X05W Williams FCU Controller

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.


• DIN rail mountable
• Voltage: 24VAC
• Relay contact rating: 100–277VAC, 30A
• Three 0–5VDC analog inputs
• Two 0–10VDC analog outputs
• 2 digital inputs and outputs
• Expansion I / OWired S5 bus communications
• FCC, UL, CQC, CE, RoHS Approved


• X05W.US—UL, CE Mark listed BOM
• X05W.CN—CQC listed BOM
• X05W Data Sheet