1.Zone Control Unitof Parking Equipment 1) The LCD on ZCUis toshow the detectors' work status. 2)Main function: . It is to inquire about the relevant sensors status via RS485-B by turns, and forward the data to CCU by RS485-C.Meanwhile, the ZCU forwards the command of CCU to LED screen via RS485-B. . The RS485-B data bus can support 60 UD in max., whose addresses must not be set repeatedly. 2.How ParkingEquipment Works: Firstly, UD takes use of ultrasonic wave to detect the car space to see if it is occupied by vehicles and transfer relative command to LED Indicator which will turn from green to RED when occupied, or it will keep GREEN; meanwhile, the UD transmit its status message to ZCU immediately, and ZCU will collect and forward the information to CCU; CCU processes these data and sends the relevant command to ZCU and LED panel. 3. We have the most successful cases in China, pls kindly note below about some of them: 1) May,2008 1000 cars BeijingSOLANA Lifestyle shopping park 2)July,2008 3850 cars SingaporeChangi Airport(OEM) 3)August,2008 200 cars JapanShin-TokyoBuilding(TOKYO Marunouchi) 4)August,2008 70 cars Beijinghongqiao pearl-market 5)Sep,2008 3160 cars PhilippinesMall of Asia (Manila SM) 6)Oct,2008 1500 cars SingaporeHarbourfront Centre(OEM) 7)Nov,2008 320 cars ThailandKasikorn Bank 8)Feb,2009 241 bays Xuchang PANGDONGLAI Plaza SHEN ZHENG WALMART 1800LOTS