The Trane MOD02046 Communication Interface Module BCI-R is an essential HVAC control component designed to connect ReliaTel-based equipment with building automation systems. It operates using the BACnet communication protocol over an RS-485 network, enabling the exchange of operating data, equipment status, and diagnostic information. This module is commonly used with Trane Voyager, P... https://www.partshnc.com/trane-mod02046-communication-interface-module-bci-r-w-reliatel-systems