TAC Network 8000 Microzone 2 Controller. These also come under different brand names Barber Colman, Siebe, Invensys, Schneider Electric the company exchanged hands over the year but maintained this wonderful control line. This is a fully programmable controller using PSI software and communicates over a proprietary very reliable RS485 network called ASD. These are Tridium Niagara compatible with a separate ASD driver making them still viable even in a modern system. These were working pulls from an upgrade project in good condition they may show marks or scratches consistent with a used item. They are sold as is but they are visually inspected, powered up and communicated with PSI software before shipping.