Johnson Controls MS-IOM4710-0 Input Output Module. 17-Point IOM with 6 UI, 2 BI, 3 BO, 2 AO, 4 CO, 24 VAC, and SA Bus, Cover and Triac Mounting Base. These two components form the completed module. .Metasys MS-IOM4710-0 Metasys MS-IOB4710-0. Removed from working job. Applied power in shop and power light comes on.