Johnson Controls F4-SNC16122-04H : SNC Supervisory Controller, Network Control Engine, 28 Total Onboard I/O: 10 UI, 6 BI, 4 CO, 4 AO, 4 BO, 4 Max Devices, BACnet/IP and BACnet MS/TP, Supports SA Bus Expansion, Display (Approval Required for Purchase)