1. Central Controler of Parking Guidance System / parking system:
main functions:
CCU' s 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 equipment; besides it updates the LED display data via RS232-NODE.
One CCU can support 60 ZCU in max.

2. How Parking Guidance System / parking system functions:
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 Specification
Model number: key-C01
working temperature: -20C--+80C
Rate voltage: AC110--220V
Frenquency: 50--60HZ
Baud rate: RS-232-NODE: 9600bps; RS-232-PC: 57600bps.