9300-8EDM | Allen-Bradley Ethernet Diagnostic Module, 8 Ports 10/100MBps

The 9300-8EDM is an Ethernet Diagnostic Module developed by Allen-Bradley for monitoring and diagnosing industrial Ethernet networks. It features eight 10/100 Mbps RJ-45 ports and supports multiple communication protocols including TCP/IP, EtherNet/IP, Modbus TCP, and UDP. This module allows users to detect network faults and optimize communication through detailed diagnostics. It is typically used in machine control and PLC-based architectures to ensure reliable data exchange. The device simplifies network troubleshooting and improves system uptime through real-time feedback.

The 9300-8EDM has a compact and rack-mountable design with dimensions of 112 mm in height, 222 mm in width, and 37.7 mm in depth. These measurements make it suitable for space-constrained control panels and communication cabinets. Despite its compact size, the module provides robust diagnostic performance across all eight Ethernet ports. Its shallow depth allows installation even in shallow enclosures, which is beneficial for modular layouts. The low-profile design also supports better airflow and thermal performance. This form factor is optimized for both DIN-rail and flat-surface mounting configurations.

The module includes a total of eight standard RJ-45 ports, each capable of operating at both 10 Mbps and 100 Mbps Ethernet speeds. These ports support full-duplex and half-duplex modes with auto-negotiation capabilities. Every port is independently monitored and provides individual diagnostics for issues such as cable faults or port collisions. The eight-port configuration allows a single module to supervise an entire segment of a distributed control network. It’s particularly useful in switch-less installations or for passive monitoring of PLC-to-HMI or PLC-to-PLC communication. Each port operates with integrated protection for long-term industrial reliability.

The 9300-8EDM offers powerful diagnostics such as cable length detection, duplex mismatch alerts, collision identification, and port utilization statistics. It also monitors frame errors and discards, helping detect faulty cables or devices. These features help network engineers identify root causes of communication issues without expensive external analyzers. Diagnostics are provided per-port, allowing precise fault isolation. Data is accessible through a built-in web interface or the RS-232 port. This comprehensive toolset minimizes downtime and simplifies preventive maintenance.

The module is certified to UL, CE, and C-Tick standards, verifying its compliance with international safety, emissions, and performance requirements. UL certification ensures it meets North American safety codes, while CE compliance certifies adherence to European Union directives. C-Tick confirms suitability for use in Australian industrial environments. These certifications are important for global installations where regulatory approval is required. They also guarantee that the product meets high-quality manufacturing and testing standards. This allows users to deploy the 9300-8EDM confidently in both local and export systems.