Schneider BMENOC0301 Ethernet Communication Module

The Schneider BMENOC0301 is an Ethernet communication module for the Modicon M580 programmable logic controller platform. This module adds advanced networking capabilities to the M580 system, featuring three Ethernet RJ45 ports (10/100 Mbps) for connection to industrial networks. It supports Modbus TCP and EtherNet/IP protocols, enabling seamless communication with supervisory systems, HMIs, drives, and other automation devices. The BMENOC0301 is suitable for applications requiring high-bandwidth data exchange, remote I/O scanning, and network redundancy.

Technical Specifications

The BMENOC0301 features three Ethernet ports: two external RJ45 10/100 Mbps ports for network connectivity and one internal X-bus port for communication with the M580 CPU. Supported protocols include Modbus TCP (client and server), EtherNet/IP (scanner and adapter), and SNMP for network management. The module supports bandwidth management, FDR (Fast Device Replacement) server, and a built-in web server for diagnostics and configuration. The BMENOC0301 functions as an EtherNet/IP scanner, allowing the M580 CPU to directly control remote I/O modules and drives over Ethernet without additional programming. The module is powered via the M580 rack backplane. Net weight is approximately 0.2 kg (0.4 lb). Protection rating is IP20. Dimensions: 51 mm × 102 mm × 102 mm (approx.). The module consumes 5 V DC from the backplane. Operating temperature range is 0°C to 60°C.

Key Features

• 3 Ethernet RJ45 ports (10/100 Mbps), double shielded twisted pair

• Modbus TCP server and client (I/O scanning and messaging)

• EtherNet/IP scanner and adapter functionality

• Built-in web server for diagnostics and module configuration

• FDR (Fast Device Replacement) server for automatic device configuration

• SNMP network management support

• Bandwidth management for prioritized traffic

• RSTP (Rapid Spanning Tree Protocol) for network redundancy

• Hot standby support with dual network interfaces

• Compatible with Modicon M580 CPUs (BMEP58xxxx, BMEH58xxxx)

Integration with Modicon M580

The BMENOC0301 installs into an M580 rack alongside the CPU and other I/O modules. The module communicates with the CPU via the X-bus internal backplane, providing high-speed data exchange without consuming rack I/O addresses. Configuration is performed within EcoStruxure Control Expert (formerly Unity Pro) software. The module’s Ethernet ports can be configured for different network roles: one port can connect to the plant Ethernet network, another can connect to a local device network, and the third can serve as a redundant link. The embedded Ethernet switch allows daisy-chaining of multiple modules or devices without requiring external switches.

EtherNet/IP Scanner Function

One of the key capabilities of the BMENOC0301 is its EtherNet/IP scanner function. This allows the M580 CPU to directly communicate with EtherNet/IP adapters, such as remote I/O racks (e.g., Modicon M580 local I/O over Ethernet) or third-party EtherNet/IP-enabled devices (drives, HMIs, barcode readers). The scanner feature eliminates the need for a separate EtherNet/IP scanner module and simplifies the programming of distributed I/O. The module manages the cyclic I/O exchange and handles implicit messaging, while the CPU processes the I/O data in its scan cycle.

Web Server and Diagnostics

The BMENOC0301 includes a built-in web server accessible via any standard web browser over the Ethernet network. The web interface provides real-time status of the module’s Ethernet ports, communication statistics, module health, and network diagnostic information (link status, packet counters, error logs). The web server also provides access to configuration parameters, firmware version, and a device identity page. For maintenance personnel, the web server simplifies troubleshooting by providing instant visibility into network communication without requiring the programming software.

Network Redundancy and Reliability

The BMENOC0301 supports RSTP (Rapid Spanning Tree Protocol) for Ethernet network redundancy. When configured in a ring topology, the module automatically detects a cable break and reroutes traffic within milliseconds, maintaining communication between devices and the PLC. This is particularly valuable for critical applications where network downtime is unacceptable. The module also supports dual-homing and link aggregation for increased bandwidth or redundant paths.

Applications

The BMENOC0301 is used in industrial automation systems requiring Ethernet connectivity for integration with enterprise networks, SCADA systems, and distributed I/O. Typical applications include manufacturing plants, material handling systems, water and wastewater treatment facilities, power plants, and mining operations. The module is suitable for applications where the M580 CPU acts as a data concentrator, communicating with multiple remote devices over Ethernet.

Installation and Configuration

Insert the BMENOC0301 into an available rack slot of a Modicon M580 rack (backplane). Secure the module with the mounting screws. Connect Ethernet cables to the RJ45 ports; use shielded Cat5e or Cat6 cables for industrial environments. Ensure proper grounding of the cable shields. Configure the module’s IP addresses, subnet masks, and gateway settings using Control Expert software. Define the device name and assign communication roles (Modbus TCP server/client, EtherNet/IP scanner/adapter). For EtherNet/IP scanner applications, import the EDS files of remote devices and configure the data exchange parameters. The module’s I/O address ranges are automatically assigned by the configuration software. Download the configuration to the CPU, and the module will begin operation.

Environmental and Compliance

The BMENOC0301 is CE, UL, and CSA certified. It complies with RoHS directives. Operating temperature: 0°C to 60°C. Storage temperature: -40°C to 85°C. Humidity: 10% to 95% non-condensing. The module must be installed in a pollution degree 2 environment (control cabinet). The module is IP20 rated and not suitable for outdoor installation without additional enclosure.

Conclusion

The Schneider BMENOC0301 Ethernet communication module enhances the Modicon M580 PLC with robust Ethernet connectivity, including Modbus TCP, EtherNet/IP scanning, web server functionality, and network redundancy. Its three 10/100 Mbps ports and integrated switch provide flexible and reliable integration into industrial networks.