The Honeywell TR100 Wall Module is an advanced, highly configurable device that provides building automation connectivity that is well-suited for commercial building applications. TR100 can replace existing Honeywell wall modules using the existing tools familiar to installers. The Honeywell TR100 wall modules utilize Sylk communication, which is polarity insensitive and uses two wires. This device also supports BACnet MS/TP and Modbus RTU communications via RS-485 bus, which is prevalent in HVAC building control systems.