Alerton’s VLCA-1688 is an advanced application controller (AAC; BTL listing is pending) with a high resolution 12-bit A/D; D/A converter and new, 32-bit processor and real-time clock that supports its own schedules, trendlogs and alarms. The VLCA-1688 includes monitored on-board Hand-Off-Auto (HOA) switches, Ethernet or MS/TP connectivity, and additional math functions beyond the standard VLC. It also leverages new DDC Function blocks such as an astronomical clock and wet bulb calculator. With 16 universal inputs, the VLCA-1688 economically fills the gap between the VLC-1188 and a VLX with EXP modules in an Alerton system.