BMXNOC0401 | Schneider 4-Port Ethernet Module for M340

Why the BMXNOC0401 Belongs in Your M340 Upgrade Plan

Engineers modernizing legacy control systems often face a critical gap: the existing PLC platform works, but its communication layer cannot keep pace with plant-floor data demands. The BMXNOC0401 from Schneider Electric solves this problem directly. As a dedicated Ethernet TCP/IP network module for the Modicon M340 automation platform, it adds four RJ45 ports, dual-protocol support, and an embedded switch to your existing rack. This module transforms a standard M340 into a transparent-ready node capable of handling both EtherNet/IP and Modbus/TCP traffic. For facilities planning a phased upgrade rather than a full rip-and-replace, this is a practical, cost-effective step.

What the BMXNOC0401 Actually Delivers

The module integrates a 4-port managed switch, which eliminates the need for external network hardware in many topologies. Each port supports 10BASE-T/100BASE-TX at 10/100 Mbit/s over four twisted pairs. That embedded switch also supports RSTP for network redundancy and port mirroring for diagnostics. The BMXNOC0401 communicates using both EtherNet/IP and Modbus/TCP, so it fits mixed-protocol environments without additional gateways. A standard web server is activated on the module, enabling remote monitoring and configuration through a browser. The module draws 555 mA at 3.3 V DC from the rack’s internal power supply, so no separate power wiring is required. At just 0.2 kg, it adds negligible mechanical load to the rack.

Key Specifications at a Glance

Where the BMXNOC0401 Fits in Your Architecture

This module suits plants that already run Modicon M340 racks but need better network segmentation and protocol flexibility. In a water treatment facility, for example, the BMXNOC0401 can connect a rack to both a Modbus/TCP SCADA system and an EtherNet/IP device network simultaneously. The embedded switch lets you daisy-chain several M340 racks in a line topology, reducing cabling costs. For an automotive assembly line, the RSTP support ensures that a single cable fault does not halt production. The module’s transparent-ready class B30 rating means it can handle moderate real-time traffic without additional configuration.

Installation and Setup Guidance

The BMXNOC0401 mounts directly in any free slot of a Modicon M340 rack. Because it draws power internally, you only need to connect your Ethernet cables to the four RJ45 ports. Configure the module through the M340’s programming software or via its built-in web server. Set the IP address, subnet mask, and gateway to match your network plan. For EtherNet/IP or Modbus/TCP I/O scanning, define the target devices and map their data into the PLC’s memory. The module’s LEDs give immediate feedback: green RUN, red ERR, amber ETH STS, and green/red MS and NS indicators help you verify processor, network, and module status at a glance. No special tools are required beyond a standard Ethernet cable and a PC for initial setup.

Maintenance and Reliability for Long-Term ROI

The BMXNOC0401 has no moving parts, so wear is minimal. Inspect the module periodically for dust accumulation and secure cable connections. Operate within the specified 0…60 °C range and keep humidity below 95 % without condensation. The IP20 rating means it belongs in a clean cabinet or control room, not on the plant floor. For hazardous areas, the ATEX zone 2/22 and IECEx zone 2/22 certifications allow installation in those environments when properly enclosed. Because the module supports SNMP, you can monitor its health remotely and catch network issues before they cause downtime. This proactive maintenance approach protects your upgrade investment and extends the module’s service life.

Compatibility and Integration Notes

The BMXNOC0401 works natively with Schneider Electric’s Modicon M340 platform. It also integrates with any SCADA, HMI, or DCS that supports Modbus/TCP or EtherNet/IP. The embedded switch supports RSTP, so it can join redundant ring topologies with compatible managed switches. The FDR server function lets you replace a failed module without a programming terminal, as the module can retrieve its configuration automatically. For plants running mixed Schneider and third-party equipment, this module acts as a protocol bridge without extra hardware.

Selection Checklist Before You Buy

Confirm that your M340 rack has an available slot and that your power budget accommodates the 555 mA draw at 3.3 V DC. Verify that your network infrastructure uses Cat5e or better cabling for 100 Mbit/s operation. If you need more than four ports, consider whether the embedded switch can be supplemented with an external switch. For hazardous locations, ensure your enclosure meets the ATEX zone 2/22 or IECEx zone 2/22 requirements. SpareTechPLC stocks the BMXNOC0401 and can advise on compatibility with your existing M340 configuration. Always check the current lifecycle status and availability with SpareTechPLC before ordering.

Frequently Asked Questions

Can the BMXNOC0401 work in an existing Modicon M340 rack without additional power wiring?

Yes. The module receives its power internally from the rack backplane. You only need to connect Ethernet cables to the four RJ45 ports.

Does this module support both EtherNet/IP and Modbus/TCP simultaneously?

Yes. The BMXNOC0401 includes I/O Scanner and Messaging services for both protocols. You can run them concurrently on the same module.

What is the purpose of the embedded 4-port switch?

The embedded switch lets you connect multiple Ethernet devices directly to the module. It also supports RSTP for network redundancy and port mirroring for traffic diagnostics.

Is the BMXNOC0401 suitable for hazardous areas?

It carries ATEX zone 2/22 and IECEx zone 2/22 certifications, along with Class I Division 2 rating. Proper enclosure and installation practices are required.

How do I monitor the module’s status?

The module has five LEDs: RUN, ERR, ETH STS, MS, and NS. It also supports SNMP for remote network management. You can access the built-in web server for detailed diagnostics.