Automated Logic Corporation PROT485 Protection Board

The PROT485 is Automated Logic’s i-Vu Lightning Protection Board that shields BACnet MS/TP and other EIA-485 controllers from electrical surges. Installed at strategic points in an EIA-485 network, it helps preserve communication integrity by limiting transient voltages and reducing the risk of controller damage. The board provides dedicated surge protection along with bias and termination for EIA-485 segments, supporting more reliable network performance across the site. Designed for straightforward integration, it features snap-track mounting and removable screw-terminals to simplify field wiring and retrofit in existing installations. In CMnet/ARCNET environments, PROT485 is described as a network protection board and is noted as a replacement for older protection boards like NWPB, with compatibility reported for ARCNET at 156 kbps over EIA-485. Open Automated Logic documentation and product literature confirm its role in protecting i-Vu network devices and maintaining stable controller communications.