Case Study: When a Legacy M580 Rack Needed Modern Ethernet
A food processing plant in the Midwest ran a Modicon M580 rack with an aging communication module that could not handle the network load from new vision inspection cameras. The line stalled every time the plant network experienced a broadcast storm. The maintenance team needed a drop-in module that supported RSTP and port mirroring without replacing the entire rack. They chose the BMENOC0301C from Schneider Electric. Within one shift, the module restored deterministic Ethernet communication and eliminated unplanned downtime.
What Is the BMENOC0301C?
The BMENOC0301C is a communication module for the Modicon M580 range. It installs directly into an Ethernet + X-bus rack, such as the BMEXBP series. This module provides three Ethernet RJ45 ports, each rated for 10/100 Mbit/s with double shielded twisted pair cabling. It draws internal power from the rack, so you do not need a separate power supply. The module supports up to four modules per rack, making it ideal for distributed control architectures.
Key Technical Specifications That Matter
Triple Ethernet Ports with Embedded Switch
Three RJ45 ports let you daisy-chain devices or create a redundant ring. The embedded multiport switch reduces wiring and eliminates the need for external switches. Each port supports 10/100 Mbit/s, which is sufficient for Modbus TCP and EtherNet/IP I/O scanning.
Advanced Communication Services
The module includes an FDR server, SNMP network administrator, and web server (basic). RSTP support ensures fast network recovery after a cable break. Port mirroring helps you troubleshoot traffic without disrupting production. These features come standard, not as add-ons.
Rugged Environmental Protection
With an IP20 rating and conformal coating, the BMENOC0301C resists dust, gas, and salt. It operates from 32 to 140 °F (0 to 60 °C). Certifications include CE, UL, CSA, RCM, EAC, and ATEX zone 2/22. The module meets IEC 61131-2 and IEC 61010-2-201 standards.
Compact Footprint
The module measures 1.3 in wide, 4.08 in high, and 3.4 in long. It weighs only 0.4 lb (0.2 kg). This small size saves panel space and simplifies installation in dense racks.
Upgrade Path from Legacy Modules
If you run an older M580 rack with a first-generation Ethernet module, the BMENOC0301C offers a clear upgrade. It uses the same rack power and backplane connection. For product versions below 13, current consumption is 1800 mA at 3.3 V DC. For versions 13 and above, it drops to 900 mA. This lower current draw reduces heat and extends rack power supply life. The module supports the same Modbus TCP and EtherNet/IP protocols, so your existing PLC logic remains unchanged.
Installation and Setup
Mount the module in any available slot on a BMEXBP rack. Connect your Ethernet cables to the three RJ45 ports. The module draws power from the rack backplane. Use the front-panel LEDs to verify status: green RUN, red ERR, and green/red ETH MS and Eth NS indicators. No external power wiring is required. For network configuration, access the basic web server through any port.
Maintenance and Reliability
Inspect the module every six months for dust accumulation on the RJ45 ports. Clean with dry compressed air only. Check that the conformal coating remains intact. The IP20 rating protects against solid objects, but not liquids. Keep the rack environment within 0 to 60 °C. The module’s gas and dust resistance classes (Gx, 3C4, 3S4) make it suitable for harsh plants. Because it has no moving parts, the BMENOC0301C typically lasts the life of the rack. That reliability lowers your total cost of ownership.
Compatibility and Integration
The BMENOC0301C works with Modicon M580 processors and BMEXBP racks. It supports Modbus TCP I/O Scanner and Messaging, plus EtherNet/IP I/O Scanner and Messaging. You can integrate it with SCADA, HMI, and historian systems via SNMP or the web server. RSTP allows ring topologies with other managed switches. The module also supports FDR server for fast device replacement.
Selection Guide
Before ordering, verify your rack type (BMEXBP series) and available slots. Confirm your product version to determine current consumption. The BMENOC0301C requires no external power supply or accessories. If you need a communication module for a Modicon M580 rack, SpareTechPLC stocks this model with fast shipping. Contact SpareTechPLC for bulk pricing and availability.
Frequently Asked Questions
What is the main function of the BMENOC0301C?
It provides Ethernet communication for Modicon M580 racks, with three RJ45 ports and support for Modbus TCP and EtherNet/IP.
Can I use this module in a hazardous area?
Yes, it holds ATEX zone 2/22 and IECEx zone 2/22 certifications, plus Class I Division 2 rating.
How many modules can I install per rack?
You can install up to four BMENOC0301C modules in a single rack.
Does it require an external power supply?
No, it draws internal power from the rack backplane.
What is the current consumption?
It depends on product version: 900 mA at 3.3 V DC for version 13 and above, or 1800 mA for versions below 13.
