EasyIO-FC-20 Standalone BACnet/Modbus Selectable Controller, RS485 is a cost effective Programmable Controller. Programmed with Workbench or CPT, selectable between BACnet and Modbus, BACnet. 20 IOs include, 12 Universal Inputs (UI) supporting current, voltage and resistance based sensor, 4 electrically isolated Digital Outputs (DO) and 4 Analog Outputs supporting current and voltage outputs