BMXP3420102 Schneider Modicon M340 Processor | CANopen & Modbus PLC CPU

Global PLC Spare HUB Insight

The BMXP3420102 stands as a sophisticated processing engine within the Modicon M340 automation platform. Unlike entry-level CPUs, this processor is engineered for complex control tasks, supporting up to 1024 discrete I/O in multi-rack configurations and providing specialized motion control capabilities via its integrated CANopen master bus. We recommend the BMXP3420102 for machine builders and process engineers requiring high-speed execution—boasting Boolean instruction times of just 0.12 µs—making it exceptionally responsive for high-precision independent axis control and fast periodic tasks.

Engineering Technical Specifications

• Manufacturer: Schneider Electric
• Model: BMXP3420102
• Platform: Modicon M340 Automation Series
• Capacity: 1024 Discrete I/O / 256 Analog I/O (Multi-rack).
• Integrated Ports: USB, RJ45 (Modbus), and SUB-D 9 (CANopen Master).
• Memory: 4096 kB Internal RAM (Includes 3584 kB for constants/symbols).
• Execution Speed: 0.12 µs (Boolean) / 1.16 µs (Floating point).
• Task Structure: 1 Master, 1 Fast periodic, and 64 Event-driven tasks.
• Physical: Standard 35mm DIN Rail mounting.

Diagnostic Capability & Application Utility

• Real-time CANopen Diagnostics: Integrated status LEDs (CAN RUN, CAN ERR) provide immediate visual feedback on bus health, reducing troubleshooting time in multi-device machine networks.
• Event-Driven Flexibility: Supports 64 event tasks, enabling high-speed response to critical machine interruptions without disrupting the main control scan.
• Flexible Serial Links: Native support for RS232C/RS485 in both Modbus (Master/Slave) and character modes, offering seamless integration with legacy HMI or VSD networks.
• Application Suitability: Highly effective in packaging machinery, automated conveyors, and modular process skids.

Shipping & Quality Assurance

• Global Distribution: Reliable delivery via FedEx, UPS, or DHL.
• Order Fulfillment: Fast-tracked processing within 24 to 48 hours for expedited project delivery.
• Performance Promise: Every unit is backed by a 12-month comprehensive performance warranty.
• Package Contents: 1x BMXP3420102 Processor and factory-supplied memory card (BMXRMS008MP).

Professional FAQ

Question: Can I expand the I/O capacity beyond the single-rack configuration?

Answer: Yes, the BMXP3420102 supports multi-rack architectures, allowing you to expand up to 1024 discrete I/O points across 4 racks and 11 slots.

Question: How do the event tasks impact the overall scan time of the master task?

Answer: Event tasks are executed as high-priority interruptions; ensure your event logic is streamlined to prevent "starvation" of the master cycle.

Question: Is the CANopen port isolated from the serial communication ports?

Answer: The CANopen port operates independently on its own bus; however, always verify proper grounding of your shield cabling to prevent electrical noise.

Question: What is the benefit of the supplied BMXRMS008MP memory card?

Answer: It provides secure, non-volatile backup for your programs and constants; it is essential for quick "hot-swapping" or restoring PLC state without needing a PC.

Question: If I am upgrading from a smaller M340 CPU, how do I handle the project migration?

Answer: Open your project in Control Expert, select "Change CPU," and update the target to BMXP3420102. Perform a full "Rebuild All" to verify memory allocation.

Procurement Advisory

• Memory Management: With 4096 kB of RAM, you have ample space for complex floating-point calculations, but keep an eye on your symbol table to maintain optimal scan performance.
• Serial Logic: When using the RJ45 ports for Modbus, ensure your termination resistors are correctly matched (120 Ω) for RS485 segments to avoid signal reflections.
• Task Optimization: Utilize the "Fast Task" for time-critical PID control loops and reserve the "Master Task" for generalized system monitoring.

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