Schneider BMXP3420302H Modicon M340 Processor Module for Severe Environments

Product Overview

When harsh environmental conditions threaten the reliability of your control system, the Schneider BMXP3420302H processor module delivers robust performance. Part of the Modicon M340 automation platform, this module is specifically designed for severe environments, featuring conformal coating and an IP20 degree of protection. It handles up to 1024 discrete I/O in a multi-rack configuration or 704 I/O in a single-rack setup, along with 256 analog I/O (multi-rack) or 66 analog I/O (single-rack). The module includes a supplied memory card (BMXRMS008MP) for backup of programs, constants, symbols, and data, and it activates a standard web server (class B10).

Technical Specifications Breakdown

The BMXP3420302H integrates multiple communication interfaces: a USB port (12 Mbit/s), a CANopen master bus (SUB-D 9, 20 kbit/s to 1 Mbit/s), and an Ethernet TCP/IP port (RJ45, 10/100 Mbit/s). It supports up to 63 CANopen server devices and offers flexible transmission rates with distances up to 2500 m at 20 kbit/s. Internal memory includes 4096 kB RAM total, with 256 kB for data and 3584 kB for program constants and symbols. Execution times are fast: 0.12 µs for Boolean instructions, 0.25 µs for single-length words, and 1.16 µs for floating points. The module consumes 135 mA at 24 V DC and receives power via the rack. It operates in ambient temperatures from -13 to 158 °F (-25 to 70 °C) and withstands humidity from 10 to 95% without condensation.

Industry Applications

This processor excels in applications where dust, gas, salt, and mold are present. It is certified for hazardous locations (Class I Division 2) and meets ATEX zone 2/22 and IECEx zone 2/22 standards. Use it in oil and gas facilities, chemical plants, or offshore platforms where standard controllers fail. The BMXP3420302H supports up to 4 racks and 11 slots, making it suitable for medium-sized distributed control systems. Its CANopen motion control capability enables precise coordination of independent axes, while Ethernet TCP/IP with Modbus TCP messaging ensures seamless integration into existing networks.

Installation & Setup Guidance

Mount the BMXP3420302H on a Modicon M340 rack and connect the internal power supply via the rack bus. Use the USB port for local programming or the Ethernet port for network access. For CANopen, use a SUB-D 9 connector with two twisted shielded pairs, respecting maximum cable lengths per baud rate (e.g., 2500 m at 20 kbit/s). The module supports daisy-chaining or tap junctions with CSMA/CA access. Ensure proper grounding and follow EN/IEC 61131-2 guidelines. The supplied memory card must be inserted for program backup and web server activation.

Maintenance & Reliability

Regularly inspect the module for dust accumulation on the IP20 enclosure and verify LED status indicators: RUN (green), ERR (red), and I/O (red). The conformal coating protects against corrosive gases (class Gx per ISA S71.04) and salt exposure (level 2 per IEC 68252). In severe environments, check the memory card (CARD ERR LED) and CANopen bus (CAN RUN/CAN ERR LEDs) periodically. The module's wide operating temperature range (-13 to 158 °F) reduces thermal stress failures. For safety-rated equipment, always follow the manufacturer's safety manual during inspection.

Compatibility & Integration

The BMXP3420302H integrates seamlessly with Modicon M340 racks and I/O modules. It supports up to 2 Ethernet communication modules and 4 AS-Interface modules. Embedded services include CANopen network management (NMT), Process Data Objects (PDO), Service Data Objects (SDO), and special functions (SYNC, EMCY, TIME). On Ethernet, it offers bandwidth management, data editor, Modbus TCP messaging, rack viewer, and SNMP network administration. The module is compatible with CANopen M20 DS 301 V4.02, DS 303-2, and DS 405 devices.

Buying Guide & Purchasing Advice

Before purchasing the BMXP3420302H, verify your rack compatibility and required I/O count. Confirm that your application demands severe environment protection (conformal coating, gas/dust resistance). The module ships with a memory card (BMXRMS008MP) included. For current lifecycle status and availability, contact BluePLC Industrial. We stock this processor and can advise on replacement options if needed. Ensure your system meets the 24 V DC supply requirement (135 mA) and that you have appropriate CANopen and Ethernet cabling.