parking guidance system

Keytop parking guidance system provides 3 types of data communication: RS485, LAN and wireless communication.
1. RS 485 communication: RS485 use shielded twisted pair to connect node controllers  in the carpark,  all together connected hand in hand and finally sending its output to central controller. RS485 has good quality of anti-noise, long transmission distance and multi-station capabilities. The biggest advantage is the low costs of wire material and the disadvantage is that the communication speed is slower than that of LAN and wireless transmission.

  2. LAN communication: LAN system network cables are use to connect multiple node controllers in the parking lot, separated by the network switches for parallel communication with very high rate and the transmission speed is higher than RS485 communication.
 
3. Wireless communication: Wireless communication uses the wireless receiver installed in every storey of the carpark to receive the communication signals that the node controllers  in the same storey has sent, then transmits them to the central controller through network switches. The advantage is greatly reducing the system wiring and the construction volume.