The Honeywell IQ222 IQ220 24V AC DC novar controller module building automation is a control/interface board from Honeywell. It handles signal processing, communication, or logic functions as part of a PLC or machine control system, interfacing between the processor and connected I/O or peripherals. Key specifications noted on this listing include 24V AC. It is commonly in control cabinets and PLC-based automation systems.
