6GK7343-1EX30-0XE0 – CP 343-1 Communications Processor

For SIMATIC S7-300 · Industrial Ethernet · 2-port switch · PN IO controller/device

 Product Overview

• CP 343-1 (order no. 6GK7343-1EX30-0XE0) – high‑performance communication module for S7‑300.
• Connects to Industrial Ethernet via ISO, TCP/IP and supports PROFINET IO controller or device.
• Integrated 2‑port switch (ERTEC 200) – enables line / star topologies without external switches.
• Supports S7 communication, fetch/write, send/receive (RFC1006), multicast, DHCP, and NTP.
• Web‑based diagnostics, MIB, SNMP v1, DCP, LLDP – easy network integration.

 Core Technical Specifications

• Transfer rate: 10 / 100 Mbit/s (auto‑negotiation) on both RJ45 ports.
• Supply voltage: 24 V DC (external) + 5 V from backplane bus.
• Power loss: typ. 5.8 W – current consumption: 0.2 A (5 V) + 0.2 A (24 V).
• Open communication: up to 16 connections, 8 KB user data per ISO/TCP, 2 KB for UDP.
• S7 communication: max. 16 simultaneous connections.
• PROFINET IO controller: up to 32 devices, 1 KB input/output data per device.
• PROFINET IO device: max. 512 bytes input/output, 32 submodules.
• Ring redundancy (MRP) supported – robust network design.
• Security: ACL (IP‑based), disable unused services, block physical ports.

 Environmental & Installation

• Operating temperature: 0 … 60 °C (horizontal) / 0 … 40 °C (vertical).
• Storage / transport: -40 … 70 °C – relative humidity up to 95 % (non‑condensing).
• IP20 protection – compact S7‑300 single‑width format (40×125×120 mm, ~0.22 kg).
• Mounting on S7‑300 rail – front connector not required (RJ45 + terminal block).

 Compatibility & Typical Applications

• Perfect for: S7‑300 based machine control, conveyor systems, and distributed I/O via PROFINET.
• Acts as PROFINET IO controller for up to 32 devices – or as IO device for higher‑level controllers.
• Supports multiprotocol mode – 32 active connections across S7, open IE, and PN.
• Integrates with STEP 7 V5.4 SP2+ or TIA Portal V11+ – I&M data (I&M0, I&M1).
• Time synchronization via NTP and SICLOCK – essential for coordinated automation.

 Expert FAQ – CP 343‑1

• Q1: Can I use this CP as a PROFINET IO controller with S7‑300?
  Yes – it supports up to 32 PN IO devices. Use it as a controller for distributed I/O (ET 200, etc.) or as a device for higher‑level PLCs.
• Q2: Does the integrated switch support MRP (Media Redundancy)?
  Yes – MRP is supported. This allows ring topologies with fast re‑configuration for high availability.
• Q3: What is the maximum data size for SEND/RECEIVE blocks?
  8 KB for ISO, ISO‑on‑TCP, and TCP connections; 2 KB for UDP. Sufficient for most machine‑level data exchange.
• Q4: How do I secure the CP against unauthorized access?
  Use IP‑based ACL, disable unnecessary services (e.g., HTTP, SNMP), and block physical ports if needed.
• Q5: Can I use this CP in a multi‑protocol environment?
  Yes – multi‑protocol mode supports up to 32 active connections across S7, open IE, and PROFINET simultaneously.

 Oiltech Controls’s Insight

• The CP 343‑1 (6GK7343-1EX30) is a reliable workhorse for S7‑300 Ethernet connectivity. Its 2‑port switch simplifies wiring and reduces hardware costs.
• For new projects, we recommend using it as a PROFINET IO controller – the 32‑device capacity handles most medium‑sized machines.
• If you need MRP redundancy, this module is a cost‑effective choice compared to external managed switches.

 Delivery, Warranty & Support

• Warranty: 12‑month comprehensive warranty.
• Shipping: FedEx, UPS, DHL – 24‑28 hours dispatch.
• Global express delivery with full tracking.

 Why Oiltech Controls?

• 15+ years in industrial automation spares – deep technical knowledge.
• Global shipping with FedEx, UPS, DHL – fast and reliable.
• Tested surplus / refurbished options – quality assured.
• 12‑month warranty and technical verification prior to dispatch.
• Expert support for obsolete control systems and legacy PLCs.

– CP 343‑1 · 6GK7343-1EX30-0XE0 –