The ECM motor interface board provides a clean and well labeled connection point for low voltage wiring. The low voltage wiring includes thermostat, heat pump, peak control, input sensors and outputs to the ECM motor and processor control board. An onboard relay provides control for stage 2 compressor calls enabling the system to be interfaced with a 2 stage heat pump. The board provides signal wire outputs to the ECM motor to select the target CFM during heat and cool calls. The board provides a chassis bond (ground) for the "C" terminal.
