B&R 0AC808.9-1 8-Port Industrial Ethernet Switch

Product Overview

The 0AC808.9-1 (0AC808.9-1) is a compact 8-port industrial Ethernet switch engineered for robust connectivity within B&R automation ecosystems. Designed for high-availability manufacturing environments—such as distributed I/O islands, robotic cell communication backbones, and plant-floor data aggregation nodes—this Layer 2 switch ensures deterministic packet handling for 10/100 Mbit/s traffic. By providing reliable hardware-level signal management and comprehensive diagnostic feedback via front-facing LEDs, the unit allows maintenance personnel to verify link integrity and network load at a glance, minimizing troubleshooting time during critical production uptime.

Technical Configuration

This switch is built for industrial durability, featuring a compact housing suitable for diverse mounting orientations and high-noise environments.

• Layer 2 Switching: Manages Ethernet frames efficiently across 8 shielded RJ45 ports, maintaining stable communication segments up to 100 meters.

• Integrated Diagnostics: The module provides real-time status monitoring. Network activity is indicated via RX (orange) LEDs, while link status and collision events are clearly differentiated by green and red L/C indicators.

• Flexible Installation: Engineered to be mounted in either face-up or vertical orientations, allowing for optimal integration into space-constrained control cabinets while maintaining an IP20 protection rating.

• Power Efficiency: Operates on a standard 18 to 30 VDC industrial supply with a maximum power consumption of only 3 W, ensuring minimal thermal impact on cabinet cooling systems.

Technical Specifications

Industrial Hardware FAQs

What does a red L/C LED indicate on the switch?

A red illumination of the L/C (Link/Collision) LED indicates that a collision has been detected on that specific Ethernet port. Frequent collision events typically point to excessive network traffic, duplex mismatches between the switch and the connected device, or faulty cabling/shielding issues.

Can I use this switch for high-speed motion control networks?

The 0AC808.9-1 is a standard Layer 2 industrial switch. While it is suitable for general Ethernet traffic, diagnostic data, and HMI communication, always refer to your specific motion control protocol documentation (such as POWERLINK) to confirm if a standard switch meets your system's determinism and latency requirements.

How is the module powered in the control cabinet?

The unit accepts a 24 VDC nominal supply (18 to 30 VDC range). It is recommended to power this switch from the same regulated power rail as your PLC or control components to ensure a shared common ground, which helps in suppressing ground loops in communication lines.

Field Commissioning and Safety Guidelines

Cabling and Shielding Best Practices

Even though the switch features shielded RJ45 ports, the overall network performance relies on high-quality Cat5e or Cat6 shielded cables. Ensure that cable shields are properly terminated to the chassis ground at the cabinet entry point. Avoid running Ethernet cables in parallel with high-voltage motor power lines to prevent induced noise, which may manifest as intermittent link drops or collision errors.

Thermal and Space Management

The 0AC808.9-1 is fanless and relies on natural convection. Ensure that the cooling slots on the housing are not obstructed by wire ducts or large cable bundles. Maintain a clearance of at least 20 mm around the device to ensure the 3 W power dissipation does not cause localized heating, especially when the unit is mounted vertically in a high-density cabinet.

Diagnostic Monitoring During Startup

During initial commissioning, observe the "OK" (orange) LED to confirm that the internal voltage regulator is operating correctly. If the switch fails to initialize, check for input voltage drops below 18 VDC. Use the LED diagnostics to map each cable run; if an RX (orange) LED is constantly flickering on a port where no activity is expected, investigate that node for a potential network loop or broadcast storm.