The DAC-1180 is a fully programmable, Native BACnet® Advanced Application Controller that either communicates on Twisted-Pair Ethernet 10-BaseT using BACnet IP and BACnet over Ethernet or an RS-485 LAN using the BACnet MS/TP protocol. It is designed for a wide-range of applications that have medium local I/O requirements. It also supports BACstats and other Delta LINKnet devices.
The case of older models looked more like the DSC-1616E: