ABB Bailey Infi 90 & Net 90 BRC300 Harmony Bridge Controller

Overview

The ABB BRC300, also cataloged as the BRC-300​ Harmony Bridge Controller, operates as a dedicated hardware component for data exchange and protocol bridging within Harmony rack-based control system networks.

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Flash Compatibility

The BRC300 utilizes deterministic backplane bus communication to maintain consistent data transfer rates between Harmony series controllers and I/O modules. Firmware flash compatibility is restricted to designated Harmony controller firmware releases; cross-series loading may result in operational faults or loss of network synchronization.

Frequently Asked Questions

Q: Can the BRC300 be hot-swapped while the rack is powered?

A: No. The module must be installed or removed only after the rack power supply is disconnected to prevent backplane damage.

Q: What is the maximum backplane current load supported by the BRC300?

A: The module draws 2 A at 5 VDC from the rack backplane supply. External loading calculations should account for this draw when sizing system power budgets.

Q: Does the BRC300 support firmware updates via network download?

A: Firmware updates must be performed using ABB-specified tools and compatible firmware images verified for the Harmony BRC-300 series.

Field Installation Guidelines

Mount the BRC300 into the designated Harmony rack slot, ensuring the module’s alignment pins engage fully with the backplane connector before securing the locking levers. Maintain proper clearance around the module for ventilation. All signal cabling must use shielded twisted-pair wiring with shield termination at the rack ground point to minimize electromagnetic interference. Verify that backplane power is stable at 5 VDC ±5% prior to system startup.

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