Parameters:
Voltage rating:  DC5V
Current rating:  100mA
Output port:  com1, com2/com3
Communication frequency:  9600
com2:  To PC
com1:  To ZCU
Control quantity:  60 sub-node(ZCU/screen)
work temperature:   -20~80
frequency:   50~60HZ
communication: 2 RS-232 serial port  RS-232-NODE RS-232-PC
baud:  RS-232-NODE9600bps  RS-232-PC57600bps
distance:   ≤1000m

 Main function:
. CCU main function is to inquire about the relevant ZCU data via RS232-NODE by turns and process these data; then send these processed data to PC or other relevant equipments; besides it updates the LED displays data via RS232-NODE.
. One CCU can support 60 ZCU in max..

How Parking Guidance System 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.