Digital 4 wire communication solution for advance requirements. The end use remain per floor access control but here the unit is integrated with elevator controller which has Access control interface already provided. There is no need to modify Car operating button but the access is controlled by mother board n car top which is takes input from card reader and communicate with elevator controller on 4 wire communication there by assuring seamless exchange of information

The card can be programmed as required. Once card is shown floor to chich access is granted will be able to press button in 5 sec. other buttons will remain non operative. The card can not place card directly but need to be pressed.
Matrix is economical solution for per floor access.