connectivity.
- Power Generation & Distribution: Substation automation with deterministic Ethernet communication for protection relay coordination.
- Food & Beverage: Hygienic production line control with high-availability Ethernet ring topologies (MRP).
- Building Automation: HVAC and energy management system integration via open TCP/IP protocols.
Engineering Advantages
- Dual-Protocol Flexibility: Simultaneous support for PROFINET IO controller/device and S7 communication eliminates the need for additional gateway hardware.
- Integrated Web Server: Built-in diagnostics web server enables browser-based module status monitoring without additional software.
- Media Redundancy Protocol (MRP): Supports ring topology for high-availability network architectures with sub-200ms recovery time.
- Open Communication: TCP/IP and ISO-on-TCP support enables integration with third-party SCADA, HMI, and ERP systems.
- Hot-Swap Capable: Module replacement without full system shutdown minimizes production downtime.
- TIA Portal Native: Full configuration and diagnostics support within Siemens TIA Portal engineering framework.
System Architecture & Signal Flow
The CP 343-1 (A5E02267957) is inserted into the S7-300 rack and communicates with the CPU via the internal S7-300 backplane bus. On the network side, the module connects to Industrial Ethernet switches or directly to PROFINET IO devices via its RJ45 port. The module autonomously handles all Ethernet frame processing, protocol stack management, and connection establishment — offloading communication tasks from the CPU to ensure deterministic PLC scan cycle performance.
Typical Signal Flow: S7-300 CPU ↔ Backplane Bus ↔ CP 343-1 (A5E02267957) ↔ RJ45 Ethernet Port ↔ Industrial Ethernet Switch ↔ PROFINET IO Devices / SCADA / HMI / MES
Sourcing & Quality Verification
- OEM Origin: All units sourced directly from authorized SIEMENS distribution channels or verified industrial surplus with full traceability.
- Pre-Shipment Inspection: Each module undergoes visual inspection, label verification (part number, date code, country of origin), and functional power-on testing where applicable.
- Authenticity Guarantee: Konmask.com maintains a zero-tolerance policy on counterfeit components. All SIEMENS modules are verified against OEM packaging standards and holographic labels.
- Documentation: Original SIEMENS datasheet, CE declaration of conformity, and test report available upon request.
- Warranty: 12-month warranty against manufacturing defects. DOA replacement within 30 days of receipt.
Procurement Process
- Inquiry: Submit your BOM or part number requirement to support@konmask.com or via the product page.
- Quotation: Receive a formal quotation with unit price, lead time, and availability within 24 business hours.
- Order Confirmation: Purchase order accepted via Shopify checkout, bank transfer (T/T), or PayPal for verified buyers.
- Quality Inspection: Pre-shipment inspection report issued upon request before dispatch.
- Shipping: DHL / FedEx / UPS express worldwide. EXW Xiamen or CIF destination available. Typical transit: 3–7 business days.
- After-Sales: Technical support and warranty claims handled by our engineering team within 48 hours.
Technical FAQ
Q: Is A5E02267957 compatible with STEP 7 V5.5 and TIA Portal V16?
A: Yes. The CP 343-1 is fully supported in STEP 7 V5.x (NCM S7) and TIA Portal V13 and above, including V16/V17/V18.
Q: Can this module act as both a PROFINET IO Controller and IO Device simultaneously?
A: The CP 343-1 supports PROFINET IO Controller mode. For simultaneous Controller/Device operation, please verify the specific firmware version. Contact our team for configuration guidance.
Q: What is the maximum number of PROFINET IO devices supported?
A: Up to 16 IO devices can be configured per CP 343-1 module in PROFINET IO Controller mode.
Q: Is the module available as new, refurbished, or surplus?
A: Konmask.com offers new OEM stock and certified refurbished units. Condition is clearly stated in the product listing and quotation.
Q: Can I get a test report or certificate of conformity?
A: Yes. Original SIEMENS CoC and our internal inspection report are available upon request for all orders.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
