The X05W controls the Williams FCU model ER006W2B403R182 from an INNCOM by Honeywell thermostat by modulating cooling, heating, and fan motors and using a switched relay output for heat enabling.

It also provides inputs for monitoring and controlling discharge air temperature. The X05W is available in a DIN rail mountable enclosure. The X05W can also be used in other HVAC applications as well as in master contactor applications, dimmable ballast control, and other HVAC applications.